{
  "data": {
    "a": {
      "slug": "gemini-4-carbon",
      "name": "Gemini 4 Carbon",
      "vendor": "Google",
      "vendorUrl": "https://ai.google.dev",
      "kind": "model",
      "category": "inference",
      "summary": "Gemini 4 Carbon is Google's strongest Gemini model, for long agentic coding, cybersecurity and research work, on the paid tier of the Gemini API with a 1,048,576-token limit shared between input and output.",
      "url": "https://www.anchorterminal.com/tools/gemini-4-carbon",
      "markdownUrl": "https://www.anchorterminal.com/tools/gemini-4-carbon.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/gemini-4-carbon.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/gemini-4-carbon.json",
      "dns": "gemini-4-carbon.grade.anchorterminal.com",
      "license": "Closed model, used through the Gemini API and Google's apps under Google's terms",
      "transports": [],
      "remoteUrl": "https://generativelanguage.googleapis.com/v1beta",
      "packages": [],
      "auth": "api-key",
      "authNotes": "An `x-goog-api-key` from AI Studio on a project with billing, since Carbon is on the paid tier only, per the Gemini API listing and Google's developer post. Google AI Ultra subscribers can also use it in AI Studio and Antigravity. The `gemini-4-carbon-cyber-permissive` variant needs a project approved through Google's Fairwind Program.",
      "pricing": "usage",
      "pricingNotes": "Google's announcement gives an introductory $2 per million input tokens and $10 output, cached input 95% off, then $4 and $20, with no end date for the introduction. Paid tier only, no free tier. Every processed token is billed, thinking included (checked 2026-11-10).",
      "priceSummary": "Pay per use",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No machine payment. Paid use needs billing on a Cloud project, per the Gemini API listing (checked 2026-11-10).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": null,
        "npmWeekly": null,
        "pypiWeekly": null,
        "asOf": "2026-11-10"
      },
      "docsUrl": "https://docs.cloud.google.com/gemini-enterprise-agent-platform/models/guides/gemini-4-carbon",
      "llmsTxt": "https://ai.google.dev/gemini-api/docs/llms.txt",
      "capabilities": [
        "inference.llm"
      ],
      "tags": [
        "official",
        "hosted",
        "model",
        "multimodal",
        "reasoning",
        "long-context",
        "tool-calling",
        "usage-priced",
        "card-required",
        "closed-source",
        "llms-txt",
        "new"
      ],
      "lastRelease": "2026-11-10",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 62.6,
        "grade": "B",
        "agentReady": false,
        "rank": 555,
        "ranked": true,
        "rankOf": 1518,
        "categoryRank": 22,
        "methodology": "0.7",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 93,
          "maintenance": 83,
          "payments": 20,
          "reliability": 40,
          "schema": 85,
          "security": 55,
          "transparency": 72
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-11-10"
        },
        "negative": 0,
        "verdict": "Google's strongest model on the same Gemini API as Argon, with a 1M-token budget, function calling and structured output, at an introductory $2 and $10 per million tokens. Paid tier only, sampling parameters are ignored or refused, its launch stage isn't stated, and the price rises to $4 and $20 at a date Google hasn't given.",
        "bestFor": "Agents on the hardest long tasks (multi-step debugging, large codebases, open-ended research, security work) that can pay frontier prices and already use the Gemini API.",
        "strengths": [
          "Introductory price of $2 input and $10 output per million tokens, with cached input 95% off",
          "1,048,576 tokens shared between input and output, with long decodes for big outputs",
          "Function calling, structured output, Google Search grounding and background execution",
          "Thinking levels LOW, MEDIUM (default) and HIGH, and implicit caching on by default",
          "The same API, keys and SDKs as Gemini 4 Argon, so switching is a model ID"
        ],
        "weaknesses": [
          "Paid tier only, with no free tier to try it on",
          "temperature, top_p and top_k are ignored, and thinking_budget, MINIMAL, penalties and extra candidates return a 400",
          "No explicit context caching, and prefilled model turns aren't accepted",
          "The price goes to $4 and $20 after an introduction with no end date given",
          "Benchmark figures are Google's own, and the launch stage isn't stated"
        ],
        "agentNotes": [
          "Call generateContent at https://generativelanguage.googleapis.com/v1beta with model gemini-4-carbon and an x-goog-api-key on a billed project",
          "Set thinking_level (LOW, MEDIUM or HIGH) instead of thinking_budget, and don't send temperature, top_p or top_k",
          "Count output against the same 1,048,576-token limit as the input, and set max_output_tokens for long answers",
          "Put static prompt content first so implicit caching applies; explicit caches aren't supported",
          "Use gemini-4-argon for most coding and knowledge work, and Carbon for the hardest long tasks, as Google suggests"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 0,
        "avgRating": 0,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "B",
            "methodology": "0.7",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 62.6
          }
        ],
        "editorialScores": {
          "ergonomics": 93,
          "maintenance": 83,
          "payments": 20,
          "reliability": 40,
          "schema": 85,
          "security": 55,
          "transparency": 55
        },
        "provenanceScore": 89,
        "checked": {
          "categories": {
            "ergonomics": "2026-11-10",
            "maintenance": "2026-11-10",
            "payments": "2026-11-10",
            "reliability": "2026-11-10",
            "schema": "2026-11-10",
            "security": "2026-11-10",
            "transparency": "2026-11-10"
          },
          "last": "2026-11-10",
          "oldest": "2026-11-10",
          "stale": false,
          "staleAfterDays": 90
        }
      },
      "connect": {
        "http": "curl \"https://generativelanguage.googleapis.com/v1beta/models/gemini-4-carbon:generateContent\" \\\n  -H \"x-goog-api-key: $GEMINI_API_KEY\" -H \"content-type: application/json\" \\\n  -d '{\"contents\":[{\"parts\":[{\"text\":\"hello\"}]}]}'"
      },
      "letme": {
        "capability": "https://letme.dev/inference.llm",
        "tool": "https://letme.dev/gemini-4-carbon"
      },
      "sameCompany": [
        "vertex-ai",
        "gemini-embedding",
        "vertex-ai-tuning",
        "cloud-run-gpus",
        "google-model-armor",
        "google-imagen",
        "google-veo",
        "google-lyria",
        "google-speech-to-text",
        "google-cloud-tts",
        "gemini-live",
        "google-adk",
        "google-memory-bank",
        "google-secret-manager",
        "google-cloud-document-ai",
        "google-weather-api",
        "chrome-devtools-mcp",
        "google-maps-platform",
        "google-cloud-translation",
        "google-calendar-api",
        "firebase-cloud-messaging",
        "google-cloud-storage",
        "google-drive-api",
        "gemini-enterprise",
        "gemini-cli",
        "google-search-console",
        "google-ads-api",
        "google-forms",
        "google-sheets-api",
        "gmail-api",
        "google-people-api"
      ],
      "sameModel": [
        "gemini-api"
      ],
      "area": "models",
      "unitPrices": [
        {
          "item": "Gemini 4 Carbon input",
          "unit": "1m-tokens",
          "usd": 2,
          "note": "Introductory; $4 after, date not given"
        },
        {
          "item": "Gemini 4 Carbon cached input",
          "unit": "1m-tokens",
          "usd": 0.1,
          "note": "95% off input"
        },
        {
          "item": "Gemini 4 Carbon output",
          "unit": "1m-tokens",
          "usd": 10,
          "note": "Introductory; $20 after"
        }
      ],
      "provenance": {
        "legalEntity": "Google LLC",
        "domain": "google.com",
        "domainRegistered": "1997-09-15",
        "domainNote": "The endpoint is on googleapis.com, Google's API domain. google.com was registered in 1997.",
        "endpointOnVendorDomain": true,
        "terms": "https://ai.google.dev/gemini-api/terms",
        "privacy": "https://policies.google.com/privacy",
        "statusPage": "https://aistudio.google.com/status",
        "changelog": "https://ai.google.dev/gemini-api/docs/changelog",
        "securityTxt": "valid",
        "checked": "2026-11-10",
        "score": 89
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/gemini-4-carbon.json",
      "live": {
        "slug": "gemini-4-carbon",
        "probe": {
          "target": "https://generativelanguage.googleapis.com/v1beta",
          "method": "get",
          "lastAt": "2026-11-10T23:47:03.904361517Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 35,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 41,
          "p95ms24h": 130,
          "samples24h": 63,
          "samples30d": 63,
          "days": [
            {
              "date": "2026-11-10",
              "probes": 63,
              "ok": 63
            }
          ],
          "since": "2026-11-10T17:42:25.910455739Z"
        },
        "vendorStatus": {
          "page": "https://aistudio.google.com/status",
          "indicator": "unknown",
          "summary": "no machine-readable status found",
          "checkedAt": "2026-11-10T23:00:42.593790699Z"
        },
        "updatedAt": "2026-11-10T23:47:03.904361517Z"
      },
      "streak": {
        "days": 0,
        "from": "2026-11-10",
        "sinceWatching": true,
        "best": 0
      }
    },
    "answer": "Gemini 4 Carbon and Gemini Developer API score within a point of each other on agent readiness, 62.6 (B) and 62.2 (B). Gemini Developer API leads on reliability and payments \u0026 pricing.",
    "b": {
      "slug": "gemini-api",
      "name": "Gemini Developer API",
      "vendor": "Google",
      "vendorUrl": "https://ai.google.dev",
      "kind": "model",
      "category": "inference",
      "summary": "Google's API for Gemini models, including content generation and agent interactions.",
      "url": "https://www.anchorterminal.com/tools/gemini-api",
      "markdownUrl": "https://www.anchorterminal.com/tools/gemini-api.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/gemini-api.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/gemini-api.json",
      "dns": "gemini-api.grade.anchorterminal.com",
      "repo": "https://github.com/googleapis/python-genai",
      "license": "Apache-2.0 (SDKs)",
      "transports": [
        "http"
      ],
      "remoteUrl": "https://generativelanguage.googleapis.com/v1beta",
      "packages": [
        {
          "registry": "pypi",
          "name": "google-genai",
          "main": true
        },
        {
          "registry": "npm",
          "name": "@google/genai",
          "main": true
        }
      ],
      "auth": "api-key",
      "authNotes": "`x-goog-api-key` header with a key from AI Studio. A Google account is needed to make one.",
      "pricing": "freemium",
      "pricingNotes": "Free tier on 3.8 Flash, 3.6 Flash and the Flash-Lite models, not on Gemini 4 Argon or 3.1 Pro preview, and free-tier content is used to improve Google products. Gemini 4 Argon (`gemini-4-argon`) costs $2/$10 per million tokens through 2026-11-30, then $4/$20, with implicit caching only. 3.1 Pro preview costs $2/$12 per million tokens, $4/$18 over 200K. 3.8 Flash is $0.75/$3.75 until 2026-12-31, then $1.50/$7.50. Cached input 0.1x. Nano Banana 2.1 (`gemini-nano-banana-2.1`, images) is paid tier only at $1.50 input and $30 per million image output tokens, about $0.034 a 1K image, $0.050 at 2K and $0.113 at 4K, half that in batch. Search grounding 5,000 free a month, then $14 per 1,000. Batch half price (https://ai.google.dev/gemini-api/docs/pricing).",
      "priceSummary": "from $0.25 / 1M in",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No machine payment. The free tier needs a Google account and paid use needs billing on a Cloud project.",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": 3992,
        "npmWeekly": null,
        "pypiWeekly": null,
        "asOf": "2026-09-26"
      },
      "docsUrl": "https://ai.google.dev/gemini-api/docs",
      "rateLimitsUrl": "https://ai.google.dev/gemini-api/docs/rate-limits",
      "llmsTxt": "https://ai.google.dev/gemini-api/docs/llms.txt",
      "capabilities": [
        "inference.llm"
      ],
      "tags": [
        "official",
        "hosted",
        "model",
        "free-tier",
        "no-card",
        "llms-txt"
      ],
      "lastRelease": "2026-10-30",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 62.2,
        "grade": "B",
        "agentReady": false,
        "rank": 571,
        "ranked": true,
        "rankOf": 1518,
        "categoryRank": 24,
        "methodology": "0.7",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 93,
          "maintenance": 83,
          "payments": 40,
          "reliability": 45,
          "schema": 85,
          "security": 50,
          "transparency": 72
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-11-01"
        },
        "negative": -3,
        "negativeNotes": [
          "2026-10-08. Google deprecated the generally available `gemini-3.7-flash` and `gemini-3.5-flash` and routed API requests for them to `gemini-3.8-flash` and `gemini-3.6-flash` the same day, announced in that day's changelog. Callers pinned to those names got a different model without notice, the reading DeepSeek API takes for its 10 September routing, so 3 points (https://ai.google.dev/gemini-api/docs/changelog, https://ai.google.dev/gemini-api/docs/deprecations)."
        ],
        "verdict": "Free tier on 3.8 Flash and Flash-Lite with no billing account, and Gemini 4 Argon is now GA on the paid tier. Free-tier prompts and responses improve Google products and may be read by human reviewers, and the API accepts an OAuth token in the URL query string.",
        "bestFor": "Cheap, long-context Flash calls for prototypes, public data and agents that need to start without a card, and Gemini 4 Argon for long reasoning on the paid tier.",
        "strengths": [
          "Free tier on 3.8 Flash and Flash-Lite with no billing account",
          "Gemini 4 Argon went GA on 13 October 2026 with a 1,048,576-token shared window and long decode up to 1M tokens",
          "Backoff guidance with jitter, and the Python SDK retries transient errors four times",
          "New keys are bound to a service account and restricted to the Gemini API, and unrestricted standard keys are rejected",
          "A keyless Discovery document types the v1beta GenerateContent surface, and function calling can be forced to named tools"
        ],
        "weaknesses": [
          "Free-tier prompts and responses improve Google products and may be read by human reviewers",
          "The API reads an OAuth access token from the `access_token` query parameter",
          "No SLA and no zero-retention route found for the Developer API",
          "Gemini 4 Argon isn't on the free tier and doesn't support explicit context caching",
          "Shutdown dates are 'earliest possible' with no stated minimum notice, and one preview agent got 15 days"
        ],
        "agentNotes": [
          "Never send customer data through a free-tier key. Link billing first",
          "Send keys in the `x-goog-api-key` header, never as `key` or `access_token` in the URL",
          "Back off exponentially on 429 RESOURCE_EXHAUSTED and 503, and don't retry 400, 402 or 403",
          "Remove temperature, top_p and top_k. Gemini 4 and 3.6+ ignore them and a future release returns 400",
          "On `gemini-4-argon`, set max_output_tokens to at least 32,768 and client timeouts to 15 minutes, or use background execution"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 3.5,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "B",
            "methodology": "0.7",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 62.2
          }
        ],
        "editorialScores": {
          "ergonomics": 93,
          "maintenance": 83,
          "payments": 40,
          "reliability": 45,
          "schema": 85,
          "security": 50,
          "transparency": 55
        },
        "provenanceScore": 89,
        "checked": {
          "categories": {
            "ergonomics": "2026-11-01",
            "maintenance": "2026-11-01",
            "payments": "2026-11-01",
            "reliability": "2026-11-01",
            "schema": "2026-11-01",
            "security": "2026-11-01",
            "transparency": "2026-11-01"
          },
          "last": "2026-11-01",
          "lastMoved": "2026-11-01",
          "oldest": "2026-11-01",
          "stale": false,
          "staleAfterDays": 90
        }
      },
      "connect": {
        "install": "pip install google-genai   # or: npm i @google/genai",
        "http": "curl \"https://generativelanguage.googleapis.com/v1beta/models/gemini-3.8-flash:generateContent\" \\\n  -H \"x-goog-api-key: $GEMINI_API_KEY\" -H \"content-type: application/json\" \\\n  -d '{\"contents\":[{\"parts\":[{\"text\":\"hello\"}]}]}'"
      },
      "letme": {
        "capability": "https://letme.dev/inference.llm",
        "tool": "https://letme.dev/gemini-api"
      },
      "sameCompany": [
        "vertex-ai",
        "gemini-embedding",
        "vertex-ai-tuning",
        "cloud-run-gpus",
        "google-model-armor",
        "google-imagen",
        "google-veo",
        "google-lyria",
        "google-speech-to-text",
        "google-cloud-tts",
        "gemini-live",
        "google-adk",
        "google-memory-bank",
        "google-secret-manager",
        "google-cloud-document-ai",
        "google-weather-api",
        "chrome-devtools-mcp",
        "google-maps-platform",
        "google-cloud-translation",
        "google-calendar-api",
        "firebase-cloud-messaging",
        "google-cloud-storage",
        "google-drive-api",
        "gemini-enterprise",
        "gemini-cli",
        "google-search-console",
        "google-ads-api",
        "google-forms",
        "google-sheets-api",
        "gmail-api",
        "google-people-api"
      ],
      "sameModel": [
        "gemini-4-carbon",
        "gemma-4-26b-a4b-it",
        "gemma-4-31b-it"
      ],
      "area": "models",
      "unitPrices": [
        {
          "item": "Search grounding over 5,000 a month",
          "unit": "1k-requests",
          "usd": 14
        },
        {
          "item": "Nano Banana 2.1 image, 1K",
          "unit": "image",
          "usd": 0.0336,
          "note": "1,120 output tokens at $30 per million. Paid tier only, half price in batch"
        },
        {
          "item": "Nano Banana 2.1 image, 2K",
          "unit": "image",
          "usd": 0.0504,
          "note": "1,680 output tokens"
        },
        {
          "item": "Nano Banana 2.1 image, 4K",
          "unit": "image",
          "usd": 0.113,
          "note": "3,780 output tokens"
        }
      ],
      "provenance": {
        "legalEntity": "Google LLC",
        "domain": "google.com",
        "domainRegistered": "1997-09-15",
        "domainNote": "The endpoint is on googleapis.com, Google's API domain. google.com was registered in 1997.",
        "endpointOnVendorDomain": true,
        "terms": "https://ai.google.dev/gemini-api/terms",
        "privacy": "https://policies.google.com/privacy",
        "statusPage": "https://aistudio.google.com/status",
        "changelog": "https://ai.google.dev/gemini-api/docs/changelog",
        "securityTxt": "valid",
        "checked": "2026-11-01",
        "score": 89
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/gemini-api.json",
      "live": {
        "slug": "gemini-api",
        "probe": {
          "target": "https://generativelanguage.googleapis.com/v1beta",
          "method": "get",
          "lastAt": "2026-11-10T23:47:03.94027292Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 47,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 36,
          "p95ms24h": 119,
          "samples24h": 244,
          "samples30d": 7904,
          "days": [
            {
              "date": "2026-10-10",
              "probes": 247,
              "ok": 247
            },
            {
              "date": "2026-10-11",
              "probes": 247,
              "ok": 247
            },
            {
              "date": "2026-10-12",
              "probes": 247,
              "ok": 247
            },
            {
              "date": "2026-10-13",
              "probes": 248,
              "ok": 248
            },
            {
              "date": "2026-10-14",
              "probes": 249,
              "ok": 249
            },
            {
              "date": "2026-10-15",
              "probes": 253,
              "ok": 253
            },
            {
              "date": "2026-10-16",
              "probes": 252,
              "ok": 252
            },
            {
              "date": "2026-10-17",
              "probes": 253,
              "ok": 253
            },
            {
              "date": "2026-10-18",
              "probes": 256,
              "ok": 256
            },
            {
              "date": "2026-10-19",
              "probes": 255,
              "ok": 255
            },
            {
              "date": "2026-10-20",
              "probes": 252,
              "ok": 252
            },
            {
              "date": "2026-10-21",
              "probes": 253,
              "ok": 253
            },
            {
              "date": "2026-10-22",
              "probes": 253,
              "ok": 253
            },
            {
              "date": "2026-10-23",
              "probes": 248,
              "ok": 248
            },
            {
              "date": "2026-10-24",
              "probes": 251,
              "ok": 251
            },
            {
              "date": "2026-10-25",
              "probes": 250,
              "ok": 250
            },
            {
              "date": "2026-10-26",
              "probes": 252,
              "ok": 252
            },
            {
              "date": "2026-10-27",
              "probes": 249,
              "ok": 249
            },
            {
              "date": "2026-10-28",
              "probes": 251,
              "ok": 251
            },
            {
              "date": "2026-10-29",
              "probes": 248,
              "ok": 248
            },
            {
              "date": "2026-10-30",
              "probes": 249,
              "ok": 249
            },
            {
              "date": "2026-10-31",
              "probes": 251,
              "ok": 251
            },
            {
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          "a": "Model reading for gemini-4-carbon on the Gemini API. Platform facts are the Gemini API listing's (gemini-api, re-read 1 November), carried over as RULES.md allows for a model on an already graded platform. No machine payment protocol (0). Introductory prices published in Google's 28 October announcement without a login, $2 and $10, then $4 and $20; the Gemini API pricing page as read on 10 November showed no Carbon row, so the figures rest on the announcement (20). No free tier: Google's developer post puts Carbon on the paid tier (0). A Google account and AI Studio for a key (0). 0 + 20 + 0 + 0 = 20.",
          "b": "No machine payment protocol (0). Per-token prices published without a login, re-read on 1 November (20). Free tier on 3.8 Flash, 3.6 Flash, 3.5 Flash-Lite and 3.1 Flash-Lite, not on `gemini-4-argon` or 3.1 Pro preview, and the rate-limits page needs only an active project for the free tier and a linked billing account from Tier 1, so the free tier needs no card (20). A Google account and AI Studio are needed for a key (0)."
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        "reasons": {
          "a": "Model reading for gemini-4-carbon on the Gemini API. Platform facts are the Gemini API listing's (gemini-api, re-read 1 November), carried over as RULES.md allows for a model on an already graded platform. Status page at aistudio.google.com/status with no readable components or history (10 of 20) and no readable incident record (5 of 30). Rate-limit tiers and spend limits published, per-model limits in AI Studio (5 of 15). Backoff guidance for 429 and 503 and SDK retries (15). No SLA (0). Carbon's launch stage isn't stated in Google's developer post, the Antigravity post or the Cloud developer guide read on 10 November, and the model ID carries no preview label, so half (5 of 10, a judgement call; Argon's GA earned the platform 10). 10 + 5 + 5 + 15 + 0 + 5 = 40.",
          "b": "Status page at aistudio.google.com/status (robots.txt allows it), but on 1 November it still returned a script shell titled Google AI Studio with no components or history, so 10 of 20, and 5 of 30 for the incident line with no readable record, as the Gemini Live and Gemini Embedding listings read the same page. Google Cloud's status dashboard covers Vertex AI products, not this endpoint. Per-model RPM and TPM live in AI Studio. The public rate-limits page, re-read on 1 November, publishes tier rules, spend-based limits of $10, $50 and $200 per 10 minutes for Tiers 1 to 3, and batch queue limits (5 of 15). The troubleshooting page, re-read on 1 November, gives exponential backoff with jitter for 429 RESOURCE_EXHAUSTED and 503 UNAVAILABLE, says to retry 429, 408 and 5xx and not 400, 402 or 403, and says the Python SDK retries transient errors up to four times (15). No SLA found for the Developer API (0). The flagship `gemini-4-argon` went GA on 13 October 2026 and the default 3.8 Flash is GA, and the Interactions API the guides lead with has been Generally Available since June 2026. The listing's example and the SDKs default to the `v1beta` path, which Google labels beta, but the API versions page, read on 1 November, says the stable `v1` path carries the Interactions API, generateContent, function calling and structured output and supports every model, so the surface is available as GA, the reading Gemini Embedding takes on the same endpoint. Gemini Live keeps a deduction because the Live API runs on `v1beta` only (10). Before 13 October the only Pro model was `gemini-3.1-pro-preview` (5 of 10)."
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        "reasons": {
          "a": "Model reading for gemini-4-carbon on the Gemini API. Platform facts are the Gemini API listing's (gemini-api, re-read 1 November), carried over as RULES.md allows for a model on an already graded platform. Keys bound to a service account and restricted to the Gemini API, with no scopes and a token accepted in the URL (15 of 30, the platform's deduction). Carbon is on the paid tier only, and Google's terms say paid-tier content isn't used to improve products; AI Studio use under a Google AI Ultra subscription falls under terms we didn't read, so 15 of 20 (a judgement call; the platform's 10 is for its free tier). Abuse retention with no number, and new paid projects store requests by default since 26 October (5 of 15). Request logs for billed projects (15). security.txt and a reward programme, no certification naming the API (5 of 20). 15 + 15 + 5 + 15 + 5 = 55.",
          "b": "Model reading. Keys live in a Cloud project. Since 28 May 2026 new keys are authorisation keys bound to a service account and restricted to the Gemini API, keys can be limited by IP or origin, unrestricted standard keys are rejected, and the docs give a leak checklist, per the API key page re-read on 1 November. No permission scopes, so 25 of 30, less 10 because the API reads a token from the URL. The Discovery document (revision 20261101) lists `access_token`, `oauth_token` and `key` as query parameters, and on 1 November a generateContent request with no credential answered 403 'Method doesn't allow unregistered callers' while one with a made-up `?access_token=` answered 401 'Request had invalid authentication credentials' (ACCESS_TOKEN_TYPE_UNSUPPORTED), the deduction Google APIs took on 17 October and 1 November and Gemini Embedding and Gemini Live carry (15 of 30). Terms (effective 23 March 2026, re-read 1 November) say free-tier prompts and responses are used to improve Google products and human reviewers may read them, paid tier isn't used (10 of 20). Abuse monitoring on paid services is kept 'a limited period' with no number, grounding data 30 days, and since 26 October new paid projects store Generate Content requests by default unless `store=false`. No zero-retention route on this API was found (5 of 15). Request logs in AI Studio for billed projects (15). security.txt on google.com valid to 2030-04-01 with a vulnerability reward programme, re-read on 1 November. No certification naming the Developer API found, the reading Gemini Embedding takes (5 of 20)."
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        "a": "no",
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        "b": "Apache-2.0 (SDKs)",
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        "b": "2026-10-01",
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        "b": "yes",
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        "a": "yes",
        "b": "yes",
        "name": "Terms restrict benchmarking"
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        "b": "not found in the text",
        "name": "Terms or service can change without notice"
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        "a": "not found in the text",
        "b": "not found in the text",
        "name": "Arbitration or class-action waiver"
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        "b": "4k stars",
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        "question": "Which is better for AI agents, Gemini 4 Carbon or Gemini Developer API?"
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        "answer": "Both need an API key.",
        "question": "Do Gemini 4 Carbon and Gemini Developer API need an API key?"
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      {
        "answer": "Yes. Gemini 4 Carbon has a hosted endpoint at https://generativelanguage.googleapis.com/v1beta and Gemini Developer API at https://generativelanguage.googleapis.com/v1beta.",
        "question": "Can an agent call Gemini 4 Carbon and Gemini Developer API without installing anything?"
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        "slug": "gemini-4-carbon",
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          "Payments \u0026 pricing, 40 against 20"
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          "Free to start without a card"
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        "goodFor": "Cheap, long-context Flash calls for prototypes, public data and agents that need to start without a card, and Gemini 4 Argon for long reasoning on the paid tier.",
        "slug": "gemini-api",
        "watchFor": "Free-tier prompts and responses improve Google products and may be read by human reviewers"
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        "json": "https://www.anchorterminal.com/compare/cloudflare-ai-gateway-vs-gemini-api.json",
        "title": "Cloudflare AI Gateway vs Gemini Developer API",
        "url": "https://www.anchorterminal.com/compare/cloudflare-ai-gateway-vs-gemini-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-gemini-4-carbon.json",
        "title": "Cloudflare Workers AI vs Gemini 4 Carbon",
        "url": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-gemini-4-carbon"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-gemini-api.json",
        "title": "Cloudflare Workers AI vs Gemini Developer API",
        "url": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-gemini-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cohere-chat-vs-gemini-4-carbon.json",
        "title": "Cohere Chat API (Command models) vs Gemini 4 Carbon",
        "url": "https://www.anchorterminal.com/compare/cohere-chat-vs-gemini-4-carbon"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cohere-chat-vs-gemini-api.json",
        "title": "Cohere Chat API (Command models) vs Gemini Developer API",
        "url": "https://www.anchorterminal.com/compare/cohere-chat-vs-gemini-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/deepinfra-vs-gemini-4-carbon.json",
        "title": "DeepInfra vs Gemini 4 Carbon",
        "url": "https://www.anchorterminal.com/compare/deepinfra-vs-gemini-4-carbon"
      },
      {
        "json": "https://www.anchorterminal.com/compare/deepinfra-vs-gemini-api.json",
        "title": "DeepInfra vs Gemini Developer API",
        "url": "https://www.anchorterminal.com/compare/deepinfra-vs-gemini-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/deepseek-api-vs-gemini-4-carbon.json",
        "title": "DeepSeek API vs Gemini 4 Carbon",
        "url": "https://www.anchorterminal.com/compare/deepseek-api-vs-gemini-4-carbon"
      },
      {
        "json": "https://www.anchorterminal.com/compare/deepseek-api-vs-gemini-api.json",
        "title": "DeepSeek API vs Gemini Developer API",
        "url": "https://www.anchorterminal.com/compare/deepseek-api-vs-gemini-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/eden-ai-vs-gemini-4-carbon.json",
        "title": "Eden AI vs Gemini 4 Carbon",
        "url": "https://www.anchorterminal.com/compare/eden-ai-vs-gemini-4-carbon"
      },
      {
        "json": "https://www.anchorterminal.com/compare/eden-ai-vs-gemini-api.json",
        "title": "Eden AI vs Gemini Developer API",
        "url": "https://www.anchorterminal.com/compare/eden-ai-vs-gemini-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/elorian-glimpse-vs-gemini-4-carbon.json",
        "title": "Glimpse vs Gemini 4 Carbon",
        "url": "https://www.anchorterminal.com/compare/elorian-glimpse-vs-gemini-4-carbon"
      },
      {
        "json": "https://www.anchorterminal.com/compare/elorian-glimpse-vs-gemini-api.json",
        "title": "Glimpse vs Gemini Developer API",
        "url": "https://www.anchorterminal.com/compare/elorian-glimpse-vs-gemini-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/fireworks-inference-vs-gemini-4-carbon.json",
        "title": "Fireworks AI Inference vs Gemini 4 Carbon",
        "url": "https://www.anchorterminal.com/compare/fireworks-inference-vs-gemini-4-carbon"
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      {
        "json": "https://www.anchorterminal.com/compare/fireworks-inference-vs-gemini-api.json",
        "title": "Fireworks AI Inference vs Gemini Developer API",
        "url": "https://www.anchorterminal.com/compare/fireworks-inference-vs-gemini-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-groq.json",
        "title": "Gemini 4 Carbon vs GroqCloud",
        "url": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-groq"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-hugging-face-inference-providers.json",
        "title": "Gemini 4 Carbon vs Hugging Face Inference Providers",
        "url": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-hugging-face-inference-providers"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-inkling-2-small.json",
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        "url": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-inkling-2-small"
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      {
        "json": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-jais-3.json",
        "title": "Gemini 4 Carbon vs Jais 3",
        "url": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-jais-3"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-meta-model-api.json",
        "title": "Gemini 4 Carbon vs Meta Model API",
        "url": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-meta-model-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-minimax-api.json",
        "title": "Gemini 4 Carbon vs MiniMax API",
        "url": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-minimax-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-mistral-api.json",
        "title": "Gemini 4 Carbon vs Mistral AI API",
        "url": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-mistral-api"
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      {
        "json": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-muse-ember.json",
        "title": "Gemini 4 Carbon vs Muse Ember",
        "url": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-muse-ember"
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      {
        "json": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-muse-spark-open.json",
        "title": "Gemini 4 Carbon vs Muse Spark Open",
        "url": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-muse-spark-open"
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      {
        "json": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-nemotron-3-5-super-vl.json",
        "title": "Gemini 4 Carbon vs Nemotron 3.5 Super VL",
        "url": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-nemotron-3-5-super-vl"
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      {
        "json": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-novita-ai.json",
        "title": "Gemini 4 Carbon vs Novita AI",
        "url": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-novita-ai"
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      {
        "json": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-openai-api.json",
        "title": "Gemini 4 Carbon vs OpenAI API",
        "url": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-openai-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-openrouter.json",
        "title": "Gemini 4 Carbon vs OpenRouter",
        "url": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-openrouter"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-prism-inference.json",
        "title": "Gemini 4 Carbon vs Prism Inference",
        "url": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-prism-inference"
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      {
        "json": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-ramp-router.json",
        "title": "Gemini 4 Carbon vs Router.com (Ramp Router)",
        "url": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-ramp-router"
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      {
        "json": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-reflection-beam.json",
        "title": "Gemini 4 Carbon vs Beam 1.0",
        "url": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-reflection-beam"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-routerplus.json",
        "title": "Gemini 4 Carbon vs RouterPlus",
        "url": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-routerplus"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-sambanova.json",
        "title": "Gemini 4 Carbon vs SambaCloud",
        "url": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-sambanova"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-siliconflow.json",
        "title": "Gemini 4 Carbon vs SiliconFlow",
        "url": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-siliconflow"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-simplismart.json",
        "title": "Gemini 4 Carbon vs Simplismart",
        "url": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-simplismart"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-stepfun-api.json",
        "title": "Gemini 4 Carbon vs StepFun API",
        "url": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-stepfun-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-swe-2-flash.json",
        "title": "Gemini 4 Carbon vs SWE-2 Flash",
        "url": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-swe-2-flash"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-tencent-tokenhub.json",
        "title": "Gemini 4 Carbon vs Tencent Cloud TokenHub",
        "url": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-tencent-tokenhub"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-together-inference.json",
        "title": "Gemini 4 Carbon vs Together AI Inference",
        "url": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-together-inference"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-vercel-ai-gateway.json",
        "title": "Gemini 4 Carbon vs Vercel AI Gateway",
        "url": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-vercel-ai-gateway"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-vertex-ai.json",
        "title": "Gemini 4 Carbon vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-xai-api.json",
        "title": "Gemini 4 Carbon vs xAI API (Grok)",
        "url": "https://www.anchorterminal.com/compare/gemini-4-carbon-vs-xai-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-api-vs-groq.json",
        "title": "Gemini Developer API vs GroqCloud",
        "url": "https://www.anchorterminal.com/compare/gemini-api-vs-groq"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-api-vs-hugging-face-inference-providers.json",
        "title": "Gemini Developer API vs Hugging Face Inference Providers",
        "url": "https://www.anchorterminal.com/compare/gemini-api-vs-hugging-face-inference-providers"
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      {
        "json": "https://www.anchorterminal.com/compare/gemini-api-vs-inkling-2-small.json",
        "title": "Gemini Developer API vs Inkling 2 Small",
        "url": "https://www.anchorterminal.com/compare/gemini-api-vs-inkling-2-small"
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      {
        "json": "https://www.anchorterminal.com/compare/gemini-api-vs-jais-3.json",
        "title": "Gemini Developer API vs Jais 3",
        "url": "https://www.anchorterminal.com/compare/gemini-api-vs-jais-3"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-api-vs-meta-model-api.json",
        "title": "Gemini Developer API vs Meta Model API",
        "url": "https://www.anchorterminal.com/compare/gemini-api-vs-meta-model-api"
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      {
        "json": "https://www.anchorterminal.com/compare/gemini-api-vs-minimax-api.json",
        "title": "Gemini Developer API vs MiniMax API",
        "url": "https://www.anchorterminal.com/compare/gemini-api-vs-minimax-api"
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      {
        "json": "https://www.anchorterminal.com/compare/gemini-api-vs-mistral-api.json",
        "title": "Gemini Developer API vs Mistral AI API",
        "url": "https://www.anchorterminal.com/compare/gemini-api-vs-mistral-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-api-vs-muse-ember.json",
        "title": "Gemini Developer API vs Muse Ember",
        "url": "https://www.anchorterminal.com/compare/gemini-api-vs-muse-ember"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-api-vs-muse-spark-open.json",
        "title": "Gemini Developer API vs Muse Spark Open",
        "url": "https://www.anchorterminal.com/compare/gemini-api-vs-muse-spark-open"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-api-vs-nemotron-3-5-super-vl.json",
        "title": "Gemini Developer API vs Nemotron 3.5 Super VL",
        "url": "https://www.anchorterminal.com/compare/gemini-api-vs-nemotron-3-5-super-vl"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-api-vs-novita-ai.json",
        "title": "Gemini Developer API vs Novita AI",
        "url": "https://www.anchorterminal.com/compare/gemini-api-vs-novita-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-api-vs-openai-api.json",
        "title": "Gemini Developer API vs OpenAI API",
        "url": "https://www.anchorterminal.com/compare/gemini-api-vs-openai-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-api-vs-openrouter.json",
        "title": "Gemini Developer API vs OpenRouter",
        "url": "https://www.anchorterminal.com/compare/gemini-api-vs-openrouter"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-api-vs-prism-inference.json",
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        "json": "https://www.anchorterminal.com/compare/gemini-api-vs-ramp-router.json",
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        "url": "https://www.anchorterminal.com/compare/gemini-api-vs-ramp-router"
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        "json": "https://www.anchorterminal.com/compare/gemini-api-vs-reflection-beam.json",
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        "json": "https://www.anchorterminal.com/compare/gemini-api-vs-routerplus.json",
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        "url": "https://www.anchorterminal.com/compare/gemini-api-vs-routerplus"
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        "json": "https://www.anchorterminal.com/compare/gemini-api-vs-sambanova.json",
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        "url": "https://www.anchorterminal.com/compare/gemini-api-vs-sambanova"
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      {
        "json": "https://www.anchorterminal.com/compare/gemini-api-vs-siliconflow.json",
        "title": "Gemini Developer API vs SiliconFlow",
        "url": "https://www.anchorterminal.com/compare/gemini-api-vs-siliconflow"
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      {
        "json": "https://www.anchorterminal.com/compare/gemini-api-vs-simplismart.json",
        "title": "Gemini Developer API vs Simplismart",
        "url": "https://www.anchorterminal.com/compare/gemini-api-vs-simplismart"
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      {
        "json": "https://www.anchorterminal.com/compare/gemini-api-vs-stepfun-api.json",
        "title": "Gemini Developer API vs StepFun API",
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      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-api-vs-swe-2-flash.json",
        "title": "Gemini Developer API vs SWE-2 Flash",
        "url": "https://www.anchorterminal.com/compare/gemini-api-vs-swe-2-flash"
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      {
        "json": "https://www.anchorterminal.com/compare/gemini-api-vs-tencent-tokenhub.json",
        "title": "Gemini Developer API vs Tencent Cloud TokenHub",
        "url": "https://www.anchorterminal.com/compare/gemini-api-vs-tencent-tokenhub"
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      {
        "json": "https://www.anchorterminal.com/compare/gemini-api-vs-together-inference.json",
        "title": "Gemini Developer API vs Together AI Inference",
        "url": "https://www.anchorterminal.com/compare/gemini-api-vs-together-inference"
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      {
        "json": "https://www.anchorterminal.com/compare/gemini-api-vs-vercel-ai-gateway.json",
        "title": "Gemini Developer API vs Vercel AI Gateway",
        "url": "https://www.anchorterminal.com/compare/gemini-api-vs-vercel-ai-gateway"
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        "json": "https://www.anchorterminal.com/compare/gemini-api-vs-vertex-ai.json",
        "title": "Gemini Developer API vs Vertex AI (Gemini Enterprise Agent Platform)",
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        "json": "https://www.anchorterminal.com/compare/gemini-api-vs-xai-api.json",
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    "panel": null,
    "scores": [
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        "by": 5,
        "edge": "gemini-api",
        "gemini-4-carbon": 40,
        "gemini-api": 45,
        "key": "reliability",
        "name": "Reliability",
        "weight": 16
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
      },
      {
        "by": 0,
        "edge": "",
        "gemini-4-carbon": 85,
        "gemini-api": 85,
        "key": "schema",
        "name": "Schema \u0026 documentation",
        "weight": 13
      },
      {
        "by": 0,
        "edge": "",
        "gemini-4-carbon": 93,
        "gemini-api": 93,
        "key": "ergonomics",
        "name": "Agent ergonomics",
        "weight": 13
      },
      {
        "by": 5,
        "edge": "gemini-4-carbon",
        "gemini-4-carbon": 55,
        "gemini-api": 50,
        "key": "security",
        "name": "Security \u0026 auth",
        "weight": 14
      },
      {
        "by": 20,
        "edge": "gemini-api",
        "gemini-4-carbon": 20,
        "gemini-api": 40,
        "key": "payments",
        "name": "Payments \u0026 pricing",
        "weight": 10
      },
      {
        "key": "tasks",
        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "by": 0,
        "edge": "",
        "gemini-4-carbon": 83,
        "gemini-api": 83,
        "key": "maintenance",
        "name": "Maintenance \u0026 community",
        "weight": 7
      },
      {
        "by": 0,
        "edge": "",
        "gemini-4-carbon": 72,
        "gemini-api": 72,
        "key": "transparency",
        "name": "Transparency \u0026 trust",
        "weight": 7
      }
    ],
    "summary": "Gemini 4 Carbon and Gemini Developer API score within a point of each other on agent readiness, 62.6 (B) and 62.2 (B). Gemini Developer API leads on reliability and payments \u0026 pricing. Both do llm inference.",
    "tasks": null,
    "tutorials": [],
    "verdicts": {
      "gemini-4-carbon": "Google's strongest model on the same Gemini API as Argon, with a 1M-token budget, function calling and structured output, at an introductory $2 and $10 per million tokens. Paid tier only, sampling parameters are ignored or refused, its launch stage isn't stated, and the price rises to $4 and $20 at a date Google hasn't given.",
      "gemini-api": "Free tier on 3.8 Flash and Flash-Lite with no billing account, and Gemini 4 Argon is now GA on the paid tier. Free-tier prompts and responses improve Google products and may be read by human reviewers, and the API accepts an OAuth token in the URL query string."
    }
  },
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  "links": {
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  "markdown": "Gemini 4 Carbon and Gemini Developer API score within a point of each other on agent readiness, 62.6 (B) and 62.2 (B). Gemini Developer API leads on reliability and payments \u0026 pricing. Both do llm inference.\n\n- Gemini 4 Carbon: grade B, 62.6/100, rank #555 of 1518. Markdown https://www.anchorterminal.com/tools/gemini-4-carbon.md · JSON https://www.anchorterminal.com/api/v1/tools/gemini-4-carbon.json\n- Gemini Developer API: grade B, 62.2/100, rank #571 of 1518. Markdown https://www.anchorterminal.com/tools/gemini-api.md · JSON https://www.anchorterminal.com/api/v1/tools/gemini-api.json\n- Best model APIs and inference for AI agents: https://www.anchorterminal.com/best/inference/index.md\n- All 1000 models comparisons: https://www.anchorterminal.com/compare/inference/index.md\n\n## Which one, for what\n\n### Gemini 4 Carbon (B)\n\nGood for: Agents on the hardest long tasks (multi-step debugging, large codebases, open-ended research, security work) that can pay frontier prices and already use the Gemini API.\n\nAhead on:\n- Security \u0026 auth, 55 against 50\n\nAlso in its favour:\n- No incidents deducted, where Gemini Developer API loses 3 points for them\n\nWatch for: Paid tier only, with no free tier to try it on\n\n### Gemini Developer API (B)\n\nGood for: Cheap, long-context Flash calls for prototypes, public data and agents that need to start without a card, and Gemini 4 Argon for long reasoning on the paid tier.\n\nAhead on:\n- Reliability, 45 against 40\n- Payments \u0026 pricing, 40 against 20\n\nAlso in its favour:\n- Free to start without a card\n\nWatch for: Free-tier prompts and responses improve Google products and may be read by human reviewers\n\n\n## Why the edge\n\n### Payments \u0026 pricing: Gemini Developer API +20\n\n- Gemini 4 Carbon (20): Model reading for gemini-4-carbon on the Gemini API. Platform facts are the Gemini API listing's (gemini-api, re-read 1 November), carried over as RULES.md allows for a model on an already graded platform. No machine payment protocol (0). Introductory prices published in Google's 28 October announcement without a login, $2 and $10, then $4 and $20; the Gemini API pricing page as read on 10 November showed no Carbon row, so the figures rest on the announcement (20). No free tier: Google's developer post puts Carbon on the paid tier (0). A Google account and AI Studio for a key (0). 0 + 20 + 0 + 0 = 20.\n- Gemini Developer API (40): No machine payment protocol (0). Per-token prices published without a login, re-read on 1 November (20). Free tier on 3.8 Flash, 3.6 Flash, 3.5 Flash-Lite and 3.1 Flash-Lite, not on `gemini-4-argon` or 3.1 Pro preview, and the rate-limits page needs only an active project for the free tier and a linked billing account from Tier 1, so the free tier needs no card (20). A Google account and AI Studio are needed for a key (0).\n\n### Reliability: Gemini Developer API +5\n\n- Gemini 4 Carbon (40): Model reading for gemini-4-carbon on the Gemini API. Platform facts are the Gemini API listing's (gemini-api, re-read 1 November), carried over as RULES.md allows for a model on an already graded platform. Status page at aistudio.google.com/status with no readable components or history (10 of 20) and no readable incident record (5 of 30). Rate-limit tiers and spend limits published, per-model limits in AI Studio (5 of 15). Backoff guidance for 429 and 503 and SDK retries (15). No SLA (0). Carbon's launch stage isn't stated in Google's developer post, the Antigravity post or the Cloud developer guide read on 10 November, and the model ID carries no preview label, so half (5 of 10, a judgement call; Argon's GA earned the platform 10). 10 + 5 + 5 + 15 + 0 + 5 = 40.\n- Gemini Developer API (45): Status page at aistudio.google.com/status (robots.txt allows it), but on 1 November it still returned a script shell titled Google AI Studio with no components or history, so 10 of 20, and 5 of 30 for the incident line with no readable record, as the Gemini Live and Gemini Embedding listings read the same page. Google Cloud's status dashboard covers Vertex AI products, not this endpoint. Per-model RPM and TPM live in AI Studio. The public rate-limits page, re-read on 1 November, publishes tier rules, spend-based limits of $10, $50 and $200 per 10 minutes for Tiers 1 to 3, and batch queue limits (5 of 15). The troubleshooting page, re-read on 1 November, gives exponential backoff with jitter for 429 RESOURCE_EXHAUSTED and 503 UNAVAILABLE, says to retry 429, 408 and 5xx and not 400, 402 or 403, and says the Python SDK retries transient errors up to four times (15). No SLA found for the Developer API (0). The flagship `gemini-4-argon` went GA on 13 October 2026 and the default 3.8 Flash is GA, and the Interactions API the guides lead with has been Generally Available since June 2026. The listing's example and the SDKs default to the `v1beta` path, which Google labels beta, but the API versions page, read on 1 November, says the stable `v1` path carries the Interactions API, generateContent, function calling and structured output and supports every model, so the surface is available as GA, the reading Gemini Embedding takes on the same endpoint. Gemini Live keeps a deduction because the Live API runs on `v1beta` only (10). Before 13 October the only Pro model was `gemini-3.1-pro-preview` (5 of 10).\n\n### Security \u0026 auth: Gemini 4 Carbon +5\n\n- Gemini 4 Carbon (55): Model reading for gemini-4-carbon on the Gemini API. Platform facts are the Gemini API listing's (gemini-api, re-read 1 November), carried over as RULES.md allows for a model on an already graded platform. Keys bound to a service account and restricted to the Gemini API, with no scopes and a token accepted in the URL (15 of 30, the platform's deduction). Carbon is on the paid tier only, and Google's terms say paid-tier content isn't used to improve products; AI Studio use under a Google AI Ultra subscription falls under terms we didn't read, so 15 of 20 (a judgement call; the platform's 10 is for its free tier). Abuse retention with no number, and new paid projects store requests by default since 26 October (5 of 15). Request logs for billed projects (15). security.txt and a reward programme, no certification naming the API (5 of 20). 15 + 15 + 5 + 15 + 5 = 55.\n- Gemini Developer API (50): Model reading. Keys live in a Cloud project. Since 28 May 2026 new keys are authorisation keys bound to a service account and restricted to the Gemini API, keys can be limited by IP or origin, unrestricted standard keys are rejected, and the docs give a leak checklist, per the API key page re-read on 1 November. No permission scopes, so 25 of 30, less 10 because the API reads a token from the URL. The Discovery document (revision 20261101) lists `access_token`, `oauth_token` and `key` as query parameters, and on 1 November a generateContent request with no credential answered 403 'Method doesn't allow unregistered callers' while one with a made-up `?access_token=` answered 401 'Request had invalid authentication credentials' (ACCESS_TOKEN_TYPE_UNSUPPORTED), the deduction Google APIs took on 17 October and 1 November and Gemini Embedding and Gemini Live carry (15 of 30). Terms (effective 23 March 2026, re-read 1 November) say free-tier prompts and responses are used to improve Google products and human reviewers may read them, paid tier isn't used (10 of 20). Abuse monitoring on paid services is kept 'a limited period' with no number, grounding data 30 days, and since 26 October new paid projects store Generate Content requests by default unless `store=false`. No zero-retention route on this API was found (5 of 15). Request logs in AI Studio for billed projects (15). security.txt on google.com valid to 2030-04-01 with a vulnerability reward programme, re-read on 1 November. No certification naming the Developer API found, the reading Gemini Embedding takes (5 of 20).\n\n## Score by category\n\n| Category | Weight | Gemini 4 Carbon | Gemini Developer API | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 40 | 45 | Gemini Developer API +5 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 85 | 85 | even |\n| Agent ergonomics | 13% (16.2 this run) | 93 | 93 | even |\n| Security \u0026 auth | 14% (17.5 this run) | 55 | 50 | Gemini 4 Carbon +5 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 20 | 40 | Gemini Developer API +20 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 83 | 83 | even |\n| Transparency \u0026 trust | 7% (8.8 this run) | 72 | 72 | even |\n| Negative events | ≤15 | 0 | -3 | |\n| **Total** | | **62.6 · B** | **62.2 · B** | |\n\n## Facts side by side\n\n| Fact | Gemini 4 Carbon | Gemini Developer API |\n| --- | --- | --- |\n| Kind | Model API | Model API |\n| Vendor | Google | Google |\n| Hosted endpoint | `https://generativelanguage.googleapis.com/v1beta` | `https://generativelanguage.googleapis.com/v1beta` |\n| Transports |  | HTTP |\n| Auth | API key | API key |\n| Pricing | Pay per use | Freemium |\n| x402 | no | no |\n| Licence | Closed model, used through the Gemini API and Google's apps under Google's terms | Apache-2.0 (SDKs) |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-11-10 | 2026-10-30 |\n| Terms last updated | 2026-04-28 | 2026-04-28 |\n| Privacy policy last updated | 2026-10-01 | 2026-10-01 |\n| Customer content may train models | yes | yes |\n| Terms restrict automated access | yes | yes |\n| Terms restrict benchmarking | yes | yes |\n| Terms or service can change without notice | not found in the text | not found in the text |\n| Arbitration or class-action waiver | not found in the text | not found in the text |\n| Popularity | none | 4k stars |\n| Agent reviews | none | 3.5/5 (2) |\n\n## How the scores have moved\n\n### Gemini 4 Carbon\n\nNo score change since it was listed.\n\n### Gemini Developer API\n\n- -3.3 on 1 November 2026: product, new evidence, correction\n- -0.1 on 28 October 2026: correction\n- +0.1 on 28 October 2026: checklist\n\n## Verdicts\n\n**Gemini 4 Carbon.** Google's strongest model on the same Gemini API as Argon, with a 1M-token budget, function calling and structured output, at an introductory $2 and $10 per million tokens. Paid tier only, sampling parameters are ignored or refused, its launch stage isn't stated, and the price rises to $4 and $20 at a date Google hasn't given.\n\n**Gemini Developer API.** Free tier on 3.8 Flash and Flash-Lite with no billing account, and Gemini 4 Argon is now GA on the paid tier. Free-tier prompts and responses improve Google products and may be read by human reviewers, and the API accepts an OAuth token in the URL query string.\n\n## Before you call either\n\n### Gemini 4 Carbon\n\n1. Call generateContent at https://generativelanguage.googleapis.com/v1beta with model gemini-4-carbon and an x-goog-api-key on a billed project\n2. Set thinking_level (LOW, MEDIUM or HIGH) instead of thinking_budget, and don't send temperature, top_p or top_k\n3. Count output against the same 1,048,576-token limit as the input, and set max_output_tokens for long answers\n4. Put static prompt content first so implicit caching applies; explicit caches aren't supported\n5. Use gemini-4-argon for most coding and knowledge work, and Carbon for the hardest long tasks, as Google suggests\n\n### Gemini Developer API\n\n1. Never send customer data through a free-tier key. Link billing first\n2. Send keys in the `x-goog-api-key` header, never as `key` or `access_token` in the URL\n3. Back off exponentially on 429 RESOURCE_EXHAUSTED and 503, and don't retry 400, 402 or 403\n4. Remove temperature, top_p and top_k. Gemini 4 and 3.6+ ignore them and a future release returns 400\n5. On `gemini-4-argon`, set max_output_tokens to at least 32,768 and client timeouts to 15 minutes, or use background execution\n\n## Questions\n\n### Which is better for AI agents, Gemini 4 Carbon or Gemini Developer API?\n\nGemini 4 Carbon and Gemini Developer API score within a point of each other on agent readiness, 62.6 (B) and 62.2 (B). Gemini Developer API leads on reliability and payments \u0026 pricing.\n\n### Do Gemini 4 Carbon and Gemini Developer API need an API key?\n\nBoth need an API key.\n\n### Can an agent call Gemini 4 Carbon and Gemini Developer API without installing anything?\n\nYes. Gemini 4 Carbon has a hosted endpoint at https://generativelanguage.googleapis.com/v1beta and Gemini Developer API at https://generativelanguage.googleapis.com/v1beta.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/gemini-4-carbon-vs-gemini-api.json, and with the fewest tokens: https://www.anchorterminal.com/compare/gemini-4-carbon-vs-gemini-api.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"gemini-4-carbon\", \"b\": \"gemini-api\"}`. From a terminal: `anchor compare gemini-4-carbon gemini-api`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/gemini-4-carbon.json and https://www.anchorterminal.com/api/v1/tools/gemini-api.json\n\n## Other comparisons with Gemini 4 Carbon or Gemini Developer API\n\n- [Amazon Bedrock vs Gemini 4 Carbon](https://www.anchorterminal.com/compare/amazon-bedrock-vs-gemini-4-carbon.md)\n- [Amazon Bedrock vs Gemini Developer API](https://www.anchorterminal.com/compare/amazon-bedrock-vs-gemini-api.md)\n- [Claude API vs Gemini 4 Carbon](https://www.anchorterminal.com/compare/anthropic-api-vs-gemini-4-carbon.md)\n- [Claude API vs Gemini Developer API](https://www.anchorterminal.com/compare/anthropic-api-vs-gemini-api.md)\n- [Antseed vs Gemini 4 Carbon](https://www.anchorterminal.com/compare/antseed-vs-gemini-4-carbon.md)\n- [Antseed vs Gemini Developer API](https://www.anchorterminal.com/compare/antseed-vs-gemini-api.md)\n- [Azure OpenAI in Foundry Models vs Gemini 4 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    "description": "Gemini 4 Carbon and Gemini Developer score within a point of each other for llm inference, 62.6 and 62.2 out of 100. Prices, MCP, x402, uptime and agent notes side by side.",
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    "title": "Gemini 4 Carbon vs Gemini Developer for AI agents (2026)",
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