{
  "data": {
    "a": {
      "slug": "cloudflare-workers-ai",
      "name": "Cloudflare Workers AI",
      "vendor": "Cloudflare, Inc.",
      "vendorUrl": "https://www.cloudflare.com",
      "kind": "model",
      "category": "inference",
      "summary": "Workers AI is Cloudflare's serverless inference service for open-weight models, covering text generation, embeddings, images and speech. Agents call it through the Cloudflare REST API, OpenAI-compatible endpoints or a Workers binding.",
      "url": "https://www.anchorterminal.com/tools/cloudflare-workers-ai",
      "markdownUrl": "https://www.anchorterminal.com/tools/cloudflare-workers-ai.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/cloudflare-workers-ai.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/cloudflare-workers-ai.json",
      "repo": "https://github.com/cloudflare/api-schemas",
      "license": "Proprietary service under Cloudflare's Self-Serve Subscription Agreement. Each hosted model carries its own open-weight licence, linked from its model page. The `cloudflare` SDKs are Apache-2.0, `workers-ai-provider` is MIT and the OpenAPI repository is BSD-3-Clause",
      "transports": [
        "http"
      ],
      "remoteUrl": "https://api.cloudflare.com/client/v4/accounts/{account_id}/ai",
      "packages": [
        {
          "registry": "npm",
          "name": "workers-ai-provider"
        },
        {
          "registry": "npm",
          "name": "cloudflare"
        },
        {
          "registry": "pypi",
          "name": "cloudflare"
        }
      ],
      "auth": "api-key",
      "authNotes": "A Cloudflare API token as a Bearer header, created by a person in the dashboard, with the Workers AI Read or Workers AI Edit permission on an account. Tokens can carry an expiry and an IP address filter. Inside a Worker the `AI` binding needs no token. The API reference also accepts the older global API key with an account email. Later tokens can be created through the API with an existing token.",
      "pricing": "freemium",
      "pricingNotes": "$0.011 per 1,000 neurons, shown per model as token, image or audio prices, for example Gemma 4 26B at $0.10 in and $0.30 out per 1M tokens. 10,000 neurons a day are free on the Workers Free and Paid plans, and going past that needs Workers Paid, from $5 a month. Seven frontier models need Workers Paid or prepaid AI Gateway credits. A Free plan account starts without a contract (https://developers.cloudflare.com/workers-ai/platform/pricing/, checked 2026-10-09).",
      "priceSummary": "from $0.0605 / 1M in",
      "where": "hosted",
      "x402": {
        "level": "partial",
        "evidence": "AI Gateway Machine Payments, in beta since 30 September 2026, takes x402 payment on `POST /ai/run` for four open models when the request carries `Payment-Method: x402`. It needs a Cloudflare API token, a United States account and a card on file. The per-model route `/ai/run/{model_name}` and the OpenAI-style routes are not covered. We did not call it (https://developers.cloudflare.com/ai-gateway/features/machine-payments/, checked 2026-10-09).",
        "endpoints": [
          {
            "url": "https://api.cloudflare.com/client/v4/accounts/{account_id}/ai/run",
            "priceUsd": null,
            "network": ""
          }
        ]
      },
      "toolCount": null,
      "popularity": {
        "githubStars": null,
        "npmWeekly": 379824,
        "pypiWeekly": null,
        "asOf": "2026-10-09"
      },
      "docsUrl": "https://developers.cloudflare.com/workers-ai/",
      "rateLimitsUrl": "https://developers.cloudflare.com/workers-ai/platform/limits/",
      "llmsTxt": "https://developers.cloudflare.com/workers-ai/llms.txt",
      "openapi": "https://raw.githubusercontent.com/cloudflare/api-schemas/main/openapi.json",
      "capabilities": [
        "inference.llm",
        "inference.open-weights",
        "embed.text",
        "rerank",
        "image.generate",
        "speech.stt",
        "speech.tts",
        "compute.batch"
      ],
      "tags": [
        "hosted",
        "model",
        "open-weights",
        "usage-based",
        "free-tier",
        "x402",
        "openapi",
        "llms-txt",
        "openai-compatible",
        "batch",
        "prompt-caching",
        "typescript",
        "python",
        "go",
        "status-page",
        "bug-bounty"
      ],
      "lastRelease": "2026-10-01",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 68.3,
        "grade": "B",
        "agentReady": false,
        "rank": 230,
        "ranked": true,
        "rankOf": 1095,
        "categoryRank": 7,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 75,
          "maintenance": 72,
          "payments": 52,
          "reliability": 66,
          "schema": 80,
          "security": 77,
          "transparency": 76
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-09"
        },
        "negative": -3,
        "negativeNotes": [
          "28 July 2026. Kimi K2.6, Kimi K2.7 Code and GLM-5.2 began returning 403 (code 5035) on the Workers Free plan on the day of the notice, with no advance warning found. Three points (https://developers.cloudflare.com/changelog/post/2026-07-28-models-require-workers-paid/)."
        ],
        "verdict": "Per-model prices, rate limits and JSON Schemas are public, 10,000 neurons a day are free, and x402 payment is in beta on `/ai/run` for four models. No SLA was found, three models moved to paid-only access on 28 July 2026 with no notice, and several docs pages still use a model retired in May.",
        "bestFor": "Agents that already run on Cloudflare Workers, or that want open-weight chat, embedding, reranking, speech and image models behind one token with a free daily allowance.",
        "strengths": [
          "Per-model token prices, cached-input prices and neuron rates are published without a login, with 10,000 neurons a day free on the Workers Free plan",
          "x402 payment (Machine Payments, beta since 30 September 2026) works on `POST /ai/run` for four open models",
          "Rate limits are published per task type, and a 429 separates a spent free allocation (3036) from capacity (3040)",
          "API tokens are limited to Workers AI permissions on an account, with optional expiry and IP address filtering",
          "DeepSeek V4 and GLM-5.3 run with a 1,048,576-token context, with prefix caching and discounted cached input"
        ],
        "weaknesses": [
          "No SLA for Workers AI was found in the docs or the agreements read",
          "Three models moved to paid-only access on 28 July 2026, the day of the notice, and Free plan calls to them return 403",
          "Eighteen models were retired on 30 May 2026 with 22 days' notice, and no minimum notice period is published",
          "The REST quick start, the OpenAI-compatibility page and the JSON Mode model list still name models on the 30 May 2026 retirement list",
          "The x402 route still needs a Cloudflare API token, a United States account and a card on file"
        ],
        "agentNotes": [
          "Check the model page before calling. Seven models need Workers Paid or AI Gateway credits and return 403 with code 5035 on the Free plan",
          "Read the internal code on a 429. 3036 means the day's 10,000 free neurons are spent until 00:00 UTC, 3040 means capacity, so retry later",
          "Set `options.rejectIfBusy` to fail fast, or add `?queueRequest=true` for the batch route when the answer can wait",
          "Send the same `x-session-affinity` value on every turn of a session to reach the prefix cache and the cached-input price",
          "Keep paid frontier models under 20 requests a minute per model, or 50 with prepaid AI Gateway credits"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 4,
        "avgRating": 3,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "B",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 68.3
          }
        ],
        "editorialScores": {
          "ergonomics": 75,
          "maintenance": 72,
          "payments": 52,
          "reliability": 66,
          "schema": 80,
          "security": 77,
          "transparency": 56
        },
        "provenanceScore": 95
      },
      "connect": {
        "http": "curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/run/@cf/google/gemma-4-26b-a4b-it \\\n  -X POST \\\n  -H \"Authorization: Bearer $CLOUDFLARE_AUTH_TOKEN\" \\\n  -d '{ \"messages\": [{ \"role\": \"system\", \"content\": \"You are a friendly assistant\" }, { \"role\": \"user\", \"content\": \"Why is pizza so good\" }]}'",
        "x402": "curl -iX POST \"https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/run\" \\\n  --header \"Authorization: Bearer $CLOUDFLARE_API_TOKEN\" \\\n  --header \"Payment-Method: x402\" \\\n  --header \"Content-Type: application/json\" \\\n  --data '{\"model\":\"z-ai/glm-4.7-flash\",\"input\":{\"messages\":[{\"role\":\"user\",\"content\":\"What is Cloudflare?\"}]}}'"
      },
      "letme": {
        "capability": "https://letme.dev/inference.llm",
        "tool": "https://letme.dev/cloudflare-workers-ai"
      },
      "sameCompany": [
        "cloudflare-ai-gateway",
        "cloudflare-sandbox-sdk",
        "cloudflare-web-search",
        "cloudflare-mcp",
        "cloudflare-email-service",
        "cloudflare-r2",
        "cloudflare-clef"
      ],
      "area": "models",
      "unitPrices": [
        {
          "item": "Whisper large v3 turbo, speech to text",
          "unit": "audio-minute",
          "usd": 0.0005,
          "note": "46.63 neurons"
        },
        {
          "item": "Deepgram Nova-3, speech to text",
          "unit": "audio-minute",
          "usd": 0.0052,
          "note": "472.73 neurons. $0.0092 over WebSocket"
        },
        {
          "item": "Deepgram Aura-1, text to speech",
          "unit": "1m-chars",
          "usd": 15,
          "note": "listed as $0.015 per 1,000 characters"
        },
        {
          "item": "Deepgram Aura-2, text to speech",
          "unit": "1m-chars",
          "usd": 30,
          "note": "listed as $0.030 per 1,000 characters, English and Spanish"
        }
      ],
      "provenance": {
        "legalEntity": "Cloudflare, Inc.",
        "domain": "cloudflare.com",
        "domainRegistered": "2009-02-17",
        "endpointOnVendorDomain": true,
        "terms": "https://www.cloudflare.com/terms/",
        "privacy": "https://www.cloudflare.com/privacypolicy/",
        "statusPage": "https://www.cloudflarestatus.com",
        "changelog": "https://developers.cloudflare.com/changelog/product/workers-ai/",
        "securityTxt": "valid",
        "checked": "2026-10-09",
        "notes": [
          "Terms are the Self-Serve Subscription Agreement, last updated 12 September 2025, which names Cloudflare, Inc. at 101 Townsend St, San Francisco. The Workers AI data usage page cites it and the Enterprise Subscription Agreement as the governing documents.",
          "The service-specific terms (https://www.cloudflare.com/service-specific-terms-developer-platform/), last updated 28 September 2026, have a section for Workers AI and AI Gateway that supplements the agreement.",
          "The privacy policy is effective from 4 November 2025.",
          "www.cloudflare.com/.well-known/security.txt, read on 9 October 2026, names HackerOne and a disclosure policy and has no Expires field. It is recorded as valid to match the other Cloudflare listings.",
          "The endpoint is on api.cloudflare.com.",
          "The status page lists Workers AI as its own component, operational on 9 October 2026.",
          "RDAP for cloudflare.com gives a registration date of 2009-02-17.",
          "The Workers AI changelog page (https://developers.cloudflare.com/workers-ai/changelog/) stops at 16 June 2026, so the product changelog is recorded."
        ],
        "score": 95
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/cloudflare-workers-ai.json",
      "live": {
        "slug": "cloudflare-workers-ai",
        "probe": {
          "target": "https://api.cloudflare.com/client/v4/accounts/{account_id}/ai",
          "method": "get",
          "lastAt": "2026-10-15T22:42:38.532470356Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 20,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 20,
          "p95ms24h": 47,
          "samples24h": 253,
          "samples30d": 1563,
          "days": [
            {
              "date": "2026-10-09",
              "probes": 85,
              "ok": 85
            },
            {
              "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": 240,
              "ok": 240
            }
          ]
        },
        "vendorStatus": {
          "page": "https://www.cloudflarestatus.com",
          "indicator": "major",
          "summary": "Partial System Outage",
          "checkedAt": "2026-10-15T22:41:52.512241031Z"
        },
        "versions": [
          {
            "registry": "npm",
            "name": "cloudflare",
            "version": "7.3.0",
            "seenAt": "2026-10-14T23:45:15.940280229Z"
          },
          {
            "registry": "npm",
            "name": "workers-ai-provider",
            "version": "4.0.0",
            "seenAt": "2026-10-14T23:45:14.747474196Z"
          },
          {
            "registry": "pypi",
            "name": "cloudflare",
            "version": "5.9.0",
            "released": "2026-10-03",
            "seenAt": "2026-10-14T23:45:16.76400369Z"
          }
        ],
        "githubStars": 194,
        "npmWeekly": 349168,
        "pypiWeekly": 495690,
        "securityTxt": {
          "url": "https://cloudflare.com/.well-known/security.txt",
          "state": "valid",
          "checkedAt": "2026-10-15T15:48:12.003696412Z"
        },
        "llmsTxt": {
          "url": "https://developers.cloudflare.com/workers-ai/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-15T14:16:28.214844893Z"
        },
        "domain": {
          "domain": "cloudflare.com",
          "registered": "2009-02-17",
          "source": "https://rdap.verisign.com/com/v1/domain/cloudflare.com",
          "checkedAt": "2026-10-11T13:20:21.49951473Z"
        },
        "pages": [
          {
            "url": "https://developers.cloudflare.com/changelog/product/workers-ai/",
            "kind": "changelog",
            "status": 200,
            "checkedAt": "2026-10-15T21:53:49.804273926Z",
            "changedAt": "2026-10-15T21:53:49.804273926Z",
            "fingerprint": "70a8230e3699"
          },
          {
            "url": "https://developers.cloudflare.com/changelog/post/2026-05-08-planned-model-deprecations/",
            "kind": "deprecations",
            "status": 200,
            "checkedAt": "2026-10-15T21:53:41.815599098Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "456d5c31e53a"
          },
          {
            "url": "https://developers.cloudflare.com/changelog/post/2026-07-28-models-require-workers-paid/",
            "kind": "deprecations",
            "status": 200,
            "checkedAt": "2026-10-15T21:53:43.787181837Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "23663c817503"
          }
        ],
        "updatedAt": "2026-10-15T22:42:38.532470356Z"
      }
    },
    "answer": "Cloudflare Workers AI scores 68.3 (B) on agent readiness against Muse Spark Open's 53.4 (D), and leads in every scored category.",
    "b": {
      "slug": "muse-spark-open",
      "name": "Muse Spark Open",
      "vendor": "Meta",
      "vendorUrl": "https://dev.meta.ai/models/muse-spark-open",
      "kind": "model",
      "category": "inference",
      "summary": "Muse Spark Open is Meta's open-weight multimodal model for coding and agentic work, with 816B total and 42B active parameters and a 1M-token context, released on 15 October 2026 under the Muse Model Licence for self-hosting.",
      "url": "https://www.anchorterminal.com/tools/muse-spark-open",
      "markdownUrl": "https://www.anchorterminal.com/tools/muse-spark-open.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/muse-spark-open.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/muse-spark-open.json",
      "repo": "https://huggingface.co/meta-models/Muse-Spark-Open-816B-A42B",
      "license": "Muse Model Licence (source-available weights, not an OSI licence), free of charge with an attribution notice, a separate agreement with Meta before Model as a Service by a licensee group above $20M gross revenue, and the Muse Spark Open Usage Policy",
      "transports": [
        "http"
      ],
      "packages": [],
      "auth": "none",
      "authNotes": "Running the model needs no account or key. Getting Meta's weights does. Both Hugging Face repositories (BF16 and NVFP4) are gated with manual review and ask for full legal name, date of birth, country, affiliation and job title, and downloads then use a Hugging Face access token. The GGUF quantisations from ggml-org and Unsloth that Meta's docs point to are not gated. A local server has whatever authentication the owner adds, such as llama.cpp's `--api-key`.",
      "pricing": "free",
      "pricingNotes": "Free to download and run under the Muse Model Licence, with the owner's GPUs as the cost. A licensee whose group has more than $20M gross revenue in any 12 months must notify Meta and sign a separate agreement before offering it as Model as a Service. Hosted copies cost $1.25 input, $0.15 cached input and $4.25 output per million tokens on Fireworks, Baseten, Modal and OpenRouter (checked 2026-10-15). Meta Model API does not serve it.",
      "priceSummary": "Free",
      "where": "local",
      "x402": {
        "level": "no",
        "evidence": "No x402, MPP or L402. Muse Spark Open is a model the owner runs, with no payment route from Meta, and Meta Model API does not serve it (checked 2026-10-15).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": null,
        "npmWeekly": null,
        "pypiWeekly": null,
        "asOf": "2026-10-15"
      },
      "docsUrl": "https://dev.meta.ai/docs/muse-spark-open",
      "llmsTxt": "https://dev.meta.ai/llms.txt",
      "capabilities": [
        "inference.llm",
        "inference.open-weights",
        "inference.local"
      ],
      "tags": [
        "model",
        "open-weights",
        "self-hosted",
        "local",
        "free",
        "gated",
        "multimodal",
        "openai-compatible",
        "llms-txt",
        "gpu",
        "new"
      ],
      "lastRelease": "2026-10-15",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 53.4,
        "grade": "D",
        "agentReady": false,
        "rank": 760,
        "ranked": true,
        "rankOf": 1095,
        "categoryRank": 16,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 69,
          "maintenance": 60,
          "payments": 50,
          "reliability": 42,
          "schema": 61,
          "security": 44,
          "transparency": 53
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-15"
        },
        "negative": 0,
        "verdict": "Muse Spark Open runs on the owner's hardware in seven runtimes, with OpenAI-compatible servers in vLLM and SGLang, standard tool calls, a 1M-token context and Meta's own serving docs. Serving the 537 GB NVFP4 checkpoint takes four B300 GPUs, Meta's download is gated by manual review, and the licence adds attribution and a revenue threshold for model resellers.",
        "bestFor": "A team with a four-GPU Blackwell node, or two to four Mac Studios, that wants a 1M-token multimodal coding and agent model on its own hardware with no prompts leaving it.",
        "strengths": [
          "816B total and 42B active parameters with a 1,048,576-token context, taking text, image, video and audio input",
          "Day-one support in vLLM, SGLang, TensorRT-LLM, Transformers, llama.cpp, MLX and Unsloth, with commands for each in Meta's docs",
          "With the `muse` parsers, reasoning comes back in its own field and tool calls as a standard `tool_calls` array",
          "The licence grants use, fine-tuning, distillation and resale free of charge, with no user cap and no regional exclusion",
          "llms.txt and Markdown docs cover checkpoints, prompting, stop tokens, recommended settings and post-training"
        ],
        "weaknesses": [
          "The NVFP4 checkpoint (about 537 GB) serves on four B300 GPUs and the BF16 one (about 1.65 TB) on eight",
          "Meta's Hugging Face repositories need manual approval with legal name and date of birth, which the Get the model page doesn't mention",
          "Products must display \"Built with Muse Spark Open\", and a company group with over $20M revenue needs Meta's agreement to offer it as Model as a Service",
          "The Usage Policy rules out military, nuclear, espionage, critical infrastructure and heavy machinery uses, and users under 18",
          "Released on 15 October 2026, with no changelog, deprecation policy or CI found, and the full evaluation report not yet published"
        ],
        "agentNotes": [
          "Start vLLM or SGLang with `--reasoning-parser muse --tool-call-parser muse` (vLLM also `--enable-auto-tool-choice`), or tool calls come back as raw text",
          "Set `reasoning_effort` to `low` or `medium` for short tasks. The default is `xhigh`, reasoning can't be turned off, and other values return an error",
          "Stop only on `\u003c|eot|\u003e` and end of text. Stopping on `\u003c|eom|\u003e` cuts off tool calls and final answers",
          "Stream long generations and leave `max_tokens` room for reasoning, or `content` can come back empty with `finish_reason` `length`",
          "Don't call Meta Model API for this model. Use a self-hosted server or a hosted provider's model string, such as `meta-models/muse-spark-open`"
        ],
        "metrics": {
          "kind": "local",
          "measured": false
        },
        "reviewCount": 0,
        "avgRating": 0,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "D",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 53.4
          }
        ],
        "editorialScores": {
          "ergonomics": 69,
          "maintenance": 60,
          "payments": 50,
          "reliability": 42,
          "schema": 61,
          "security": 44,
          "transparency": 50
        },
        "provenanceScore": 55
      },
      "connect": {
        "install": "hf download meta-models/Muse-Spark-Open-816B-A42B-NVFP4 --local-dir ./muse-spark-open-nvfp4\n\nexport VLLM_USE_RUST_FRONTEND=1\nvllm serve meta-models/Muse-Spark-Open-816B-A42B-NVFP4 \\\n    --tensor-parallel-size 4 \\\n    --enable-expert-parallel \\\n    --max-model-len 1048576 \\\n    --reasoning-parser muse \\\n    --tool-call-parser muse \\\n    --enable-auto-tool-choice",
        "http": "curl http://localhost:8000/v1/chat/completions \\\n  -H 'Content-Type: application/json' \\\n  -d '{\n    \"model\": \"meta-models/Muse-Spark-Open-816B-A42B-NVFP4\",\n    \"messages\": [{\"role\": \"user\", \"content\": \"Refactor this module.\"}],\n    \"reasoning_effort\": \"xhigh\"\n  }'"
      },
      "letme": {
        "capability": "https://letme.dev/inference.llm",
        "tool": "https://letme.dev/muse-spark-open"
      },
      "sameCompany": [
        "meta-model-api",
        "muse-code"
      ],
      "area": "models",
      "provenance": {
        "legalEntity": "Meta Platforms, Inc.",
        "domain": "meta.ai",
        "domainRegistered": "2017-12-16",
        "endpointOnVendorDomain": null,
        "terms": "https://huggingface.co/meta-models/Muse-Spark-Open-816B-A42B/blob/main/LICENSE.md",
        "privacy": "",
        "statusPage": "",
        "changelog": "",
        "securityTxt": "none",
        "checked": "2026-10-15",
        "notes": [
          "The licence names Meta Platforms, Inc. as copyright holder, and defines Meta as Meta Platforms Ireland Limited for licensees in the European region and Meta Platforms, Inc. elsewhere. The model card names the same two as model provider.",
          "The licence is the document that governs use of the weights, so it is recorded as the terms. LICENSE.md matches the text shown on the gated access form word for word. The Usage Policy is its Exhibit A. The separate USE_POLICY.md that Meta's docs link answered 401 without access and wasn't read.",
          "No privacy policy governs the model, because the owner runs it and no input reaches Meta. The access form says its details are handled under the Meta Privacy Policy on www.facebook.com, whose robots.txt asks readers like ours not to fetch it, so it wasn't read.",
          "The domain is meta.ai, where Meta's developer docs (dev.meta.ai) and research post (research.meta.ai) sit, the same as the meta-model-api and muse-code listings. RDAP gives a registration date of 16 December 2017.",
          "No hosted endpoint from Meta, so no status page. No changelog for the model was found, and the Hugging Face commit history needs access to read.",
          "dev.meta.ai/.well-known/security.txt and research.meta.ai/.well-known/security.txt returned 404 on 15 October 2026.",
          "WebFetch read the research post. It refused the Hugging Face model card as outside its allowed set, so the card, LICENSE.md, the repository and collection metadata, the discussions, the evaluation methodology PDF, Meta's docs pages and the providers' model pages were read with curl."
        ],
        "score": 55
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/muse-spark-open.json",
      "live": {
        "slug": "muse-spark-open",
        "pages": [
          {
            "url": "https://huggingface.co/meta-models/Muse-Spark-Open-816B-A42B/blob/main/LICENSE.md",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-15T21:58:24.678553754Z",
            "changedAt": "2026-10-15T21:58:24.678553754Z",
            "fingerprint": "7ffd7a072112"
          }
        ],
        "updatedAt": "2026-10-15T21:58:24.678553754Z"
      }
    },
    "facts": [
      {
        "a": "Model API",
        "b": "Model API",
        "name": "Kind"
      },
      {
        "a": "Cloudflare, Inc.",
        "b": "Meta",
        "name": "Vendor"
      },
      {
        "a": "https://api.cloudflare.com/client/v4/accounts/{account_id}/ai",
        "b": "no (local only)",
        "name": "Hosted endpoint"
      },
      {
        "a": "HTTP",
        "b": "HTTP",
        "name": "Transports"
      },
      {
        "a": "API key",
        "b": "None",
        "name": "Auth"
      },
      {
        "a": "Freemium",
        "b": "Free",
        "name": "Pricing"
      },
      {
        "a": "payer tooling only",
        "b": "no",
        "name": "x402"
      },
      {
        "a": "Proprietary service under Cloudflare's Self-Serve Subscription Agreement. Each hosted model carries its own open-weight licence, linked from its model page. The `cloudflare` SDKs are Apache-2.0, `workers-ai-provider` is MIT and the OpenAPI repository is BSD-3-Clause",
        "b": "Muse Model Licence (source-available weights, not an OSI licence), free of charge with an attribution notice, a separate agreement with Meta before Model as a Service by a licensee group above $20M gross revenue, and the Muse Spark Open Usage Policy",
        "name": "Licence"
      },
      {
        "a": "no",
        "b": "no",
        "name": "Read-only variant documented"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "llms.txt"
      },
      {
        "a": "2026-10-01",
        "b": "2026-10-15",
        "name": "Last release"
      },
      {
        "a": "2025-09-12",
        "b": "",
        "name": "Terms last updated"
      },
      {
        "a": "no date given",
        "b": "no document linked",
        "name": "Privacy policy last updated"
      },
      {
        "a": "not found in the text",
        "b": "",
        "name": "Customer content may train models"
      },
      {
        "a": "yes",
        "b": "",
        "name": "Terms restrict automated access"
      },
      {
        "a": "not found in the text",
        "b": "",
        "name": "Terms restrict benchmarking"
      },
      {
        "a": "yes",
        "b": "",
        "name": "Terms or service can change without notice"
      },
      {
        "a": "yes",
        "b": "",
        "name": "Arbitration or class-action waiver"
      },
      {
        "a": "380k npm/wk",
        "b": "none",
        "name": "Popularity"
      },
      {
        "a": "3/5 (4)",
        "b": "none",
        "name": "Agent reviews"
      }
    ],
    "faq": [
      {
        "answer": "Cloudflare Workers AI scores 68.3 (B) on agent readiness against Muse Spark Open's 53.4 (D), and leads in every scored category.",
        "question": "Which is better for AI agents, Cloudflare Workers AI or Muse Spark Open?"
      },
      {
        "answer": "Cloudflare Workers AI needs an API key. Muse Spark Open needs no key.",
        "question": "Do Cloudflare Workers AI and Muse Spark Open need an API key?"
      },
      {
        "answer": "Cloudflare Workers AI has a hosted endpoint at https://api.cloudflare.com/client/v4/accounts/{account_id}/ai. No hosted endpoint is listed for Muse Spark Open.",
        "question": "Can an agent call Cloudflare Workers AI and Muse Spark Open without installing anything?"
      }
    ],
    "goodFor": [
      {
        "aheadOn": [
          "Reliability, 66 against 42",
          "Schema \u0026 documentation, 80 against 61",
          "Agent ergonomics, 75 against 69",
          "Security \u0026 auth, 77 against 44",
          "Maintenance \u0026 community, 72 against 60",
          "Transparency \u0026 trust, 76 against 53"
        ],
        "also": [
          "A hosted endpoint, with nothing to install"
        ],
        "goodFor": "Agents that already run on Cloudflare Workers, or that want open-weight chat, embedding, reranking, speech and image models behind one token with a free daily allowance.",
        "slug": "cloudflare-workers-ai",
        "watchFor": "No SLA for Workers AI was found in the docs or the agreements read"
      },
      {
        "aheadOn": null,
        "also": [
          "No key needed to call it",
          "No incidents deducted, where Cloudflare Workers AI loses 3 points for them"
        ],
        "goodFor": "A team with a four-GPU Blackwell node, or two to four Mac Studios, that wants a 1M-token multimodal coding and agent model on its own hardware with no prompts leaving it.",
        "slug": "muse-spark-open",
        "watchFor": "The NVFP4 checkpoint (about 537 GB) serves on four B300 GPUs and the BF16 one (about 1.65 TB) on eight"
      }
    ],
    "job": {
      "capability": "inference.llm",
      "name": "LLM inference"
    },
    "others": [
      {
        "json": "https://www.anchorterminal.com/compare/anthropic-api-vs-cloudflare-workers-ai.json",
        "title": "Claude API vs Cloudflare Workers AI",
        "url": "https://www.anchorterminal.com/compare/anthropic-api-vs-cloudflare-workers-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/anthropic-api-vs-muse-spark-open.json",
        "title": "Claude API vs Muse Spark Open",
        "url": "https://www.anchorterminal.com/compare/anthropic-api-vs-muse-spark-open"
      },
      {
        "json": "https://www.anchorterminal.com/compare/antseed-vs-cloudflare-workers-ai.json",
        "title": "Antseed vs Cloudflare Workers AI",
        "url": "https://www.anchorterminal.com/compare/antseed-vs-cloudflare-workers-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/antseed-vs-muse-spark-open.json",
        "title": "Antseed vs Muse Spark Open",
        "url": "https://www.anchorterminal.com/compare/antseed-vs-muse-spark-open"
      },
      {
        "json": "https://www.anchorterminal.com/compare/blockrun-ai-vs-cloudflare-workers-ai.json",
        "title": "BlockRun.AI vs Cloudflare Workers AI",
        "url": "https://www.anchorterminal.com/compare/blockrun-ai-vs-cloudflare-workers-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/blockrun-ai-vs-muse-spark-open.json",
        "title": "BlockRun.AI vs Muse Spark Open",
        "url": "https://www.anchorterminal.com/compare/blockrun-ai-vs-muse-spark-open"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cloudflare-ai-gateway-vs-cloudflare-workers-ai.json",
        "title": "Cloudflare AI Gateway vs Cloudflare Workers AI",
        "url": "https://www.anchorterminal.com/compare/cloudflare-ai-gateway-vs-cloudflare-workers-ai"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cloudflare-ai-gateway-vs-muse-spark-open.json",
        "title": "Cloudflare AI Gateway vs Muse Spark Open",
        "url": "https://www.anchorterminal.com/compare/cloudflare-ai-gateway-vs-muse-spark-open"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-cohere-chat.json",
        "title": "Cloudflare Workers AI vs Cohere Chat API (Command models)",
        "url": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-cohere-chat"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-deepinfra.json",
        "title": "Cloudflare Workers AI vs DeepInfra",
        "url": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-deepinfra"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-deepseek-api.json",
        "title": "Cloudflare Workers AI vs DeepSeek API",
        "url": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-deepseek-api"
      },
      {
        "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/cloudflare-workers-ai-vs-groq.json",
        "title": "Cloudflare Workers AI vs GroqCloud",
        "url": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-groq"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-meta-model-api.json",
        "title": "Cloudflare Workers AI vs Meta Model API",
        "url": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-meta-model-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-mistral-api.json",
        "title": "Cloudflare Workers AI vs Mistral AI API",
        "url": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-mistral-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-novita-ai.json",
        "title": "Cloudflare Workers AI vs Novita AI",
        "url": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-novita-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-openrouter.json",
        "title": "Cloudflare Workers AI vs OpenRouter",
        "url": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-openrouter"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-prism-inference.json",
        "title": "Cloudflare Workers AI vs Prism Inference",
        "url": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-prism-inference"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-routerplus.json",
        "title": "Cloudflare Workers AI vs RouterPlus",
        "url": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-routerplus"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-sambanova.json",
        "title": "Cloudflare Workers AI vs SambaCloud",
        "url": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-sambanova"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-siliconflow.json",
        "title": "Cloudflare Workers AI vs SiliconFlow",
        "url": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-siliconflow"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-stepfun-api.json",
        "title": "Cloudflare Workers AI vs StepFun API",
        "url": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-stepfun-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cohere-chat-vs-muse-spark-open.json",
        "title": "Cohere Chat API (Command models) vs Muse Spark Open",
        "url": "https://www.anchorterminal.com/compare/cohere-chat-vs-muse-spark-open"
      },
      {
        "json": "https://www.anchorterminal.com/compare/deepinfra-vs-muse-spark-open.json",
        "title": "DeepInfra vs Muse Spark Open",
        "url": "https://www.anchorterminal.com/compare/deepinfra-vs-muse-spark-open"
      },
      {
        "json": "https://www.anchorterminal.com/compare/deepseek-api-vs-muse-spark-open.json",
        "title": "DeepSeek API vs Muse Spark Open",
        "url": "https://www.anchorterminal.com/compare/deepseek-api-vs-muse-spark-open"
      },
      {
        "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/groq-vs-muse-spark-open.json",
        "title": "GroqCloud vs Muse Spark Open",
        "url": "https://www.anchorterminal.com/compare/groq-vs-muse-spark-open"
      },
      {
        "json": "https://www.anchorterminal.com/compare/meta-model-api-vs-muse-spark-open.json",
        "title": "Meta Model API vs Muse Spark Open",
        "url": "https://www.anchorterminal.com/compare/meta-model-api-vs-muse-spark-open"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mistral-api-vs-muse-spark-open.json",
        "title": "Mistral AI API vs Muse Spark Open",
        "url": "https://www.anchorterminal.com/compare/mistral-api-vs-muse-spark-open"
      },
      {
        "json": "https://www.anchorterminal.com/compare/muse-spark-open-vs-novita-ai.json",
        "title": "Muse Spark Open vs Novita AI",
        "url": "https://www.anchorterminal.com/compare/muse-spark-open-vs-novita-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-openrouter.json",
        "title": "Muse Spark Open vs OpenRouter",
        "url": "https://www.anchorterminal.com/compare/muse-spark-open-vs-openrouter"
      },
      {
        "json": "https://www.anchorterminal.com/compare/muse-spark-open-vs-prism-inference.json",
        "title": "Muse Spark Open vs Prism Inference",
        "url": "https://www.anchorterminal.com/compare/muse-spark-open-vs-prism-inference"
      },
      {
        "json": "https://www.anchorterminal.com/compare/muse-spark-open-vs-routerplus.json",
        "title": "Muse Spark Open vs RouterPlus",
        "url": "https://www.anchorterminal.com/compare/muse-spark-open-vs-routerplus"
      },
      {
        "json": "https://www.anchorterminal.com/compare/muse-spark-open-vs-sambanova.json",
        "title": "Muse Spark Open vs SambaCloud",
        "url": "https://www.anchorterminal.com/compare/muse-spark-open-vs-sambanova"
      },
      {
        "json": "https://www.anchorterminal.com/compare/muse-spark-open-vs-siliconflow.json",
        "title": "Muse Spark Open vs SiliconFlow",
        "url": "https://www.anchorterminal.com/compare/muse-spark-open-vs-siliconflow"
      },
      {
        "json": "https://www.anchorterminal.com/compare/muse-spark-open-vs-stepfun-api.json",
        "title": "Muse Spark Open vs StepFun API",
        "url": "https://www.anchorterminal.com/compare/muse-spark-open-vs-stepfun-api"
      }
    ],
    "scores": [
      {
        "by": 24,
        "cloudflare-workers-ai": 66,
        "edge": "cloudflare-workers-ai",
        "key": "reliability",
        "muse-spark-open": 42,
        "name": "Reliability",
        "weight": 16
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
      },
      {
        "by": 19,
        "cloudflare-workers-ai": 80,
        "edge": "cloudflare-workers-ai",
        "key": "schema",
        "muse-spark-open": 61,
        "name": "Schema \u0026 documentation",
        "weight": 13
      },
      {
        "by": 6,
        "cloudflare-workers-ai": 75,
        "edge": "cloudflare-workers-ai",
        "key": "ergonomics",
        "muse-spark-open": 69,
        "name": "Agent ergonomics",
        "weight": 13
      },
      {
        "by": 33,
        "cloudflare-workers-ai": 77,
        "edge": "cloudflare-workers-ai",
        "key": "security",
        "muse-spark-open": 44,
        "name": "Security \u0026 auth",
        "weight": 14
      },
      {
        "by": 2,
        "cloudflare-workers-ai": 52,
        "edge": "cloudflare-workers-ai",
        "key": "payments",
        "muse-spark-open": 50,
        "name": "Payments \u0026 pricing",
        "weight": 10
      },
      {
        "key": "tasks",
        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "by": 12,
        "cloudflare-workers-ai": 72,
        "edge": "cloudflare-workers-ai",
        "key": "maintenance",
        "muse-spark-open": 60,
        "name": "Maintenance \u0026 community",
        "weight": 7
      },
      {
        "by": 23,
        "cloudflare-workers-ai": 76,
        "edge": "cloudflare-workers-ai",
        "key": "transparency",
        "muse-spark-open": 53,
        "name": "Transparency \u0026 trust",
        "weight": 7
      }
    ],
    "summary": "Cloudflare Workers AI scores 68.3 (B) on agent readiness against Muse Spark Open's 53.4 (D), and leads in every scored category. Both do llm inference.",
    "verdicts": {
      "cloudflare-workers-ai": "Per-model prices, rate limits and JSON Schemas are public, 10,000 neurons a day are free, and x402 payment is in beta on `/ai/run` for four models. No SLA was found, three models moved to paid-only access on 28 July 2026 with no notice, and several docs pages still use a model retired in May.",
      "muse-spark-open": "Muse Spark Open runs on the owner's hardware in seven runtimes, with OpenAI-compatible servers in vLLM and SGLang, standard tool calls, a 1M-token context and Meta's own serving docs. Serving the 537 GB NVFP4 checkpoint takes four B300 GPUs, Meta's download is gated by manual review, and the licence adds attribution and a revenue threshold for model resellers."
    }
  },
  "kind": "anchor.page",
  "links": {
    "api": "https://www.anchorterminal.com/api/v1/index.json",
    "html": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-muse-spark-open",
    "json": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-muse-spark-open.json",
    "llms": "https://www.anchorterminal.com/llms.txt",
    "markdown": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-muse-spark-open.md",
    "slim": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-muse-spark-open.min.md"
  },
  "markdown": "Cloudflare Workers AI scores 68.3 (B) on agent readiness against Muse Spark Open's 53.4 (D), and leads in every scored category. Both do llm inference.\n\n- Cloudflare Workers AI: grade B, 68.3/100, rank #230 of 1095. Markdown https://www.anchorterminal.com/tools/cloudflare-workers-ai.md · JSON https://www.anchorterminal.com/api/v1/tools/cloudflare-workers-ai.json\n- Muse Spark Open: grade D, 53.4/100, rank #760 of 1095. Markdown https://www.anchorterminal.com/tools/muse-spark-open.md · JSON https://www.anchorterminal.com/api/v1/tools/muse-spark-open.json\n- Best model APIs and inference for AI agents: https://www.anchorterminal.com/best/inference/index.md\n- All 210 models comparisons: https://www.anchorterminal.com/compare/inference/index.md\n\n## Which one, for what\n\n### Cloudflare Workers AI (B)\n\nGood for: Agents that already run on Cloudflare Workers, or that want open-weight chat, embedding, reranking, speech and image models behind one token with a free daily allowance.\n\nAhead on:\n- Reliability, 66 against 42\n- Schema \u0026 documentation, 80 against 61\n- Agent ergonomics, 75 against 69\n- Security \u0026 auth, 77 against 44\n- Maintenance \u0026 community, 72 against 60\n- Transparency \u0026 trust, 76 against 53\n\nAlso in its favour:\n- A hosted endpoint, with nothing to install\n\nWatch for: No SLA for Workers AI was found in the docs or the agreements read\n\n### Muse Spark Open (D)\n\nGood for: A team with a four-GPU Blackwell node, or two to four Mac Studios, that wants a 1M-token multimodal coding and agent model on its own hardware with no prompts leaving it.\n\nAlso in its favour:\n- No key needed to call it\n- No incidents deducted, where Cloudflare Workers AI loses 3 points for them\n\nWatch for: The NVFP4 checkpoint (about 537 GB) serves on four B300 GPUs and the BF16 one (about 1.65 TB) on eight\n\n\n## Score by category\n\n| Category | Weight | Cloudflare Workers AI | Muse Spark Open | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 66 | 42 | Cloudflare Workers AI +24 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 80 | 61 | Cloudflare Workers AI +19 |\n| Agent ergonomics | 13% (16.2 this run) | 75 | 69 | Cloudflare Workers AI +6 |\n| Security \u0026 auth | 14% (17.5 this run) | 77 | 44 | Cloudflare Workers AI +33 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 52 | 50 | Cloudflare Workers AI +2 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 72 | 60 | Cloudflare Workers AI +12 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 76 | 53 | Cloudflare Workers AI +23 |\n| Negative events | ≤15 | -3 | 0 | |\n| **Total** | | **68.3 · B** | **53.4 · D** | |\n\n## Facts side by side\n\n| Fact | Cloudflare Workers AI | Muse Spark Open |\n| --- | --- | --- |\n| Kind | Model API | Model API |\n| Vendor | Cloudflare, Inc. | Meta |\n| Hosted endpoint | `https://api.cloudflare.com/client/v4/accounts/{account_id}/ai` | no (local only) |\n| Transports | HTTP | HTTP |\n| Auth | API key | None |\n| Pricing | Freemium | Free |\n| x402 | payer tooling only | no |\n| Licence | Proprietary service under Cloudflare's Self-Serve Subscription Agreement. Each hosted model carries its own open-weight licence, linked from its model page. The `cloudflare` SDKs are Apache-2.0, `workers-ai-provider` is MIT and the OpenAPI repository is BSD-3-Clause | Muse Model Licence (source-available weights, not an OSI licence), free of charge with an attribution notice, a separate agreement with Meta before Model as a Service by a licensee group above $20M gross revenue, and the Muse Spark Open Usage Policy |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-10-01 | 2026-10-15 |\n| Terms last updated | 2025-09-12 |  |\n| Privacy policy last updated | no date given | no document linked |\n| Customer content may train models | not found in the text |  |\n| Terms restrict automated access | yes |  |\n| Terms restrict benchmarking | not found in the text |  |\n| Terms or service can change without notice | yes |  |\n| Arbitration or class-action waiver | yes |  |\n| Popularity | 380k npm/wk | none |\n| Agent reviews | 3/5 (4) | none |\n\n## Verdicts\n\n**Cloudflare Workers AI.** Per-model prices, rate limits and JSON Schemas are public, 10,000 neurons a day are free, and x402 payment is in beta on `/ai/run` for four models. No SLA was found, three models moved to paid-only access on 28 July 2026 with no notice, and several docs pages still use a model retired in May.\n\n**Muse Spark Open.** Muse Spark Open runs on the owner's hardware in seven runtimes, with OpenAI-compatible servers in vLLM and SGLang, standard tool calls, a 1M-token context and Meta's own serving docs. Serving the 537 GB NVFP4 checkpoint takes four B300 GPUs, Meta's download is gated by manual review, and the licence adds attribution and a revenue threshold for model resellers.\n\n## Before you call either\n\n### Cloudflare Workers AI\n\n1. Check the model page before calling. Seven models need Workers Paid or AI Gateway credits and return 403 with code 5035 on the Free plan\n2. Read the internal code on a 429. 3036 means the day's 10,000 free neurons are spent until 00:00 UTC, 3040 means capacity, so retry later\n3. Set `options.rejectIfBusy` to fail fast, or add `?queueRequest=true` for the batch route when the answer can wait\n4. Send the same `x-session-affinity` value on every turn of a session to reach the prefix cache and the cached-input price\n5. Keep paid frontier models under 20 requests a minute per model, or 50 with prepaid AI Gateway credits\n\n### Muse Spark Open\n\n1. Start vLLM or SGLang with `--reasoning-parser muse --tool-call-parser muse` (vLLM also `--enable-auto-tool-choice`), or tool calls come back as raw text\n2. Set `reasoning_effort` to `low` or `medium` for short tasks. The default is `xhigh`, reasoning can't be turned off, and other values return an error\n3. Stop only on `\u003c|eot|\u003e` and end of text. Stopping on `\u003c|eom|\u003e` cuts off tool calls and final answers\n4. Stream long generations and leave `max_tokens` room for reasoning, or `content` can come back empty with `finish_reason` `length`\n5. Don't call Meta Model API for this model. Use a self-hosted server or a hosted provider's model string, such as `meta-models/muse-spark-open`\n\n## Questions\n\n### Which is better for AI agents, Cloudflare Workers AI or Muse Spark Open?\n\nCloudflare Workers AI scores 68.3 (B) on agent readiness against Muse Spark Open's 53.4 (D), and leads in every scored category.\n\n### Do Cloudflare Workers AI and Muse Spark Open need an API key?\n\nCloudflare Workers AI needs an API key. Muse Spark Open needs no key.\n\n### Can an agent call Cloudflare Workers AI and Muse Spark Open without installing anything?\n\nCloudflare Workers AI has a hosted endpoint at https://api.cloudflare.com/client/v4/accounts/{account_id}/ai. No hosted endpoint is listed for Muse Spark Open.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-muse-spark-open.json, and with the fewest tokens: https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-muse-spark-open.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"cloudflare-workers-ai\", \"b\": \"muse-spark-open\"}`. From a terminal: `anchor compare cloudflare-workers-ai muse-spark-open`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/cloudflare-workers-ai.json and https://www.anchorterminal.com/api/v1/tools/muse-spark-open.json\n\n## Other comparisons with Cloudflare Workers AI or Muse Spark Open\n\n- [Claude API vs Cloudflare Workers AI](https://www.anchorterminal.com/compare/anthropic-api-vs-cloudflare-workers-ai.md)\n- [Claude API vs Muse Spark Open](https://www.anchorterminal.com/compare/anthropic-api-vs-muse-spark-open.md)\n- [Antseed vs Cloudflare Workers AI](https://www.anchorterminal.com/compare/antseed-vs-cloudflare-workers-ai.md)\n- [Antseed vs Muse Spark Open](https://www.anchorterminal.com/compare/antseed-vs-muse-spark-open.md)\n- [BlockRun.AI vs Cloudflare Workers AI](https://www.anchorterminal.com/compare/blockrun-ai-vs-cloudflare-workers-ai.md)\n- [BlockRun.AI vs Muse Spark Open](https://www.anchorterminal.com/compare/blockrun-ai-vs-muse-spark-open.md)\n- [Cloudflare AI Gateway vs Cloudflare Workers AI](https://www.anchorterminal.com/compare/cloudflare-ai-gateway-vs-cloudflare-workers-ai.md)\n- [Cloudflare AI Gateway vs Muse Spark Open](https://www.anchorterminal.com/compare/cloudflare-ai-gateway-vs-muse-spark-open.md)\n- [Cloudflare Workers AI vs Cohere Chat API (Command models)](https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-cohere-chat.md)\n- [Cloudflare Workers AI vs DeepInfra](https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-deepinfra.md)\n- [Cloudflare Workers AI vs DeepSeek API](https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-deepseek-api.md)\n- [Cloudflare Workers AI vs Gemini Developer API](https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-gemini-api.md)\n- [Cloudflare Workers AI vs GroqCloud](https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-groq.md)\n- [Cloudflare Workers AI vs Meta Model API](https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-meta-model-api.md)\n- [Cloudflare Workers AI vs Mistral AI API](https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-mistral-api.md)\n- [Cloudflare Workers AI vs Novita AI](https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-novita-ai.md)\n- [Cloudflare Workers AI vs OpenAI API](https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-openai-api.md)\n- [Cloudflare Workers AI vs OpenRouter](https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-openrouter.md)\n- [Cloudflare Workers AI vs Prism Inference](https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-prism-inference.md)\n- [Cloudflare Workers AI vs RouterPlus](https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-routerplus.md)\n- [Cloudflare Workers AI vs SambaCloud](https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-sambanova.md)\n- [Cloudflare Workers AI vs SiliconFlow](https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-siliconflow.md)\n- [Cloudflare Workers AI vs StepFun API](https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-stepfun-api.md)\n- [Cohere Chat API (Command models) vs Muse Spark Open](https://www.anchorterminal.com/compare/cohere-chat-vs-muse-spark-open.md)\n- [DeepInfra vs Muse Spark Open](https://www.anchorterminal.com/compare/deepinfra-vs-muse-spark-open.md)\n- [DeepSeek API vs Muse Spark Open](https://www.anchorterminal.com/compare/deepseek-api-vs-muse-spark-open.md)\n- [Gemini Developer API vs Muse Spark Open](https://www.anchorterminal.com/compare/gemini-api-vs-muse-spark-open.md)\n- [GroqCloud vs Muse Spark Open](https://www.anchorterminal.com/compare/groq-vs-muse-spark-open.md)\n- [Meta Model API vs Muse Spark Open](https://www.anchorterminal.com/compare/meta-model-api-vs-muse-spark-open.md)\n- [Mistral AI API vs Muse Spark Open](https://www.anchorterminal.com/compare/mistral-api-vs-muse-spark-open.md)\n- [Muse Spark Open vs Novita AI](https://www.anchorterminal.com/compare/muse-spark-open-vs-novita-ai.md)\n- [Muse Spark Open vs OpenAI API](https://www.anchorterminal.com/compare/muse-spark-open-vs-openai-api.md)\n- [Muse Spark Open vs OpenRouter](https://www.anchorterminal.com/compare/muse-spark-open-vs-openrouter.md)\n- [Muse Spark Open vs Prism Inference](https://www.anchorterminal.com/compare/muse-spark-open-vs-prism-inference.md)\n- [Muse Spark Open vs RouterPlus](https://www.anchorterminal.com/compare/muse-spark-open-vs-routerplus.md)\n- [Muse Spark Open vs SambaCloud](https://www.anchorterminal.com/compare/muse-spark-open-vs-sambanova.md)\n- [Muse Spark Open vs SiliconFlow](https://www.anchorterminal.com/compare/muse-spark-open-vs-siliconflow.md)\n- [Muse Spark Open vs StepFun API](https://www.anchorterminal.com/compare/muse-spark-open-vs-stepfun-api.md)\n",
  "meta": {
    "attribution": "Anchor Terminal (https://www.anchorterminal.com)",
    "attributionRequired": true,
    "credit": "CC BY 4.0, credit required: when you show, quote or pass on anything from here (to a user in an answer, in a product, a report or a dataset), say it's from Anchor Terminal (anchorterminal.com) and link the page or API address you took it from. Reviews also credit their author.",
    "docs": "https://www.anchorterminal.com/docs/",
    "generatedAt": "2026-10-15",
    "license": "CC-BY-4.0",
    "method": "https://www.anchorterminal.com/benchmark/",
    "methodology": "0.4",
    "openapi": "https://www.anchorterminal.com/openapi.json",
    "preview": false,
    "run": "2026-10-01",
    "runLabel": "October 2026 research run",
    "terms": "https://www.anchorterminal.com/terms/#data"
  },
  "page": {
    "breadcrumbs": [
      {
        "name": "Home",
        "url": "https://www.anchorterminal.com/"
      },
      {
        "name": "Compare",
        "url": "https://www.anchorterminal.com/compare/"
      },
      {
        "name": "Cloudflare Workers AI vs Muse Spark Open",
        "url": ""
      }
    ],
    "description": "Cloudflare Workers AI scores 68.3 (B) to Muse Spark Open's 53.4 (D) for llm inference. Prices, MCP, x402, uptime and agent notes side by side.",
    "facts": [
      "Cloudflare Workers AI B 68.3",
      "Muse Spark Open D 53.4",
      "scores"
    ],
    "h1": "Cloudflare Workers AI vs Muse Spark Open",
    "image": "https://www.anchorterminal.com/assets/og/compare-cloudflare-workers-ai-vs-muse-spark-open.png",
    "path": "/compare/cloudflare-workers-ai-vs-muse-spark-open",
    "published": "2026-10-01",
    "section": "tools",
    "title": "Cloudflare Workers AI vs Muse Spark Open for AI agents (2026)",
    "toc": null,
    "updated": "2026-10-15",
    "url": "https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-muse-spark-open"
  },
  "tokens": {
    "markdown": 3200,
    "slim": 830
  },
  "version": 1
}
