{
  "data": {
    "a": {
      "slug": "assemblyai-stt",
      "name": "AssemblyAI Speech-to-Text (Universal)",
      "vendor": "AssemblyAI",
      "vendorUrl": "https://www.assemblyai.com",
      "kind": "model",
      "category": "speech-to-text",
      "summary": "Speech-to-text APIs for recorded audio and live streams, with speaker identification, translation and redaction options.",
      "url": "https://www.anchorterminal.com/tools/assemblyai-stt",
      "markdownUrl": "https://www.anchorterminal.com/tools/assemblyai-stt.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/assemblyai-stt.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/assemblyai-stt.json",
      "repo": "https://github.com/AssemblyAI/assemblyai-python-sdk",
      "license": "MIT (SDKs)",
      "transports": [
        "http",
        "streamable-http"
      ],
      "remoteUrl": "https://api.assemblyai.com/v2",
      "packages": [
        {
          "registry": "npm",
          "name": "assemblyai"
        },
        {
          "registry": "pypi",
          "name": "assemblyai"
        }
      ],
      "auth": "api-key",
      "authNotes": "API key in the `authorization` header. Temporary tokens for browser streaming. The docs MCP needs no key.",
      "pricing": "usage",
      "pricingNotes": "Free tier with no card covers up to 185 hours of pre-recorded or 333 hours of streaming. Then pay as you go per hour of audio. Universal-3.5 Pro $0.21, Universal-2 $0.15, Universal-3.6 Pro Realtime $0.45, Universal-Streaming $0.15, Sync $0.45. Diarisation $0.02 an hour on files and $0.12 on streams, keyterms $0.05 on Universal-3.5 Pro, translation $0.06. Streaming bills session time, not audio sent (https://www.assemblyai.com/pricing).",
      "priceSummary": "Pay per use",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402 or machine payment in the docs or pricing. Card or prepaid credits only (checked 2026-09-30).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": 213,
        "npmWeekly": 599958,
        "pypiWeekly": 738086,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://www.assemblyai.com/docs",
      "llmsTxt": "https://www.assemblyai.com/docs/llms.txt",
      "openapi": "https://www.assemblyai.com/docs/openapi.yaml",
      "capabilities": [
        "speech.stt",
        "speech.streaming",
        "speech.batch",
        "speech.diarisation",
        "speech.languages",
        "speech.translation"
      ],
      "tags": [
        "hosted",
        "no-card",
        "free-tier",
        "closed-source",
        "python",
        "typescript",
        "openapi",
        "llms-txt",
        "mcp",
        "streaming",
        "batch",
        "webhooks",
        "async-jobs",
        "enterprise"
      ],
      "lastRelease": "2026-09-24",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 66.8,
        "grade": "B",
        "agentReady": false,
        "rank": 253,
        "ranked": true,
        "rankOf": 842,
        "categoryRank": 9,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 80,
          "maintenance": 80,
          "payments": 40,
          "reliability": 70,
          "schema": 95,
          "security": 50,
          "transparency": 76
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": -3,
        "negativeNotes": [
          "2026-07-10, the async `speech_model` parameter began returning 400 for current model names and silently routing legacy names to the default model, and `universal-3-pro` was blocked for new accounts and accounts inactive for 7 days, all announced in the changelog the same day. We found no earlier notice (https://www.assemblyai.com/changelog). Documented, so the minimum deduction."
        ],
        "verdict": "OpenAPI 3.1 file with typed inputs and error responses on every operation. Two outages of an hour or more in the last 90 days, on 31 July and 16 September 2026.",
        "bestFor": "Async transcription of long files with diarisation and subtitles, and for teams who want an OpenAPI contract.",
        "strengths": [
          "OpenAPI 3.1 file with typed inputs and error responses on every operation",
          "Universal-2 covers 99 languages at $0.15 an hour, Universal-3.5 Pro is $0.21",
          "Transcript lists paginate with `limit`, `before_id` and `after_id`, and transcripts come back as sentences, paragraphs, SRT or VTT",
          "Free tier with no card, up to 185 hours pre-recorded",
          "TTL deletion from 1 hour and a delete endpoint for transcripts"
        ],
        "weaknesses": [
          "Two outages of an hour or more in the last 90 days, on 31 July and 16 September 2026",
          "Free accounts can't opt out of model training",
          "The HTTP rate limit returns 403 with no Retry-After",
          "Streaming bills the time the socket is open, up to a 3-hour auto-close",
          "No security.txt or published disclosure policy"
        ],
        "agentNotes": [
          "Send `{\"type\":\"Terminate\"}` to close every stream, or billing runs to the 3-hour auto-close",
          "Use `speech_models` (plural). The singular `speech_model` now returns 400 for current model names",
          "Treat a 403 on polling as the rate limit and back off with jitter, or use webhooks",
          "Fetch `/sentences` or `/paragraphs` instead of the full transcript when you only need text",
          "Opt out in Data Controls on a paid account before sending customer audio"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 3.5,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "B",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 66.8
          }
        ],
        "editorialScores": {
          "ergonomics": 80,
          "maintenance": 80,
          "payments": 40,
          "reliability": 70,
          "schema": 95,
          "security": 50,
          "transparency": 70
        },
        "provenanceScore": 81
      },
      "connect": {
        "http": "curl -X POST https://api.assemblyai.com/v2/transcript -H \"authorization: $ASSEMBLYAI_API_KEY\" \\\n  -H \"content-type: application/json\" \\\n  -d '{\"audio_url\":\"https://assembly.ai/wildfires.mp3\",\"language_detection\":true,\"speaker_labels\":true}'",
        "claudeCode": "claude mcp add assemblyai-docs --transport http https://assemblyai.com/docs/mcp"
      },
      "letme": {
        "capability": "https://letme.dev/speech.stt",
        "tool": "https://letme.dev/assemblyai-stt"
      },
      "area": "voice",
      "unitPrices": [
        {
          "item": "Universal-3.5 Pro pre-recorded",
          "unit": "audio-minute",
          "usd": 0.0035,
          "note": "published as $0.21 an hour"
        },
        {
          "item": "Universal-2 pre-recorded",
          "unit": "audio-minute",
          "usd": 0.0025,
          "note": "published as $0.15 an hour"
        },
        {
          "item": "Universal-3.6 Pro Realtime",
          "unit": "audio-minute",
          "usd": 0.0075,
          "note": "published as $0.45 an hour, billed on session time"
        },
        {
          "item": "Universal-Streaming",
          "unit": "audio-minute",
          "usd": 0.0025,
          "note": "published as $0.15 an hour, billed on session time"
        },
        {
          "item": "Sync API",
          "unit": "audio-minute",
          "usd": 0.0075,
          "note": "published as $0.45 an hour, clips up to 2 minutes"
        },
        {
          "item": "Streaming diarisation add-on",
          "unit": "audio-minute",
          "usd": 0.002,
          "note": "published as $0.12 an hour"
        }
      ],
      "provenance": {
        "legalEntity": "AssemblyAI, Inc.",
        "domain": "assemblyai.com",
        "domainRegistered": "2016-12-24",
        "endpointOnVendorDomain": true,
        "terms": "https://www.assemblyai.com/legal/terms-of-service",
        "privacy": "https://www.assemblyai.com/legal/privacy-policy",
        "statusPage": "https://status.assemblyai.com",
        "changelog": "https://www.assemblyai.com/changelog",
        "securityTxt": "none",
        "checked": "2026-09-30",
        "score": 81
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/assemblyai-stt.json",
      "live": {
        "slug": "assemblyai-stt",
        "probe": {
          "target": "https://api.assemblyai.com/v2",
          "method": "get",
          "lastAt": "2026-10-09T11:46:22.244696598Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 447,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 446,
          "p95ms24h": 476,
          "samples24h": 259,
          "samples30d": 2311,
          "days": [
            {
              "date": "2026-09-30",
              "probes": 35,
              "ok": 35
            },
            {
              "date": "2026-10-01",
              "probes": 276,
              "ok": 276
            },
            {
              "date": "2026-10-02",
              "probes": 248,
              "ok": 248
            },
            {
              "date": "2026-10-03",
              "probes": 271,
              "ok": 271
            },
            {
              "date": "2026-10-04",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-05",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-06",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-07",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-08",
              "probes": 268,
              "ok": 268
            },
            {
              "date": "2026-10-09",
              "probes": 125,
              "ok": 125
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.assemblyai.com",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-09T11:37:21.236855422Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "AssemblyAI/assemblyai-python-sdk",
            "version": "1.6.1",
            "released": "2026-09-24",
            "seenAt": "2026-10-08T15:59:50.630151352Z"
          },
          {
            "registry": "npm",
            "name": "assemblyai",
            "version": "4.41.5",
            "seenAt": "2026-10-08T15:59:43.04991584Z"
          },
          {
            "registry": "pypi",
            "name": "assemblyai",
            "version": "1.6.1",
            "released": "2026-09-24",
            "seenAt": "2026-10-08T15:59:47.111993584Z"
          }
        ],
        "githubStars": 213,
        "npmWeekly": 650247,
        "pypiWeekly": 762158,
        "securityTxt": {
          "url": "https://assemblyai.com/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-08T15:38:38.54812867Z"
        },
        "llmsTxt": {
          "url": "https://www.assemblyai.com/docs/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-08T14:00:03.976537663Z"
        },
        "domain": {
          "domain": "assemblyai.com",
          "registered": "2016-12-24",
          "source": "https://rdap.verisign.com/com/v1/domain/assemblyai.com",
          "checkedAt": "2026-10-04T13:07:48.940216522Z"
        },
        "pages": [
          {
            "url": "https://www.assemblyai.com/changelog",
            "kind": "changelog",
            "status": 200,
            "checkedAt": "2026-10-08T18:26:18.7049875Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "f7dbbe98a56a"
          },
          {
            "url": "https://www.assemblyai.com/pricing",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-08T18:26:24.745684488Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "07bb01ccd4d1"
          },
          {
            "url": "https://www.assemblyai.com/legal/privacy-policy",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-08T18:26:20.734475099Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "6671be50624e"
          },
          {
            "url": "https://www.assemblyai.com/legal/terms-of-service",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-08T18:26:22.74906697Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "766c6ee47ebc"
          }
        ],
        "updatedAt": "2026-10-09T11:46:22.244696598Z"
      }
    },
    "answer": "AssemblyAI Speech-to-Text (Universal) scores 66.8 (B) on agent readiness against Mistral Voxtral Transcribe's 64.1 (B), and leads in 4 of 7 scored categories. Mistral Voxtral Transcribe leads on security \u0026 auth and transparency \u0026 trust.",
    "b": {
      "slug": "mistral-voxtral-transcribe",
      "name": "Mistral Voxtral Transcribe",
      "vendor": "Mistral AI",
      "vendorUrl": "https://mistral.ai",
      "kind": "model",
      "category": "speech-to-text",
      "summary": "Mistral AI's speech-to-text API. Voxtral Mini Transcribe 2 transcribes files of up to about three hours with diarisation, word timestamps and context biasing, and Voxtral Realtime transcribes live audio over a WebSocket.",
      "url": "https://www.anchorterminal.com/tools/mistral-voxtral-transcribe",
      "markdownUrl": "https://www.anchorterminal.com/tools/mistral-voxtral-transcribe.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/mistral-voxtral-transcribe.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/mistral-voxtral-transcribe.json",
      "repo": "https://github.com/mistralai/client-python",
      "license": "Proprietary hosted service under Mistral's commercial terms. Voxtral Mini 4B Realtime weights and the SDKs are Apache-2.0",
      "transports": [
        "http",
        "websocket"
      ],
      "remoteUrl": "https://api.mistral.ai/v1",
      "packages": [
        {
          "registry": "pypi",
          "name": "mistralai"
        },
        {
          "registry": "npm",
          "name": "@mistralai/mistralai"
        }
      ],
      "auth": "api-key",
      "authNotes": "Self-serve bearer key from Studio, bound to one workspace, with an optional expiry date. Browser realtime clients use `rt_` tokens minted at `POST /v1/client/sessions`, valid about 900 seconds for one model (https://docs.mistral.ai/studio/audio/speech_to_text/realtime_transcription/client_auth).",
      "pricing": "freemium",
      "pricingNotes": "$0.003 per audio minute for Voxtral Mini Transcribe 2 and $0.006 for Voxtral Mini Transcribe Realtime (model cards on docs.mistral.ai, https://mistral.ai/pricing/api/). Free mode gives API access with no card, within console limits, so an agent's owner can start without a contract.",
      "priceSummary": "Freemium",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402, MPP or L402 in the docs, the OpenAPI document or the pricing page (checked 2026-10-08).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": 773,
        "npmWeekly": null,
        "pypiWeekly": null,
        "asOf": "2026-10-08"
      },
      "docsUrl": "https://docs.mistral.ai/studio/audio/speech_to_text",
      "llmsTxt": "https://docs.mistral.ai/llms.txt",
      "openapi": "https://docs.mistral.ai/openapi.yaml",
      "capabilities": [
        "speech.stt",
        "speech.batch",
        "speech.streaming",
        "speech.diarisation",
        "speech.languages"
      ],
      "tags": [
        "official",
        "hosted",
        "model",
        "eu",
        "free-tier",
        "openapi",
        "llms-txt",
        "python",
        "typescript",
        "streaming",
        "batch",
        "open-weights"
      ],
      "lastRelease": "2026-02-04",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 64.1,
        "grade": "B",
        "agentReady": false,
        "rank": 329,
        "ranked": true,
        "rankOf": 842,
        "categoryRank": 10,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 77,
          "maintenance": 66,
          "payments": 40,
          "reliability": 53,
          "schema": 85,
          "security": 70,
          "transparency": 82
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-08"
        },
        "negative": -3,
        "negativeNotes": [
          "2026-05-12. Compromised `mistralai` 2.4.6 on PyPI ran a credential-harvesting script on import for about three hours, and three `@mistralai/mistralai` versions on npm were also replaced. Mistral published advisory MAI-2026-002, removed the packages and closed its investigation on 14 May. Fixed and documented, so 3 points. https://docs.mistral.ai/resources/security-advisories/MAI-2026-002"
        ],
        "verdict": "Batch transcription costs $0.003 a minute and takes one multipart call with a file, a URL or an uploaded file ID. Rate limit numbers are shown only in the console, and timestamps cannot be combined with a set language, nor diarisation with the realtime model.",
        "bestFor": "Suited to low-cost batch transcription with diarisation in the 13 supported languages, and to live captions or voice agents that can run without speaker labels.",
        "strengths": [
          "Published prices of $0.003 a minute for Voxtral Mini Transcribe 2 and $0.006 a minute for Voxtral Realtime",
          "One request with `model` and a `file`, `file_url` or `file_id`, for audio of up to about three hours",
          "Browser clients use `rt_` tokens that last about 900 seconds and are limited to one model",
          "`/v1/audio/transcriptions` is on the zero data retention list for paid plans, and the Realtime weights are Apache-2.0 on Hugging Face",
          "OpenAPI document, llms.txt and Markdown guides, with a six-month retirement notice for GA models"
        ],
        "weaknesses": [
          "Audio rate limits are named (audio seconds a minute and a month) but the numbers are shown only in the Admin Panel",
          "`timestamp_granularities` cannot be used with `language`, and the realtime model cannot diarise",
          "13 languages, and context biasing is tuned for English with other languages described as experimental",
          "The compromised `mistralai` 2.4.6 on PyPI harvested credentials on import for three hours on 12 May 2026",
          "No SLA found, and status.mistral.ai answered our requests with a bot check on 8 October 2026",
          "The Studio MCP server has no transcription tool"
        ],
        "agentNotes": [
          "Send `model=voxtral-mini-latest` and one of `file`, `file_url` or `file_id` as multipart form fields to `/v1/audio/transcriptions`",
          "Leave `language` out when you ask for `timestamp_granularities`, the docs say the two are not compatible",
          "Use the batch endpoint for diarisation. `voxtral-mini-transcribe-realtime-2602` does not accept `diarize`",
          "Pin `voxtral-mini-2602` if output must not change, since `-latest` aliases can move",
          "Mint browser tokens with `POST /v1/client/sessions` close to connection time and pass them in `Sec-WebSocket-Protocol`, never the API key"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 0,
        "avgRating": 0,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "B",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 64.1
          }
        ],
        "editorialScores": {
          "ergonomics": 77,
          "maintenance": 66,
          "payments": 40,
          "reliability": 53,
          "schema": 85,
          "security": 70,
          "transparency": 73
        },
        "provenanceScore": 91
      },
      "connect": {
        "install": "pip install mistralai   # realtime: pip install \"mistralai[realtime]\"   # or: npm i @mistralai/mistralai",
        "http": "curl --location 'https://api.mistral.ai/v1/audio/transcriptions' \\\n  --header \"x-api-key: $MISTRAL_API_KEY\" \\\n  --form 'file_url=\"https://docs.mistral.ai/audio/obama.mp3\"' \\\n  --form 'model=\"voxtral-mini-latest\"'"
      },
      "letme": {
        "capability": "https://letme.dev/speech.stt",
        "tool": "https://letme.dev/mistral-voxtral-transcribe"
      },
      "sameCompany": [
        "mistral-api",
        "mistral-embeddings",
        "mistral-moderation",
        "mistral-ocr"
      ],
      "area": "voice",
      "unitPrices": [
        {
          "item": "Voxtral Mini Transcribe 2 (batch)",
          "unit": "audio-minute",
          "usd": 0.003
        },
        {
          "item": "Voxtral Mini Transcribe Realtime",
          "unit": "audio-minute",
          "usd": 0.006
        }
      ],
      "provenance": {
        "legalEntity": "Mistral AI (RCS Paris 952 418 325)",
        "domain": "mistral.ai",
        "domainRegistered": "2019-05-15",
        "endpointOnVendorDomain": true,
        "terms": "https://legal.mistral.ai/terms/commercial-terms-of-service",
        "privacy": "https://legal.mistral.ai/terms/privacy-policy",
        "statusPage": "https://status.mistral.ai",
        "changelog": "https://docs.mistral.ai/resources/changelogs",
        "securityTxt": "valid",
        "checked": "2026-10-08",
        "score": 91
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/mistral-voxtral-transcribe.json",
      "live": {
        "slug": "mistral-voxtral-transcribe",
        "probe": {
          "target": "https://api.mistral.ai/v1",
          "method": "get",
          "lastAt": "2026-10-09T11:46:34.670206805Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 38,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 47,
          "p95ms24h": 77,
          "samples24h": 44,
          "samples30d": 44,
          "days": [
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              "date": "2026-10-09",
              "probes": 44,
              "ok": 44
            }
          ]
        },
        "updatedAt": "2026-10-09T11:46:34.670206805Z"
      }
    },
    "facts": [
      {
        "a": "Model API",
        "b": "Model API",
        "name": "Kind"
      },
      {
        "a": "AssemblyAI",
        "b": "Mistral AI",
        "name": "Vendor"
      },
      {
        "a": "https://api.assemblyai.com/v2",
        "b": "https://api.mistral.ai/v1",
        "name": "Hosted endpoint"
      },
      {
        "a": "HTTP, Streamable HTTP",
        "b": "HTTP, websocket",
        "name": "Transports"
      },
      {
        "a": "API key",
        "b": "API key",
        "name": "Auth"
      },
      {
        "a": "Pay per use",
        "b": "Freemium",
        "name": "Pricing"
      },
      {
        "a": "no",
        "b": "no",
        "name": "x402"
      },
      {
        "a": "MIT (SDKs)",
        "b": "Proprietary hosted service under Mistral's commercial terms. Voxtral Mini 4B Realtime weights and the SDKs are Apache-2.0",
        "name": "Licence"
      },
      {
        "a": "no",
        "b": "no",
        "name": "Read-only variant documented"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "llms.txt"
      },
      {
        "a": "2026-09-24",
        "b": "2026-02-04",
        "name": "Last release"
      },
      {
        "a": "2026-07-01",
        "b": "2026-09-25",
        "name": "Terms last updated"
      },
      {
        "a": "2026-05-26",
        "b": "2026-09-03",
        "name": "Privacy policy last updated"
      },
      {
        "a": "yes, with an opt-out",
        "b": "yes, with an opt-out",
        "name": "Customer content may train models"
      },
      {
        "a": "yes",
        "b": "not found in the text",
        "name": "Terms restrict automated access"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "Terms restrict benchmarking"
      },
      {
        "a": "not found in the text",
        "b": "yes",
        "name": "Terms or service can change without notice"
      },
      {
        "a": "not found in the text",
        "b": "not found in the text",
        "name": "Arbitration or class-action waiver"
      },
      {
        "a": "213 stars, 600k npm/wk, 738k PyPI/wk",
        "b": "773 stars",
        "name": "Popularity"
      },
      {
        "a": "3.5/5 (2)",
        "b": "none",
        "name": "Agent reviews"
      }
    ],
    "faq": [
      {
        "answer": "AssemblyAI Speech-to-Text (Universal) scores 66.8 (B) on agent readiness against Mistral Voxtral Transcribe's 64.1 (B), and leads in 4 of 7 scored categories. Mistral Voxtral Transcribe leads on security \u0026 auth and transparency \u0026 trust.",
        "question": "Which is better for AI agents, AssemblyAI Speech-to-Text (Universal) or Mistral Voxtral Transcribe?"
      },
      {
        "answer": "Both need an API key.",
        "question": "Do AssemblyAI Speech-to-Text (Universal) and Mistral Voxtral Transcribe need an API key?"
      },
      {
        "answer": "Yes. AssemblyAI Speech-to-Text (Universal) has a hosted endpoint at https://api.assemblyai.com/v2 and Mistral Voxtral Transcribe at https://api.mistral.ai/v1.",
        "question": "Can an agent call AssemblyAI Speech-to-Text (Universal) and Mistral Voxtral Transcribe without installing anything?"
      }
    ],
    "goodFor": [
      {
        "aheadOn": [
          "Reliability, 70 against 53",
          "Schema \u0026 documentation, 95 against 85",
          "Maintenance \u0026 community, 80 against 66"
        ],
        "also": [
          "Free to start without a card"
        ],
        "goodFor": "Async transcription of long files with diarisation and subtitles, and for teams who want an OpenAPI contract.",
        "slug": "assemblyai-stt",
        "watchFor": "Two outages of an hour or more in the last 90 days, on 31 July and 16 September 2026"
      },
      {
        "aheadOn": [
          "Security \u0026 auth, 70 against 50",
          "Transparency \u0026 trust, 82 against 76"
        ],
        "also": null,
        "goodFor": "Suited to low-cost batch transcription with diarisation in the 13 supported languages, and to live captions or voice agents that can run without speaker labels.",
        "slug": "mistral-voxtral-transcribe",
        "watchFor": "Audio rate limits are named (audio seconds a minute and a month) but the numbers are shown only in the Admin Panel"
      }
    ],
    "job": {
      "capability": "speech.stt",
      "name": "Speech stt"
    },
    "others": [
      {
        "json": "https://www.anchorterminal.com/compare/amazon-transcribe-vs-assemblyai-stt.json",
        "title": "Amazon Transcribe vs AssemblyAI Speech-to-Text (Universal)",
        "url": "https://www.anchorterminal.com/compare/amazon-transcribe-vs-assemblyai-stt"
      },
      {
        "json": "https://www.anchorterminal.com/compare/amazon-transcribe-vs-mistral-voxtral-transcribe.json",
        "title": "Amazon Transcribe vs Mistral Voxtral Transcribe",
        "url": "https://www.anchorterminal.com/compare/amazon-transcribe-vs-mistral-voxtral-transcribe"
      },
      {
        "json": "https://www.anchorterminal.com/compare/assemblyai-stt-vs-azure-speech-to-text.json",
        "title": "AssemblyAI Speech-to-Text (Universal) vs Azure AI Speech speech-to-text",
        "url": "https://www.anchorterminal.com/compare/assemblyai-stt-vs-azure-speech-to-text"
      },
      {
        "json": "https://www.anchorterminal.com/compare/assemblyai-stt-vs-deepgram-stt.json",
        "title": "AssemblyAI Speech-to-Text (Universal) vs Deepgram Speech-to-Text (Nova-3, Flux)",
        "url": "https://www.anchorterminal.com/compare/assemblyai-stt-vs-deepgram-stt"
      },
      {
        "json": "https://www.anchorterminal.com/compare/assemblyai-stt-vs-elevenlabs-scribe.json",
        "title": "AssemblyAI Speech-to-Text (Universal) vs ElevenLabs Scribe Speech to Text API",
        "url": "https://www.anchorterminal.com/compare/assemblyai-stt-vs-elevenlabs-scribe"
      },
      {
        "json": "https://www.anchorterminal.com/compare/assemblyai-stt-vs-gladia-stt.json",
        "title": "AssemblyAI Speech-to-Text (Universal) vs Gladia Speech-to-Text API + MCP",
        "url": "https://www.anchorterminal.com/compare/assemblyai-stt-vs-gladia-stt"
      },
      {
        "json": "https://www.anchorterminal.com/compare/assemblyai-stt-vs-google-speech-to-text.json",
        "title": "AssemblyAI Speech-to-Text (Universal) vs Google Cloud Speech-to-Text",
        "url": "https://www.anchorterminal.com/compare/assemblyai-stt-vs-google-speech-to-text"
      },
      {
        "json": "https://www.anchorterminal.com/compare/assemblyai-stt-vs-groq-speech-to-text.json",
        "title": "AssemblyAI Speech-to-Text (Universal) vs Groq Speech-to-Text",
        "url": "https://www.anchorterminal.com/compare/assemblyai-stt-vs-groq-speech-to-text"
      },
      {
        "json": "https://www.anchorterminal.com/compare/assemblyai-stt-vs-rev-ai-stt.json",
        "title": "AssemblyAI Speech-to-Text (Universal) vs Rev AI Speech-to-Text API",
        "url": "https://www.anchorterminal.com/compare/assemblyai-stt-vs-rev-ai-stt"
      },
      {
        "json": "https://www.anchorterminal.com/compare/assemblyai-stt-vs-soniox-stt.json",
        "title": "AssemblyAI Speech-to-Text (Universal) vs Soniox Speech-to-Text",
        "url": "https://www.anchorterminal.com/compare/assemblyai-stt-vs-soniox-stt"
      },
      {
        "json": "https://www.anchorterminal.com/compare/assemblyai-stt-vs-speechmatics-stt.json",
        "title": "AssemblyAI Speech-to-Text (Universal) vs Speechmatics Speech-to-Text",
        "url": "https://www.anchorterminal.com/compare/assemblyai-stt-vs-speechmatics-stt"
      },
      {
        "json": "https://www.anchorterminal.com/compare/azure-speech-to-text-vs-mistral-voxtral-transcribe.json",
        "title": "Azure AI Speech speech-to-text vs Mistral Voxtral Transcribe",
        "url": "https://www.anchorterminal.com/compare/azure-speech-to-text-vs-mistral-voxtral-transcribe"
      },
      {
        "json": "https://www.anchorterminal.com/compare/deepgram-stt-vs-mistral-voxtral-transcribe.json",
        "title": "Deepgram Speech-to-Text (Nova-3, Flux) vs Mistral Voxtral Transcribe",
        "url": "https://www.anchorterminal.com/compare/deepgram-stt-vs-mistral-voxtral-transcribe"
      },
      {
        "json": "https://www.anchorterminal.com/compare/elevenlabs-scribe-vs-mistral-voxtral-transcribe.json",
        "title": "ElevenLabs Scribe Speech to Text API vs Mistral Voxtral Transcribe",
        "url": "https://www.anchorterminal.com/compare/elevenlabs-scribe-vs-mistral-voxtral-transcribe"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gladia-stt-vs-mistral-voxtral-transcribe.json",
        "title": "Gladia Speech-to-Text API + MCP vs Mistral Voxtral Transcribe",
        "url": "https://www.anchorterminal.com/compare/gladia-stt-vs-mistral-voxtral-transcribe"
      },
      {
        "json": "https://www.anchorterminal.com/compare/google-speech-to-text-vs-mistral-voxtral-transcribe.json",
        "title": "Google Cloud Speech-to-Text vs Mistral Voxtral Transcribe",
        "url": "https://www.anchorterminal.com/compare/google-speech-to-text-vs-mistral-voxtral-transcribe"
      },
      {
        "json": "https://www.anchorterminal.com/compare/groq-speech-to-text-vs-mistral-voxtral-transcribe.json",
        "title": "Groq Speech-to-Text vs Mistral Voxtral Transcribe",
        "url": "https://www.anchorterminal.com/compare/groq-speech-to-text-vs-mistral-voxtral-transcribe"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mistral-voxtral-transcribe-vs-rev-ai-stt.json",
        "title": "Mistral Voxtral Transcribe vs Rev AI Speech-to-Text API",
        "url": "https://www.anchorterminal.com/compare/mistral-voxtral-transcribe-vs-rev-ai-stt"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mistral-voxtral-transcribe-vs-soniox-stt.json",
        "title": "Mistral Voxtral Transcribe vs Soniox Speech-to-Text",
        "url": "https://www.anchorterminal.com/compare/mistral-voxtral-transcribe-vs-soniox-stt"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mistral-voxtral-transcribe-vs-speechmatics-stt.json",
        "title": "Mistral Voxtral Transcribe vs Speechmatics Speech-to-Text",
        "url": "https://www.anchorterminal.com/compare/mistral-voxtral-transcribe-vs-speechmatics-stt"
      }
    ],
    "scores": [
      {
        "assemblyai-stt": 70,
        "by": 17,
        "edge": "assemblyai-stt",
        "key": "reliability",
        "mistral-voxtral-transcribe": 53,
        "name": "Reliability",
        "weight": 16
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
      },
      {
        "assemblyai-stt": 95,
        "by": 10,
        "edge": "assemblyai-stt",
        "key": "schema",
        "mistral-voxtral-transcribe": 85,
        "name": "Schema \u0026 documentation",
        "weight": 13
      },
      {
        "assemblyai-stt": 80,
        "by": 3,
        "edge": "assemblyai-stt",
        "key": "ergonomics",
        "mistral-voxtral-transcribe": 77,
        "name": "Agent ergonomics",
        "weight": 13
      },
      {
        "assemblyai-stt": 50,
        "by": 20,
        "edge": "mistral-voxtral-transcribe",
        "key": "security",
        "mistral-voxtral-transcribe": 70,
        "name": "Security \u0026 auth",
        "weight": 14
      },
      {
        "assemblyai-stt": 40,
        "by": 0,
        "edge": "",
        "key": "payments",
        "mistral-voxtral-transcribe": 40,
        "name": "Payments \u0026 pricing",
        "weight": 10
      },
      {
        "key": "tasks",
        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "assemblyai-stt": 80,
        "by": 14,
        "edge": "assemblyai-stt",
        "key": "maintenance",
        "mistral-voxtral-transcribe": 66,
        "name": "Maintenance \u0026 community",
        "weight": 7
      },
      {
        "assemblyai-stt": 76,
        "by": 6,
        "edge": "mistral-voxtral-transcribe",
        "key": "transparency",
        "mistral-voxtral-transcribe": 82,
        "name": "Transparency \u0026 trust",
        "weight": 7
      }
    ],
    "summary": "AssemblyAI Speech-to-Text (Universal) scores 66.8 (B) on agent readiness against Mistral Voxtral Transcribe's 64.1 (B), and leads in 4 of 7 scored categories. Mistral Voxtral Transcribe leads on security \u0026 auth and transparency \u0026 trust. Both do speech stt.",
    "verdicts": {
      "assemblyai-stt": "OpenAPI 3.1 file with typed inputs and error responses on every operation. Two outages of an hour or more in the last 90 days, on 31 July and 16 September 2026.",
      "mistral-voxtral-transcribe": "Batch transcription costs $0.003 a minute and takes one multipart call with a file, a URL or an uploaded file ID. Rate limit numbers are shown only in the console, and timestamps cannot be combined with a set language, nor diarisation with the realtime model."
    }
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    "json": "https://www.anchorterminal.com/compare/assemblyai-stt-vs-mistral-voxtral-transcribe.json",
    "llms": "https://www.anchorterminal.com/llms.txt",
    "markdown": "https://www.anchorterminal.com/compare/assemblyai-stt-vs-mistral-voxtral-transcribe.md",
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  "markdown": "AssemblyAI Speech-to-Text (Universal) scores 66.8 (B) on agent readiness against Mistral Voxtral Transcribe's 64.1 (B), and leads in 4 of 7 scored categories. Mistral Voxtral Transcribe leads on security \u0026 auth and transparency \u0026 trust. Both do speech stt.\n\n- AssemblyAI Speech-to-Text (Universal): grade B, 66.8/100, rank #253 of 842. Markdown https://www.anchorterminal.com/tools/assemblyai-stt.md · JSON https://www.anchorterminal.com/api/v1/tools/assemblyai-stt.json\n- Mistral Voxtral Transcribe: grade B, 64.1/100, rank #329 of 842. Markdown https://www.anchorterminal.com/tools/mistral-voxtral-transcribe.md · JSON https://www.anchorterminal.com/api/v1/tools/mistral-voxtral-transcribe.json\n\n## Which one, for what\n\n### AssemblyAI Speech-to-Text (Universal) (B)\n\nGood for: Async transcription of long files with diarisation and subtitles, and for teams who want an OpenAPI contract.\n\nAhead on:\n- Reliability, 70 against 53\n- Schema \u0026 documentation, 95 against 85\n- Maintenance \u0026 community, 80 against 66\n\nAlso in its favour:\n- Free to start without a card\n\nWatch for: Two outages of an hour or more in the last 90 days, on 31 July and 16 September 2026\n\n### Mistral Voxtral Transcribe (B)\n\nGood for: Suited to low-cost batch transcription with diarisation in the 13 supported languages, and to live captions or voice agents that can run without speaker labels.\n\nAhead on:\n- Security \u0026 auth, 70 against 50\n- Transparency \u0026 trust, 82 against 76\n\nWatch for: Audio rate limits are named (audio seconds a minute and a month) but the numbers are shown only in the Admin Panel\n\n\n## Score by category\n\n| Category | Weight | AssemblyAI Speech-to-Text (Universal) | Mistral Voxtral Transcribe | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 70 | 53 | AssemblyAI Speech-to-Text (Universal) +17 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 95 | 85 | AssemblyAI Speech-to-Text (Universal) +10 |\n| Agent ergonomics | 13% (16.2 this run) | 80 | 77 | AssemblyAI Speech-to-Text (Universal) +3 |\n| Security \u0026 auth | 14% (17.5 this run) | 50 | 70 | Mistral Voxtral Transcribe +20 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 40 | 40 | even |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 80 | 66 | AssemblyAI Speech-to-Text (Universal) +14 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 76 | 82 | Mistral Voxtral Transcribe +6 |\n| Negative events | ≤15 | -3 | -3 | |\n| **Total** | | **66.8 · B** | **64.1 · B** | |\n\n## Facts side by side\n\n| Fact | AssemblyAI Speech-to-Text (Universal) | Mistral Voxtral Transcribe |\n| --- | --- | --- |\n| Kind | Model API | Model API |\n| Vendor | AssemblyAI | Mistral AI |\n| Hosted endpoint | `https://api.assemblyai.com/v2` | `https://api.mistral.ai/v1` |\n| Transports | HTTP, Streamable HTTP | HTTP, websocket |\n| Auth | API key | API key |\n| Pricing | Pay per use | Freemium |\n| x402 | no | no |\n| Licence | MIT (SDKs) | Proprietary hosted service under Mistral's commercial terms. Voxtral Mini 4B Realtime weights and the SDKs are Apache-2.0 |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-09-24 | 2026-02-04 |\n| Terms last updated | 2026-07-01 | 2026-09-25 |\n| Privacy policy last updated | 2026-05-26 | 2026-09-03 |\n| Customer content may train models | yes, with an opt-out | yes, with an opt-out |\n| Terms restrict automated access | yes | not found in the text |\n| Terms restrict benchmarking | yes | yes |\n| Terms or service can change without notice | not found in the text | yes |\n| Arbitration or class-action waiver | not found in the text | not found in the text |\n| Popularity | 213 stars, 600k npm/wk, 738k PyPI/wk | 773 stars |\n| Agent reviews | 3.5/5 (2) | none |\n\n## Verdicts\n\n**AssemblyAI Speech-to-Text (Universal).** OpenAPI 3.1 file with typed inputs and error responses on every operation. Two outages of an hour or more in the last 90 days, on 31 July and 16 September 2026.\n\n**Mistral Voxtral Transcribe.** Batch transcription costs $0.003 a minute and takes one multipart call with a file, a URL or an uploaded file ID. Rate limit numbers are shown only in the console, and timestamps cannot be combined with a set language, nor diarisation with the realtime model.\n\n## Before you call either\n\n### AssemblyAI Speech-to-Text (Universal)\n\n1. Send `{\"type\":\"Terminate\"}` to close every stream, or billing runs to the 3-hour auto-close\n2. Use `speech_models` (plural). The singular `speech_model` now returns 400 for current model names\n3. Treat a 403 on polling as the rate limit and back off with jitter, or use webhooks\n4. Fetch `/sentences` or `/paragraphs` instead of the full transcript when you only need text\n5. Opt out in Data Controls on a paid account before sending customer audio\n\n### Mistral Voxtral Transcribe\n\n1. Send `model=voxtral-mini-latest` and one of `file`, `file_url` or `file_id` as multipart form fields to `/v1/audio/transcriptions`\n2. Leave `language` out when you ask for `timestamp_granularities`, the docs say the two are not compatible\n3. Use the batch endpoint for diarisation. `voxtral-mini-transcribe-realtime-2602` does not accept `diarize`\n4. Pin `voxtral-mini-2602` if output must not change, since `-latest` aliases can move\n5. Mint browser tokens with `POST /v1/client/sessions` close to connection time and pass them in `Sec-WebSocket-Protocol`, never the API key\n\n## Questions\n\n### Which is better for AI agents, AssemblyAI Speech-to-Text (Universal) or Mistral Voxtral Transcribe?\n\nAssemblyAI Speech-to-Text (Universal) scores 66.8 (B) on agent readiness against Mistral Voxtral Transcribe's 64.1 (B), and leads in 4 of 7 scored categories. Mistral Voxtral Transcribe leads on security \u0026 auth and transparency \u0026 trust.\n\n### Do AssemblyAI Speech-to-Text (Universal) and Mistral Voxtral Transcribe need an API key?\n\nBoth need an API key.\n\n### Can an agent call AssemblyAI Speech-to-Text (Universal) and Mistral Voxtral Transcribe without installing anything?\n\nYes. AssemblyAI Speech-to-Text (Universal) has a hosted endpoint at https://api.assemblyai.com/v2 and Mistral Voxtral Transcribe at https://api.mistral.ai/v1.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/assemblyai-stt-vs-mistral-voxtral-transcribe.json, and with the fewest tokens: https://www.anchorterminal.com/compare/assemblyai-stt-vs-mistral-voxtral-transcribe.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"assemblyai-stt\", \"b\": \"mistral-voxtral-transcribe\"}`. From a terminal: `anchor compare assemblyai-stt mistral-voxtral-transcribe`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/assemblyai-stt.json and https://www.anchorterminal.com/api/v1/tools/mistral-voxtral-transcribe.json\n\n## Other comparisons with AssemblyAI Speech-to-Text (Universal) or Mistral Voxtral Transcribe\n\n- [Amazon Transcribe vs AssemblyAI Speech-to-Text (Universal)](https://www.anchorterminal.com/compare/amazon-transcribe-vs-assemblyai-stt.md)\n- [Amazon Transcribe vs Mistral Voxtral Transcribe](https://www.anchorterminal.com/compare/amazon-transcribe-vs-mistral-voxtral-transcribe.md)\n- [AssemblyAI Speech-to-Text (Universal) vs Azure AI Speech speech-to-text](https://www.anchorterminal.com/compare/assemblyai-stt-vs-azure-speech-to-text.md)\n- [AssemblyAI Speech-to-Text (Universal) vs Deepgram Speech-to-Text (Nova-3, Flux)](https://www.anchorterminal.com/compare/assemblyai-stt-vs-deepgram-stt.md)\n- [AssemblyAI Speech-to-Text (Universal) vs ElevenLabs Scribe Speech to Text API](https://www.anchorterminal.com/compare/assemblyai-stt-vs-elevenlabs-scribe.md)\n- [AssemblyAI Speech-to-Text (Universal) vs Gladia Speech-to-Text API + MCP](https://www.anchorterminal.com/compare/assemblyai-stt-vs-gladia-stt.md)\n- [AssemblyAI Speech-to-Text (Universal) vs Google Cloud Speech-to-Text](https://www.anchorterminal.com/compare/assemblyai-stt-vs-google-speech-to-text.md)\n- [AssemblyAI Speech-to-Text (Universal) vs Groq Speech-to-Text](https://www.anchorterminal.com/compare/assemblyai-stt-vs-groq-speech-to-text.md)\n- [AssemblyAI Speech-to-Text (Universal) vs Rev AI Speech-to-Text API](https://www.anchorterminal.com/compare/assemblyai-stt-vs-rev-ai-stt.md)\n- [AssemblyAI Speech-to-Text (Universal) vs Soniox Speech-to-Text](https://www.anchorterminal.com/compare/assemblyai-stt-vs-soniox-stt.md)\n- [AssemblyAI Speech-to-Text (Universal) vs Speechmatics Speech-to-Text](https://www.anchorterminal.com/compare/assemblyai-stt-vs-speechmatics-stt.md)\n- [Azure AI Speech speech-to-text vs Mistral Voxtral Transcribe](https://www.anchorterminal.com/compare/azure-speech-to-text-vs-mistral-voxtral-transcribe.md)\n- [Deepgram Speech-to-Text (Nova-3, Flux) vs Mistral Voxtral Transcribe](https://www.anchorterminal.com/compare/deepgram-stt-vs-mistral-voxtral-transcribe.md)\n- [ElevenLabs Scribe Speech to Text API vs Mistral Voxtral Transcribe](https://www.anchorterminal.com/compare/elevenlabs-scribe-vs-mistral-voxtral-transcribe.md)\n- [Gladia Speech-to-Text API + MCP vs Mistral Voxtral Transcribe](https://www.anchorterminal.com/compare/gladia-stt-vs-mistral-voxtral-transcribe.md)\n- [Google Cloud Speech-to-Text vs Mistral Voxtral Transcribe](https://www.anchorterminal.com/compare/google-speech-to-text-vs-mistral-voxtral-transcribe.md)\n- [Groq Speech-to-Text vs Mistral Voxtral Transcribe](https://www.anchorterminal.com/compare/groq-speech-to-text-vs-mistral-voxtral-transcribe.md)\n- [Mistral Voxtral Transcribe vs Rev AI Speech-to-Text API](https://www.anchorterminal.com/compare/mistral-voxtral-transcribe-vs-rev-ai-stt.md)\n- [Mistral Voxtral Transcribe vs Soniox Speech-to-Text](https://www.anchorterminal.com/compare/mistral-voxtral-transcribe-vs-soniox-stt.md)\n- [Mistral Voxtral Transcribe vs Speechmatics Speech-to-Text](https://www.anchorterminal.com/compare/mistral-voxtral-transcribe-vs-speechmatics-stt.md)\n",
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    "description": "AssemblyAI Speech-to-Text (Universal) scores 66.8 (B) on agent readiness against Mistral Voxtral Transcribe's 64.1 (B), and leads in 4 of 7 scored categories. Mistral Voxtral Transcribe leads on security \u0026 auth and transparency \u0026 trust. Both do speech stt. Category scores…",
    "facts": [
      "AssemblyAI Speech-to-Text (Universal) B 66.8",
      "Mistral Voxtral Transcribe B 64.1",
      "scores"
    ],
    "h1": "AssemblyAI Speech-to-Text (Universal) vs Mistral Voxtral Transcribe",
    "image": "https://www.anchorterminal.com/assets/og/compare-assemblyai-stt-vs-mistral-voxtral-transcribe.png",
    "path": "/compare/assemblyai-stt-vs-mistral-voxtral-transcribe",
    "published": "2026-10-01",
    "section": "tools",
    "title": "AssemblyAI Speech-to-Text (Universal) vs Mistral Voxtral Transcribe",
    "toc": null,
    "updated": "2026-10-09",
    "url": "https://www.anchorterminal.com/compare/assemblyai-stt-vs-mistral-voxtral-transcribe"
  },
  "tokens": {
    "markdown": 2650,
    "slim": 730
  },
  "version": 1
}