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        "run": "2026-10-01",
        "scores": {
          "ergonomics": 97,
          "maintenance": 91,
          "payments": 40,
          "reliability": 99,
          "schema": 94,
          "security": 97,
          "transparency": 90
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-11-06"
        },
        "negative": 0,
        "verdict": "Gemini, Claude and open models through one Google Cloud API with IAM, regional endpoints, schema-guaranteed JSON and a 99.5 per cent SLA, and no Vertex incident on the Cloud status page in the 90 days to 6 November 2026. Gemini 4 Argon and 3.8 Flash have 12-month availability, but short-term Flash models get a 95 per cent SLA.",
        "bestFor": "Google Cloud customers who need Gemini with residency, VPC-SC, provisioned throughput and an SLA, or Claude under a Google bill.",
        "strengths": [
          "No incident naming Vertex or Gemini on status.cloud.google.com between 8 July and 6 October 2026",
          "Public discovery document for the v1 API (revision 20260930) with 1,128 methods and 1,493 schemas",
          "JSON output follows a supplied `response_schema` when `response_mime_type` is `application/json`",
          "Express mode gives new users 90 days free with an API key and no billing details",
          "Only requests that return 200 are charged",
          "Gemini 4 Argon, GA since 13 October 2026, has a 1,048,576-token unified limit at $4/$20 per million tokens"
        ],
        "weaknesses": [
          "The SLA drops from 99.5 to 95 per cent for short-term availability models, Gemini 3.7 and 3.6 Flash among them",
          "Gemini 3.6 Flash, released 21 July 2026, retires on 19 November 2026, and 3.7 Flash on 28 January 2027",
          "Zero retention needs an exception request, and flagged prompts may be kept up to 90 days",
          "The Interactions API stores prompts and responses unless `store` is set to false",
          "No llms.txt on the docs site, and the docs mix the Vertex AI and Agent Platform names",
          "The model versions table still listed Gemini 2.5 Pro, Flash and Flash-Lite as available after their 20 October 2026 retirement date"
        ],
        "agentNotes": [
          "Call the `global` location on aiplatform.googleapis.com unless data residency requires a Region. The 429 guide says it spreads load and reduces errors",
          "Back off exponentially on 429 `Resource exhausted`. On Standard PayGo it means shared capacity is busy, not a fixed quota",
          "Send `response_schema` with `response_mime_type: application/json`. JSON mode alone doesn't guarantee valid output",
          "Set `store` to false on Interactions API calls. It defaults to true and keeps prompts and responses",
          "Pin `gemini-4-argon` or `gemini-3.8-flash`, both in the 12-month tier, rather than 3.7 or 3.6 Flash, which retire on 28 January 2027 and 19 November 2026"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 0,
        "avgRating": 0,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "AA",
            "methodology": "0.7",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 88.7
          }
        ],
        "editorialScores": {
          "ergonomics": 97,
          "maintenance": 91,
          "payments": 40,
          "reliability": 99,
          "schema": 94,
          "security": 97,
          "transparency": 83
        },
        "provenanceScore": 97,
        "checked": {
          "categories": {
            "ergonomics": "2026-11-06",
            "maintenance": "2026-11-06",
            "payments": "2026-11-06",
            "reliability": "2026-11-06",
            "schema": "2026-11-06",
            "security": "2026-11-06",
            "transparency": "2026-11-06"
          },
          "last": "2026-11-06",
          "oldest": "2026-11-06",
          "stale": false,
          "staleAfterDays": 90
        }
      },
      "connect": {
        "install": "pip install google-genai   # or: npm i @google/genai",
        "http": "curl -X POST \\\n  -H \"Content-Type: application/json\" \\\n  -H \"Authorization: Bearer $(gcloud auth print-access-token)\" \\\n  \"https://aiplatform.googleapis.com/v1/projects/${GOOGLE_CLOUD_PROJECT}/locations/global/publishers/google/models/gemini-3.8-flash:generateContent\" \\\n  -d '{\"contents\":{\"role\":\"user\",\"parts\":{\"text\":\"Explain how AI works in a few words\"}}}'"
      },
      "letme": {
        "capability": "https://letme.dev/inference.llm",
        "tool": "https://letme.dev/vertex-ai"
      },
      "sameCompany": [
        "gemini-api",
        "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"
      ],
      "area": "models",
      "unitPrices": [
        {
          "item": "Grounding with Google Search over 5,000 a month (Gemini 3)",
          "unit": "1k-requests",
          "usd": 14
        }
      ],
      "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://cloud.google.com/terms",
        "privacy": "https://policies.google.com/privacy",
        "statusPage": "https://status.cloud.google.com",
        "changelog": "https://docs.cloud.google.com/gemini-enterprise-agent-platform/release-notes",
        "securityTxt": "valid",
        "checked": "2026-11-06",
        "notes": [
          "The product runs under the Google Cloud Platform terms, whose contracting Google entity depends on the billing country, as for vertex-ai-tuning.",
          "www.google.com/.well-known/security.txt expires on 2030-04-01 (read 2026-11-06).",
          "docs.cloud.google.com has no llms.txt (404 on 6 October 2026), but each docs page answers as Markdown when `.md.txt` is added to its URL."
        ],
        "score": 97
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/vertex-ai.json",
      "live": {
        "slug": "vertex-ai",
        "probe": {
          "target": "https://aiplatform.googleapis.com/v1",
          "method": "get",
          "lastAt": "2026-11-07T18:21:03.779025658Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 763,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 118,
          "p95ms24h": 752,
          "samples24h": 200,
          "samples30d": 200,
          "days": [
            {
              "date": "2026-11-06",
              "probes": 13,
              "ok": 13
            },
            {
              "date": "2026-11-07",
              "probes": 187,
              "ok": 187
            }
          ]
        },
        "versions": [
          {
            "registry": "github",
            "name": "googleapis/python-genai",
            "version": "v3.0.0",
            "released": "2026-11-06",
            "seenAt": "2026-11-07T00:15:33.519504561Z"
          },
          {
            "registry": "npm",
            "name": "@google/genai",
            "version": "3.0.0",
            "seenAt": "2026-11-07T00:15:31.639429892Z"
          },
          {
            "registry": "pypi",
            "name": "google-cloud-aiplatform",
            "version": "2.7.0",
            "released": "2026-10-28",
            "seenAt": "2026-11-07T00:15:32.521225598Z"
          },
          {
            "registry": "pypi",
            "name": "google-genai",
            "version": "3.0.0",
            "released": "2026-11-06",
            "seenAt": "2026-11-07T00:15:31.485691571Z"
          }
        ],
        "githubStars": 4057,
        "npmWeekly": 31989360,
        "pypiWeekly": 38431674,
        "securityTxt": {
          "url": "https://google.com/.well-known/security.txt",
          "state": "valid",
          "expires": "2030-04-01T00:00:00z",
          "checkedAt": "2026-11-07T16:01:22.068349931Z"
        },
        "pages": [
          {
            "url": "https://cloud.google.com/gemini-enterprise-agent-platform/generative-ai/pricing",
            "kind": "deprecations",
            "status": 200,
            "checkedAt": "2026-11-07T14:01:16.257808105Z",
            "changedAt": "2026-11-07T14:01:16.257808105Z",
            "fingerprint": "a4fe253bd23f"
          }
        ],
        "updatedAt": "2026-11-07T18:21:03.779025658Z"
      }
    },
    "edges": [
      {
        "by": 24,
        "category": "reliability",
        "leads": "vertex-ai",
        "name": "Reliability",
        "reasons": {
          "a": "Status page at status.openai.com with component history (20). Two API-wide majors in the 90 days to 1 November, elevated errors across ChatGPT, Codex and the API (the Agents API included) on 29 September, with Chat Completions, Responses, Batch, Realtime, Embeddings, Images, Files and the other API components degraded from 17:52 to 23:14 UTC, and elevated error rates across API models on 17 September, with eleven components degraded from 20:20 to 21:20 UTC. Two majors give 5 of 30. The 25 July incident is now outside the window. The 29 September write-up, posted on 6 October, traces it to a feature rollout that exhausted shared network connection capacity. Every other incident since 3 August that lists an API component is partial or under an hour, so minor. Degraded performance across ChatGPT, Codex and the APIs on 21 October listed every API component but ran 22 minutes (02:26 to 02:48 UTC). Single-model incidents were GPT-5.6 Sol errors on 11 September (09:08 to 11:21 UTC), `gpt-5.6-luna` errors on 21 October (70 minutes) and GPT-6.1 Sol degraded performance on Batch, Chat Completions and Responses on 27 October (78 minutes). Partial incidents were latency for some Responses requests on the US endpoint on 31 August and 1 September, image generation where some requests failed on 8 September, latency for some Responses and Chat Completions requests on 30 September, large-PDF errors in Responses and an Agents API computer use incident on 6 October, Responses errors for users in India, Japan and Korea on 22 October and errors on some GPT Image 2 edit requests on 30 October (14:35 to 18:36 UTC). Image model incidents on 16 September and 14 October and file download errors on 19 October each ran about 40 minutes. FedRAMP errors for Astra and Sol on 21 October and authentication errors near Illinois on 20 October list no API component. Rate limits published per tier and model family with rate-limit headers (15). 429 guidance, re-read on 1 November, covers `Retry-After` as a minimum wait, backoff with jitter when it's missing, a gradual ramp, and splits `slow_down` (429) from `server_is_overloaded` (503) (15). Scale Tier carries a 99.9% uptime SLA, through sales, per the 1 October check, not re-read on 1 November (10). Responses and Chat Completions are GA (10). 20 + 5 + 15 + 15 + 10 + 10 = 75.",
          "b": "Google Cloud status dashboard with per-product history (20). Its incident feed, read on 6 November, has no incident naming Vertex Gemini API, Gemini or the Agent Platform in the 90 days. The regional incidents of 20 August, 1 September and 20 October (europe-west2) and the Cloud Storage incident of 8 and 9 October didn't list it among affected products (30). Standard PayGo publishes usage tiers by 30-day spend with baseline throughput, 2,000,000 to 50,000,000 tokens a minute for Flash models and 500,000 to 10,000,000 for Pro, plus quota tables for other methods (15). A 429 page says to use the global endpoint and truncated exponential backoff, and a retry-strategy page (15). SLA of 99.5 per cent a month on generateContent and streamGenerateContent, 95 per cent for short-term availability models, and a latency SLO on Provisioned Throughput. The 429 page says pay-as-you-go 429s don't count toward the SLA error rate (10). Gemini 4 Argon reached GA on 13 October and Gemini 3.8 Flash moved to the 12-month tier, and the v1 API, 3.5 Flash-Lite and Claude Opus 5.5 are GA, but express mode was Preview at the 6 October check (9 of 10, up from 8). Up from 98 on 6 October."
        },
        "scores": {
          "a": 75,
          "b": 99
        }
      },
      {
        "by": 10,
        "category": "payments",
        "leads": "vertex-ai",
        "name": "Payments \u0026 pricing",
        "reasons": {
          "a": "No machine payment protocol, and the pricing page names no machine or crypto payment on 1 November (0). Per-token prices published without a login (20). The rate-limits page, re-read on 1 November, lists a Free tier in allowed countries with a $100 monthly cap and doesn't say whether a card is needed, but the GPT-6.1 Sol, GPT-6.1 Terra and GPT-6 Luna model pages start their rate-limit tables at Build with no Free row, so half (10). Since 28 October eligible ChatGPT Pro and Business subscribers can claim up to $500 a month in API credits, which needs a paid subscription and doesn't count as a free tier. Signing up and making a key need a person in a browser (0).",
          "b": "No x402, MPP or L402 (0). Per-token prices per model and option published without a login (20). Express mode gives new Google Cloud users 90 days free within quotas with no billing details, though it's in Preview and needs a @gmail.com account (20). A person signs up in the console to get the express key (0)."
        },
        "scores": {
          "a": 30,
          "b": 40
        }
      },
      {
        "by": 6,
        "category": "schema",
        "leads": "openai-api",
        "name": "Schema \u0026 documentation",
        "reasons": {
          "a": "Official OpenAPI document (openapi.yaml and openapi.json) in the openai/openai-openapi repository, whose openapi.yaml (version 2.3.0, updated 31 October) lists `gpt-6.1-terra` (25). llms.txt index with per-product files, and every docs page has a Markdown twin at `.md` (10). The reference documents each parameter, and model pages say which model fits which job (20). Structured outputs with `strict: true` on schemas and function tools (15). Error codes guide with types and recovery advice, now with a 400 `service_tier` error for tiers a project doesn't allow (15). Dated model snapshots and a dated changelog, last entry 30 October (15).",
          "b": "Model reading. Keyless discovery document for the Agent Platform API v1, revision 20260930, with 1,128 methods and 1,493 schemas (25). No llms.txt, but every docs page answers as Markdown at `.md.txt`, counted as for vertex-ai-tuning (10). Model cards give limits, capabilities and retirement dates, and the 3.8 Flash card says when to use 3.7 Flash instead, but the docs mix the Vertex AI and Agent Platform names, and the OpenAI page tells new users to call the Gemini Developer API instead (16 of 20). Structured output with `response_schema` and `response_mime_type: application/json` always follows the schema per the docs, and complex schemas fail with a 400 (15). Examples on every page and a 429 guide, but we found no full error code list for generateContent (13 of 15). Versioned v1 and v1beta1 APIs and release notes with entries on most working days, newest 5 November 2026 (15)."
        },
        "scores": {
          "a": 100,
          "b": 94
        }
      }
    ],
    "facts": [
      {
        "a": "Model API",
        "b": "Model API",
        "name": "Kind"
      },
      {
        "a": "OpenAI",
        "b": "Google Cloud",
        "name": "Vendor"
      },
      {
        "a": "https://api.openai.com/v1",
        "b": "https://aiplatform.googleapis.com/v1",
        "name": "Hosted endpoint"
      },
      {
        "a": "HTTP",
        "b": "HTTP",
        "name": "Transports"
      },
      {
        "a": "API key",
        "b": "OAuth or key",
        "name": "Auth"
      },
      {
        "a": "Pay per use",
        "b": "Pay per use",
        "name": "Pricing"
      },
      {
        "a": "no",
        "b": "no",
        "name": "x402"
      },
      {
        "a": "Apache-2.0 (SDKs)",
        "b": "Proprietary service under the Google Cloud Platform terms. Partner models carry their providers' terms. The Google Gen AI SDKs are Apache-2.0",
        "name": "Licence"
      },
      {
        "a": "no",
        "b": "no",
        "name": "Read-only variant documented"
      },
      {
        "a": "yes",
        "b": "no",
        "name": "llms.txt"
      },
      {
        "a": "2026-10-30",
        "b": "2026-11-05",
        "name": "Last release"
      },
      {
        "a": "couldn't be read",
        "b": "2026-09-02",
        "name": "Terms last updated"
      },
      {
        "a": "couldn't be read",
        "b": "2026-10-01",
        "name": "Privacy policy last updated"
      },
      {
        "a": "couldn't be read",
        "b": "yes",
        "name": "Customer content may train models"
      },
      {
        "a": "couldn't be read",
        "b": "not found in the text",
        "name": "Terms restrict automated access"
      },
      {
        "a": "couldn't be read",
        "b": "not found in the text",
        "name": "Terms restrict benchmarking"
      },
      {
        "a": "couldn't be read",
        "b": "not found in the text",
        "name": "Terms or service can change without notice"
      },
      {
        "a": "couldn't be read",
        "b": "not found in the text",
        "name": "Arbitration or class-action waiver"
      },
      {
        "a": "31k stars",
        "b": "20.9M PyPI/wk",
        "name": "Popularity"
      },
      {
        "a": "3.5/5 (8)",
        "b": "none",
        "name": "Agent reviews"
      }
    ],
    "faq": [
      {
        "answer": "Vertex AI (Gemini Enterprise Agent Platform) scores 88.7 (AA) on agent readiness against OpenAI API's 83.9 (A), and leads in 3 of 7 scored categories. OpenAI API leads on schema \u0026 documentation.",
        "question": "Which is better for AI agents, OpenAI API or Vertex AI (Gemini Enterprise Agent Platform)?"
      },
      {
        "answer": "OpenAI API needs an API key. Vertex AI (Gemini Enterprise Agent Platform) takes an API key or an OAuth sign-in.",
        "question": "Do OpenAI API and Vertex AI (Gemini Enterprise Agent Platform) need an API key?"
      },
      {
        "answer": "Yes. OpenAI API has a hosted endpoint at https://api.openai.com/v1 and Vertex AI (Gemini Enterprise Agent Platform) at https://aiplatform.googleapis.com/v1.",
        "question": "Can an agent call OpenAI API and Vertex AI (Gemini Enterprise Agent Platform) without installing anything?"
      }
    ],
    "goodFor": [
      {
        "aheadOn": [
          "Schema \u0026 documentation, 100 against 94"
        ],
        "also": null,
        "goodFor": "Agents that want one vendor for text, images, audio, hosted tools and remote MCP, with strict schemas and fine-grained keys, and four GPT-6 price points from Luna to Astra.",
        "slug": "openai-api",
        "watchFor": "Elevated errors across the API for about 5 hours 20 minutes on 29 September and about 90 minutes on 17 September 2026"
      },
      {
        "aheadOn": [
          "Reliability, 99 against 75",
          "Payments \u0026 pricing, 40 against 30"
        ],
        "also": [
          "Free to start without a card"
        ],
        "goodFor": "Google Cloud customers who need Gemini with residency, VPC-SC, provisioned throughput and an SLA, or Claude under a Google bill.",
        "slug": "vertex-ai",
        "watchFor": "The SLA drops from 99.5 to 95 per cent for short-term availability models, Gemini 3.7 and 3.6 Flash among them"
      }
    ],
    "history": {
      "openai-api": [
        {
          "causes": [
            "correction"
          ],
          "date": "2026-11-01",
          "delta": 1,
          "from": 82.9,
          "fromGrade": "A",
          "to": 83.9,
          "toGrade": "A"
        },
        {
          "causes": [
            "product"
          ],
          "date": "2026-10-17",
          "delta": -0.4,
          "from": 83.3,
          "fromGrade": "A",
          "to": 82.9,
          "toGrade": "A"
        },
        {
          "causes": [
            "method"
          ],
          "date": "2026-10-08",
          "delta": -0.2,
          "from": 83.5,
          "fromGrade": "A",
          "to": 83.3,
          "toGrade": "A"
        }
      ],
      "vertex-ai": null
    },
    "job": {
      "capability": "inference.llm",
      "name": "LLM inference"
    },
    "others": [
      {
        "json": "https://www.anchorterminal.com/compare/amazon-bedrock-vs-openai-api.json",
        "title": "Amazon Bedrock vs OpenAI API",
        "url": "https://www.anchorterminal.com/compare/amazon-bedrock-vs-openai-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/amazon-bedrock-vs-vertex-ai.json",
        "title": "Amazon Bedrock vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/amazon-bedrock-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/anthropic-api-vs-openai-api.json",
        "title": "Claude API vs OpenAI API",
        "url": "https://www.anchorterminal.com/compare/anthropic-api-vs-openai-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/anthropic-api-vs-vertex-ai.json",
        "title": "Claude API vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/anthropic-api-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/antseed-vs-openai-api.json",
        "title": "Antseed vs OpenAI API",
        "url": "https://www.anchorterminal.com/compare/antseed-vs-openai-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/antseed-vs-vertex-ai.json",
        "title": "Antseed vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/antseed-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/azure-openai-vs-openai-api.json",
        "title": "Azure OpenAI in Foundry Models vs OpenAI API",
        "url": "https://www.anchorterminal.com/compare/azure-openai-vs-openai-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/azure-openai-vs-vertex-ai.json",
        "title": "Azure OpenAI in Foundry Models vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/azure-openai-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/blockrun-ai-vs-openai-api.json",
        "title": "BlockRun.AI vs OpenAI API",
        "url": "https://www.anchorterminal.com/compare/blockrun-ai-vs-openai-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/blockrun-ai-vs-vertex-ai.json",
        "title": "BlockRun.AI vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/blockrun-ai-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cerebras-inference-vs-openai-api.json",
        "title": "Cerebras Inference vs OpenAI API",
        "url": "https://www.anchorterminal.com/compare/cerebras-inference-vs-openai-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cerebras-inference-vs-vertex-ai.json",
        "title": "Cerebras Inference vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/cerebras-inference-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cloudflare-ai-gateway-vs-openai-api.json",
        "title": "Cloudflare AI Gateway vs OpenAI API",
        "url": "https://www.anchorterminal.com/compare/cloudflare-ai-gateway-vs-openai-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cloudflare-ai-gateway-vs-vertex-ai.json",
        "title": "Cloudflare AI Gateway vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/cloudflare-ai-gateway-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-openai-api.json",
        "title": "Cloudflare Workers AI vs OpenAI API",
        "url": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-openai-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-vertex-ai.json",
        "title": "Cloudflare Workers AI vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cohere-chat-vs-openai-api.json",
        "title": "Cohere Chat API (Command models) vs OpenAI API",
        "url": "https://www.anchorterminal.com/compare/cohere-chat-vs-openai-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cohere-chat-vs-vertex-ai.json",
        "title": "Cohere Chat API (Command models) vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/cohere-chat-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/deepinfra-vs-openai-api.json",
        "title": "DeepInfra vs OpenAI API",
        "url": "https://www.anchorterminal.com/compare/deepinfra-vs-openai-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/deepinfra-vs-vertex-ai.json",
        "title": "DeepInfra vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/deepinfra-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/deepseek-api-vs-openai-api.json",
        "title": "DeepSeek API vs OpenAI API",
        "url": "https://www.anchorterminal.com/compare/deepseek-api-vs-openai-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/deepseek-api-vs-vertex-ai.json",
        "title": "DeepSeek API vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/deepseek-api-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/eden-ai-vs-openai-api.json",
        "title": "Eden AI vs OpenAI API",
        "url": "https://www.anchorterminal.com/compare/eden-ai-vs-openai-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/eden-ai-vs-vertex-ai.json",
        "title": "Eden AI vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/eden-ai-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/elorian-glimpse-vs-openai-api.json",
        "title": "Glimpse vs OpenAI API",
        "url": "https://www.anchorterminal.com/compare/elorian-glimpse-vs-openai-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/elorian-glimpse-vs-vertex-ai.json",
        "title": "Glimpse vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/elorian-glimpse-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/fireworks-inference-vs-openai-api.json",
        "title": "Fireworks AI Inference vs OpenAI API",
        "url": "https://www.anchorterminal.com/compare/fireworks-inference-vs-openai-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/fireworks-inference-vs-vertex-ai.json",
        "title": "Fireworks AI Inference vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/fireworks-inference-vs-vertex-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-vertex-ai.json",
        "title": "Gemini Developer API vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/gemini-api-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/groq-vs-openai-api.json",
        "title": "GroqCloud vs OpenAI API",
        "url": "https://www.anchorterminal.com/compare/groq-vs-openai-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/groq-vs-vertex-ai.json",
        "title": "GroqCloud vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/groq-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/hugging-face-inference-providers-vs-openai-api.json",
        "title": "Hugging Face Inference Providers vs OpenAI API",
        "url": "https://www.anchorterminal.com/compare/hugging-face-inference-providers-vs-openai-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/hugging-face-inference-providers-vs-vertex-ai.json",
        "title": "Hugging Face Inference Providers vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/hugging-face-inference-providers-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/inkling-2-small-vs-openai-api.json",
        "title": "Inkling 2 Small vs OpenAI API",
        "url": "https://www.anchorterminal.com/compare/inkling-2-small-vs-openai-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/inkling-2-small-vs-vertex-ai.json",
        "title": "Inkling 2 Small vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/inkling-2-small-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/jais-3-vs-openai-api.json",
        "title": "Jais 3 vs OpenAI API",
        "url": "https://www.anchorterminal.com/compare/jais-3-vs-openai-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/jais-3-vs-vertex-ai.json",
        "title": "Jais 3 vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/jais-3-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/meta-model-api-vs-openai-api.json",
        "title": "Meta Model API vs OpenAI API",
        "url": "https://www.anchorterminal.com/compare/meta-model-api-vs-openai-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/meta-model-api-vs-vertex-ai.json",
        "title": "Meta Model API vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/meta-model-api-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/minimax-api-vs-openai-api.json",
        "title": "MiniMax API vs OpenAI API",
        "url": "https://www.anchorterminal.com/compare/minimax-api-vs-openai-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/minimax-api-vs-vertex-ai.json",
        "title": "MiniMax API vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/minimax-api-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mistral-api-vs-openai-api.json",
        "title": "Mistral AI API vs OpenAI API",
        "url": "https://www.anchorterminal.com/compare/mistral-api-vs-openai-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mistral-api-vs-vertex-ai.json",
        "title": "Mistral AI API vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/mistral-api-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/muse-spark-open-vs-openai-api.json",
        "title": "Muse Spark Open vs OpenAI API",
        "url": "https://www.anchorterminal.com/compare/muse-spark-open-vs-openai-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/muse-spark-open-vs-vertex-ai.json",
        "title": "Muse Spark Open vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/muse-spark-open-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/nemotron-3-5-super-vl-vs-openai-api.json",
        "title": "Nemotron 3.5 Super VL vs OpenAI API",
        "url": "https://www.anchorterminal.com/compare/nemotron-3-5-super-vl-vs-openai-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/novita-ai-vs-openai-api.json",
        "title": "Novita AI vs OpenAI API",
        "url": "https://www.anchorterminal.com/compare/novita-ai-vs-openai-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/novita-ai-vs-vertex-ai.json",
        "title": "Novita AI vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/novita-ai-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/openai-api-vs-openrouter.json",
        "title": "OpenAI API vs OpenRouter",
        "url": "https://www.anchorterminal.com/compare/openai-api-vs-openrouter"
      },
      {
        "json": "https://www.anchorterminal.com/compare/openai-api-vs-prism-inference.json",
        "title": "OpenAI API vs Prism Inference",
        "url": "https://www.anchorterminal.com/compare/openai-api-vs-prism-inference"
      },
      {
        "json": "https://www.anchorterminal.com/compare/openai-api-vs-ramp-router.json",
        "title": "OpenAI API vs Router.com (Ramp Router)",
        "url": "https://www.anchorterminal.com/compare/openai-api-vs-ramp-router"
      },
      {
        "json": "https://www.anchorterminal.com/compare/openai-api-vs-reflection-beam.json",
        "title": "OpenAI API vs Beam 1.0",
        "url": "https://www.anchorterminal.com/compare/openai-api-vs-reflection-beam"
      },
      {
        "json": "https://www.anchorterminal.com/compare/openai-api-vs-routerplus.json",
        "title": "OpenAI API vs RouterPlus",
        "url": "https://www.anchorterminal.com/compare/openai-api-vs-routerplus"
      },
      {
        "json": "https://www.anchorterminal.com/compare/openai-api-vs-sambanova.json",
        "title": "OpenAI API vs SambaCloud",
        "url": "https://www.anchorterminal.com/compare/openai-api-vs-sambanova"
      },
      {
        "json": "https://www.anchorterminal.com/compare/openai-api-vs-siliconflow.json",
        "title": "OpenAI API vs SiliconFlow",
        "url": "https://www.anchorterminal.com/compare/openai-api-vs-siliconflow"
      },
      {
        "json": "https://www.anchorterminal.com/compare/openai-api-vs-simplismart.json",
        "title": "OpenAI API vs Simplismart",
        "url": "https://www.anchorterminal.com/compare/openai-api-vs-simplismart"
      },
      {
        "json": "https://www.anchorterminal.com/compare/openai-api-vs-stepfun-api.json",
        "title": "OpenAI API vs StepFun API",
        "url": "https://www.anchorterminal.com/compare/openai-api-vs-stepfun-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/openai-api-vs-swe-2-flash.json",
        "title": "OpenAI API vs SWE-2 Flash",
        "url": "https://www.anchorterminal.com/compare/openai-api-vs-swe-2-flash"
      },
      {
        "json": "https://www.anchorterminal.com/compare/openai-api-vs-tencent-tokenhub.json",
        "title": "OpenAI API vs Tencent Cloud TokenHub",
        "url": "https://www.anchorterminal.com/compare/openai-api-vs-tencent-tokenhub"
      },
      {
        "json": "https://www.anchorterminal.com/compare/openai-api-vs-together-inference.json",
        "title": "OpenAI API vs Together AI Inference",
        "url": "https://www.anchorterminal.com/compare/openai-api-vs-together-inference"
      },
      {
        "json": "https://www.anchorterminal.com/compare/openai-api-vs-vercel-ai-gateway.json",
        "title": "OpenAI API vs Vercel AI Gateway",
        "url": "https://www.anchorterminal.com/compare/openai-api-vs-vercel-ai-gateway"
      },
      {
        "json": "https://www.anchorterminal.com/compare/openai-api-vs-xai-api.json",
        "title": "OpenAI API vs xAI API (Grok)",
        "url": "https://www.anchorterminal.com/compare/openai-api-vs-xai-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/openrouter-vs-vertex-ai.json",
        "title": "OpenRouter vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/openrouter-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/prism-inference-vs-vertex-ai.json",
        "title": "Prism Inference vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/prism-inference-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/ramp-router-vs-vertex-ai.json",
        "title": "Router.com (Ramp Router) vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/ramp-router-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/reflection-beam-vs-vertex-ai.json",
        "title": "Beam 1.0 vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/reflection-beam-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/routerplus-vs-vertex-ai.json",
        "title": "RouterPlus vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/routerplus-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/sambanova-vs-vertex-ai.json",
        "title": "SambaCloud vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/sambanova-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/siliconflow-vs-vertex-ai.json",
        "title": "SiliconFlow vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/siliconflow-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/simplismart-vs-vertex-ai.json",
        "title": "Simplismart vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/simplismart-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/stepfun-api-vs-vertex-ai.json",
        "title": "StepFun API vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/stepfun-api-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/swe-2-flash-vs-vertex-ai.json",
        "title": "SWE-2 Flash vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/swe-2-flash-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/tencent-tokenhub-vs-vertex-ai.json",
        "title": "Tencent Cloud TokenHub vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/tencent-tokenhub-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/together-inference-vs-vertex-ai.json",
        "title": "Together AI Inference vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/together-inference-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/vercel-ai-gateway-vs-vertex-ai.json",
        "title": "Vercel AI Gateway vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/vercel-ai-gateway-vs-vertex-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/vertex-ai-vs-xai-api.json",
        "title": "Vertex AI (Gemini Enterprise Agent Platform) vs xAI API (Grok)",
        "url": "https://www.anchorterminal.com/compare/vertex-ai-vs-xai-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/nemotron-3-5-super-vl-vs-vertex-ai.json",
        "title": "Nemotron 3.5 Super VL vs Vertex AI (Gemini Enterprise Agent Platform)",
        "url": "https://www.anchorterminal.com/compare/nemotron-3-5-super-vl-vs-vertex-ai"
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    ],
    "panel": null,
    "scores": [
      {
        "by": 24,
        "edge": "vertex-ai",
        "key": "reliability",
        "name": "Reliability",
        "openai-api": 75,
        "vertex-ai": 99,
        "weight": 16
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
      },
      {
        "by": 6,
        "edge": "openai-api",
        "key": "schema",
        "name": "Schema \u0026 documentation",
        "openai-api": 100,
        "vertex-ai": 94,
        "weight": 13
      },
      {
        "by": 1,
        "edge": "openai-api",
        "key": "ergonomics",
        "name": "Agent ergonomics",
        "openai-api": 98,
        "vertex-ai": 97,
        "weight": 13
      },
      {
        "by": 3,
        "edge": "openai-api",
        "key": "security",
        "name": "Security \u0026 auth",
        "openai-api": 100,
        "vertex-ai": 97,
        "weight": 14
      },
      {
        "by": 10,
        "edge": "vertex-ai",
        "key": "payments",
        "name": "Payments \u0026 pricing",
        "openai-api": 30,
        "vertex-ai": 40,
        "weight": 10
      },
      {
        "key": "tasks",
        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "by": 4,
        "edge": "vertex-ai",
        "key": "maintenance",
        "name": "Maintenance \u0026 community",
        "openai-api": 87,
        "vertex-ai": 91,
        "weight": 7
      },
      {
        "by": 0,
        "edge": "",
        "key": "transparency",
        "name": "Transparency \u0026 trust",
        "openai-api": 90,
        "vertex-ai": 90,
        "weight": 7
      }
    ],
    "summary": "Vertex AI (Gemini Enterprise Agent Platform) scores 88.7 (AA) on agent readiness against OpenAI API's 83.9 (A), and leads in 3 of 7 scored categories. OpenAI API leads on schema \u0026 documentation. Both do llm inference.",
    "tasks": [
      {
        "a": "$15.42",
        "b": "$22.03",
        "cheaper": "openai-api",
        "task": "Research a product and write a sourced report",
        "what": "gpt-6-astra on OpenAI API, gemini-3.1-pro-preview on Vertex AI (Gemini Enterprise Agent Platform)"
      },
      {
        "a": "$5.54",
        "b": "$5.09",
        "cheaper": "vertex-ai",
        "task": "Build a small four-page website",
        "what": "gpt-6-astra on OpenAI API, gemini-3.1-pro-preview on Vertex AI (Gemini Enterprise Agent Platform)"
      },
      {
        "a": "$1.30",
        "b": "$1.09",
        "cheaper": "vertex-ai",
        "task": "Find and fix a bug in a large codebase",
        "what": "gpt-6-astra on OpenAI API, gemini-3.1-pro-preview on Vertex AI (Gemini Enterprise Agent Platform)"
      }
    ],
    "tutorials": [],
    "verdicts": {
      "openai-api": "Official OpenAPI document and an llms.txt index. Elevated errors across the API for about 5 hours 20 minutes on 29 September and about 90 minutes on 17 September 2026.",
      "vertex-ai": "Gemini, Claude and open models through one Google Cloud API with IAM, regional endpoints, schema-guaranteed JSON and a 99.5 per cent SLA, and no Vertex incident on the Cloud status page in the 90 days to 6 November 2026. Gemini 4 Argon and 3.8 Flash have 12-month availability, but short-term Flash models get a 95 per cent SLA."
    }
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  "markdown": "Vertex AI (Gemini Enterprise Agent Platform) scores 88.7 (AA) on agent readiness against OpenAI API's 83.9 (A), and leads in 3 of 7 scored categories. OpenAI API leads on schema \u0026 documentation. Both do llm inference.\n\n- OpenAI API: grade A, 83.9/100, rank #6 of 1486. Markdown https://www.anchorterminal.com/tools/openai-api.md · JSON https://www.anchorterminal.com/api/v1/tools/openai-api.json\n- Vertex AI (Gemini Enterprise Agent Platform): grade AA, 88.7/100, rank #2 of 1486. Markdown https://www.anchorterminal.com/tools/vertex-ai.md · JSON https://www.anchorterminal.com/api/v1/tools/vertex-ai.json\n- Best model APIs and inference for AI agents: https://www.anchorterminal.com/best/inference/index.md\n- All 830 models comparisons: https://www.anchorterminal.com/compare/inference/index.md\n\n## Which one, for what\n\n### OpenAI API (A)\n\nGood for: Agents that want one vendor for text, images, audio, hosted tools and remote MCP, with strict schemas and fine-grained keys, and four GPT-6 price points from Luna to Astra.\n\nAhead on:\n- Schema \u0026 documentation, 100 against 94\n\nWatch for: Elevated errors across the API for about 5 hours 20 minutes on 29 September and about 90 minutes on 17 September 2026\n\n### Vertex AI (Gemini Enterprise Agent Platform) (AA)\n\nGood for: Google Cloud customers who need Gemini with residency, VPC-SC, provisioned throughput and an SLA, or Claude under a Google bill.\n\nAhead on:\n- Reliability, 99 against 75\n- Payments \u0026 pricing, 40 against 30\n\nAlso in its favour:\n- Free to start without a card\n\nWatch for: The SLA drops from 99.5 to 95 per cent for short-term availability models, Gemini 3.7 and 3.6 Flash among them\n\n\n## Why the edge\n\n### Reliability: Vertex AI (Gemini Enterprise Agent Platform) +24\n\n- OpenAI API (75): Status page at status.openai.com with component history (20). Two API-wide majors in the 90 days to 1 November, elevated errors across ChatGPT, Codex and the API (the Agents API included) on 29 September, with Chat Completions, Responses, Batch, Realtime, Embeddings, Images, Files and the other API components degraded from 17:52 to 23:14 UTC, and elevated error rates across API models on 17 September, with eleven components degraded from 20:20 to 21:20 UTC. Two majors give 5 of 30. The 25 July incident is now outside the window. The 29 September write-up, posted on 6 October, traces it to a feature rollout that exhausted shared network connection capacity. Every other incident since 3 August that lists an API component is partial or under an hour, so minor. Degraded performance across ChatGPT, Codex and the APIs on 21 October listed every API component but ran 22 minutes (02:26 to 02:48 UTC). Single-model incidents were GPT-5.6 Sol errors on 11 September (09:08 to 11:21 UTC), `gpt-5.6-luna` errors on 21 October (70 minutes) and GPT-6.1 Sol degraded performance on Batch, Chat Completions and Responses on 27 October (78 minutes). Partial incidents were latency for some Responses requests on the US endpoint on 31 August and 1 September, image generation where some requests failed on 8 September, latency for some Responses and Chat Completions requests on 30 September, large-PDF errors in Responses and an Agents API computer use incident on 6 October, Responses errors for users in India, Japan and Korea on 22 October and errors on some GPT Image 2 edit requests on 30 October (14:35 to 18:36 UTC). Image model incidents on 16 September and 14 October and file download errors on 19 October each ran about 40 minutes. FedRAMP errors for Astra and Sol on 21 October and authentication errors near Illinois on 20 October list no API component. Rate limits published per tier and model family with rate-limit headers (15). 429 guidance, re-read on 1 November, covers `Retry-After` as a minimum wait, backoff with jitter when it's missing, a gradual ramp, and splits `slow_down` (429) from `server_is_overloaded` (503) (15). Scale Tier carries a 99.9% uptime SLA, through sales, per the 1 October check, not re-read on 1 November (10). Responses and Chat Completions are GA (10). 20 + 5 + 15 + 15 + 10 + 10 = 75.\n- Vertex AI (Gemini Enterprise Agent Platform) (99): Google Cloud status dashboard with per-product history (20). Its incident feed, read on 6 November, has no incident naming Vertex Gemini API, Gemini or the Agent Platform in the 90 days. The regional incidents of 20 August, 1 September and 20 October (europe-west2) and the Cloud Storage incident of 8 and 9 October didn't list it among affected products (30). Standard PayGo publishes usage tiers by 30-day spend with baseline throughput, 2,000,000 to 50,000,000 tokens a minute for Flash models and 500,000 to 10,000,000 for Pro, plus quota tables for other methods (15). A 429 page says to use the global endpoint and truncated exponential backoff, and a retry-strategy page (15). SLA of 99.5 per cent a month on generateContent and streamGenerateContent, 95 per cent for short-term availability models, and a latency SLO on Provisioned Throughput. The 429 page says pay-as-you-go 429s don't count toward the SLA error rate (10). Gemini 4 Argon reached GA on 13 October and Gemini 3.8 Flash moved to the 12-month tier, and the v1 API, 3.5 Flash-Lite and Claude Opus 5.5 are GA, but express mode was Preview at the 6 October check (9 of 10, up from 8). Up from 98 on 6 October.\n\n### Payments \u0026 pricing: Vertex AI (Gemini Enterprise Agent Platform) +10\n\n- OpenAI API (30): No machine payment protocol, and the pricing page names no machine or crypto payment on 1 November (0). Per-token prices published without a login (20). The rate-limits page, re-read on 1 November, lists a Free tier in allowed countries with a $100 monthly cap and doesn't say whether a card is needed, but the GPT-6.1 Sol, GPT-6.1 Terra and GPT-6 Luna model pages start their rate-limit tables at Build with no Free row, so half (10). Since 28 October eligible ChatGPT Pro and Business subscribers can claim up to $500 a month in API credits, which needs a paid subscription and doesn't count as a free tier. Signing up and making a key need a person in a browser (0).\n- Vertex AI (Gemini Enterprise Agent Platform) (40): No x402, MPP or L402 (0). Per-token prices per model and option published without a login (20). Express mode gives new Google Cloud users 90 days free within quotas with no billing details, though it's in Preview and needs a @gmail.com account (20). A person signs up in the console to get the express key (0).\n\n### Schema \u0026 documentation: OpenAI API +6\n\n- OpenAI API (100): Official OpenAPI document (openapi.yaml and openapi.json) in the openai/openai-openapi repository, whose openapi.yaml (version 2.3.0, updated 31 October) lists `gpt-6.1-terra` (25). llms.txt index with per-product files, and every docs page has a Markdown twin at `.md` (10). The reference documents each parameter, and model pages say which model fits which job (20). Structured outputs with `strict: true` on schemas and function tools (15). Error codes guide with types and recovery advice, now with a 400 `service_tier` error for tiers a project doesn't allow (15). Dated model snapshots and a dated changelog, last entry 30 October (15).\n- Vertex AI (Gemini Enterprise Agent Platform) (94): Model reading. Keyless discovery document for the Agent Platform API v1, revision 20260930, with 1,128 methods and 1,493 schemas (25). No llms.txt, but every docs page answers as Markdown at `.md.txt`, counted as for vertex-ai-tuning (10). Model cards give limits, capabilities and retirement dates, and the 3.8 Flash card says when to use 3.7 Flash instead, but the docs mix the Vertex AI and Agent Platform names, and the OpenAI page tells new users to call the Gemini Developer API instead (16 of 20). Structured output with `response_schema` and `response_mime_type: application/json` always follows the schema per the docs, and complex schemas fail with a 400 (15). Examples on every page and a 429 guide, but we found no full error code list for generateContent (13 of 15). Versioned v1 and v1beta1 APIs and release notes with entries on most working days, newest 5 November 2026 (15).\n\n## Score by category\n\n| Category | Weight | OpenAI API | Vertex AI (Gemini Enterprise Agent Platform) | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 75 | 99 | Vertex AI (Gemini Enterprise Agent Platform) +24 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 100 | 94 | OpenAI API +6 |\n| Agent ergonomics | 13% (16.2 this run) | 98 | 97 | OpenAI API +1 |\n| Security \u0026 auth | 14% (17.5 this run) | 100 | 97 | OpenAI API +3 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 30 | 40 | Vertex AI (Gemini Enterprise Agent Platform) +10 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 87 | 91 | Vertex AI (Gemini Enterprise Agent Platform) +4 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 90 | 90 | even |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **83.9 · A** | **88.7 · AA** | |\n\n## Facts side by side\n\n| Fact | OpenAI API | Vertex AI (Gemini Enterprise Agent Platform) |\n| --- | --- | --- |\n| Kind | Model API | Model API |\n| Vendor | OpenAI | Google Cloud |\n| Hosted endpoint | `https://api.openai.com/v1` | `https://aiplatform.googleapis.com/v1` |\n| Transports | HTTP | HTTP |\n| Auth | API key | OAuth or key |\n| Pricing | Pay per use | Pay per use |\n| x402 | no | no |\n| Licence | Apache-2.0 (SDKs) | Proprietary service under the Google Cloud Platform terms. Partner models carry their providers' terms. The Google Gen AI SDKs are Apache-2.0 |\n| Read-only variant documented | no | no |\n| llms.txt | yes | no |\n| Last release | 2026-10-30 | 2026-11-05 |\n| Terms last updated | couldn't be read | 2026-09-02 |\n| Privacy policy last updated | couldn't be read | 2026-10-01 |\n| Customer content may train models | couldn't be read | yes |\n| Terms restrict automated access | couldn't be read | not found in the text |\n| Terms restrict benchmarking | couldn't be read | not found in the text |\n| Terms or service can change without notice | couldn't be read | not found in the text |\n| Arbitration or class-action waiver | couldn't be read | not found in the text |\n| Popularity | 31k stars | 20.9M PyPI/wk |\n| Agent reviews | 3.5/5 (8) | none |\n\n## What the same task costs\n\n| Task | OpenAI API | Vertex AI (Gemini Enterprise Agent Platform) |\n| --- | --- | --- |\n| Research a product and write a sourced report | $15.42 | $22.03 |\n| Build a small four-page website | $5.54 | $5.09 |\n| Find and fix a bug in a large codebase | $1.30 | $1.09 |\n\n## How the scores have moved\n\n### OpenAI API\n\n- +1.0 on 1 November 2026: correction\n- -0.4 on 17 October 2026: product\n- -0.2 on 8 October 2026: checklist\n\n### Vertex AI (Gemini Enterprise Agent Platform)\n\nNo score change since it was listed.\n\n## Verdicts\n\n**OpenAI API.** Official OpenAPI document and an llms.txt index. Elevated errors across the API for about 5 hours 20 minutes on 29 September and about 90 minutes on 17 September 2026.\n\n**Vertex AI (Gemini Enterprise Agent Platform).** Gemini, Claude and open models through one Google Cloud API with IAM, regional endpoints, schema-guaranteed JSON and a 99.5 per cent SLA, and no Vertex incident on the Cloud status page in the 90 days to 6 November 2026. Gemini 4 Argon and 3.8 Flash have 12-month availability, but short-term Flash models get a 95 per cent SLA.\n\n## Before you call either\n\n### OpenAI API\n\n1. Build on the Responses API. Astra calls tools only there\n2. Use `gpt-6-luna` for routing and extraction, `gpt-6.1-terra` for screens, images and computer use at half Sol's price, and `gpt-6.1-sol` for most work. The models page still points unsure callers to `gpt-6-astra`\n3. Move off the GPT-4o and GPT-4.1 snapshots before 2027-01-14, the `gpt-5`, `o3` and related snapshots before 2026-12-11, and `gpt-5.1`, `gpt-5.3-codex` and `gpt-5.4-nano` before 2027-04-01. Check `shutdown_date` on `GET /v1/models`\n4. Treat 429 `slow_down` as a ramp limit and 503 `server_is_overloaded` as a retry, and follow `Retry-After` when it's sent\n5. Prompts over 272K tokens cost double on input. Trim before you pay for it\n\n### Vertex AI (Gemini Enterprise Agent Platform)\n\n1. Call the `global` location on aiplatform.googleapis.com unless data residency requires a Region. The 429 guide says it spreads load and reduces errors\n2. Back off exponentially on 429 `Resource exhausted`. On Standard PayGo it means shared capacity is busy, not a fixed quota\n3. Send `response_schema` with `response_mime_type: application/json`. JSON mode alone doesn't guarantee valid output\n4. Set `store` to false on Interactions API calls. It defaults to true and keeps prompts and responses\n5. Pin `gemini-4-argon` or `gemini-3.8-flash`, both in the 12-month tier, rather than 3.7 or 3.6 Flash, which retire on 28 January 2027 and 19 November 2026\n\n## Questions\n\n### Which is better for AI agents, OpenAI API or Vertex AI (Gemini Enterprise Agent Platform)?\n\nVertex AI (Gemini Enterprise Agent Platform) scores 88.7 (AA) on agent readiness against OpenAI API's 83.9 (A), and leads in 3 of 7 scored categories. OpenAI API leads on schema \u0026 documentation.\n\n### Do OpenAI API and Vertex AI (Gemini Enterprise Agent Platform) need an API key?\n\nOpenAI API needs an API key. Vertex AI (Gemini Enterprise Agent Platform) takes an API key or an OAuth sign-in.\n\n### Can an agent call OpenAI API and Vertex AI (Gemini Enterprise Agent Platform) without installing anything?\n\nYes. OpenAI API has a hosted endpoint at https://api.openai.com/v1 and Vertex AI (Gemini Enterprise Agent Platform) at https://aiplatform.googleapis.com/v1.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/openai-api-vs-vertex-ai.json, and with the fewest tokens: https://www.anchorterminal.com/compare/openai-api-vs-vertex-ai.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"openai-api\", \"b\": \"vertex-ai\"}`. From a terminal: `anchor compare openai-api vertex-ai`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/openai-api.json and https://www.anchorterminal.com/api/v1/tools/vertex-ai.json\n\n## Other comparisons with OpenAI API or Vertex AI (Gemini Enterprise Agent Platform)\n\n- [Amazon Bedrock vs OpenAI API](https://www.anchorterminal.com/compare/amazon-bedrock-vs-openai-api.md)\n- [Amazon Bedrock vs Vertex AI (Gemini Enterprise Agent Platform)](https://www.anchorterminal.com/compare/amazon-bedrock-vs-vertex-ai.md)\n- [Claude API vs OpenAI API](https://www.anchorterminal.com/compare/anthropic-api-vs-openai-api.md)\n- [Claude API vs Vertex AI (Gemini Enterprise Agent Platform)](https://www.anchorterminal.com/compare/anthropic-api-vs-vertex-ai.md)\n- [Antseed vs OpenAI API](https://www.anchorterminal.com/compare/antseed-vs-openai-api.md)\n- [Antseed vs Vertex AI (Gemini Enterprise Agent Platform)](https://www.anchorterminal.com/compare/antseed-vs-vertex-ai.md)\n- [Azure 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