{ "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": "Groq Speech-to-Text scores 71.8 (BB) on agent readiness against AssemblyAI Speech-to-Text (Universal)'s 66.8 (B), and leads in 3 of 7 scored categories. AssemblyAI Speech-to-Text (Universal) leads on schema \u0026 documentation, agent ergonomics and maintenance \u0026 community.", "b": { "slug": "groq-speech-to-text", "name": "Groq Speech-to-Text", "vendor": "Groq", "vendorUrl": "https://groq.com", "kind": "model", "category": "speech-to-text", "summary": "Groq's hosted speech-to-text API. It runs OpenAI's Whisper Large v3 and Whisper Large v3 Turbo on OpenAI-compatible transcription and translation endpoints, for uploaded files or audio URLs, with a half-price batch mode.", "url": "https://www.anchorterminal.com/tools/groq-speech-to-text", "markdownUrl": "https://www.anchorterminal.com/tools/groq-speech-to-text.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/groq-speech-to-text.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/groq-speech-to-text.json", "repo": "https://github.com/groq/groq-python", "license": "Proprietary hosted service under the Groq Services Agreement. The SDKs are Apache-2.0 and the Whisper weights are published by OpenAI on Hugging Face", "transports": [ "http" ], "remoteUrl": "https://api.groq.com/openai/v1", "packages": [ { "registry": "pypi", "name": "groq" }, { "registry": "npm", "name": "groq-sdk" } ], "auth": "api-key", "authNotes": "Self-serve bearer key from the GroqCloud console, created inside a project. Projects carry their own rate limits per model, usage data and request logs (https://console.groq.com/docs/projects).", "pricing": "freemium", "pricingNotes": "$0.04 per audio hour for Whisper Large v3 Turbo and $0.111 for Whisper Large v3, with a 10-second minimum a request and 50% off through the Batch API (https://console.groq.com/docs/models). The free plan needs no card, so an agent's owner can start without a contract. The Developer plan is postpaid by card, US bank account or SEPA debit.", "priceSummary": "Freemium", "where": "hosted", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the speech-to-text guide, the API reference or the billing pages (checked 2026-10-08).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": 621, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-10-08" }, "docsUrl": "https://console.groq.com/docs/speech-to-text", "llmsTxt": "https://console.groq.com/llms.txt", "capabilities": [ "speech.stt", "speech.batch", "speech.languages" ], "tags": [ "official", "hosted", "model", "fast", "free-tier", "no-card", "llms-txt", "python", "typescript", "batch", "openai-compatible" ], "lastRelease": "2026-08-26", "graded": true, "anchor": { "graded": true, "score": 71.8, "grade": "BB", "agentReady": true, "rank": 113, "ranked": true, "rankOf": 842, "categoryRank": 3, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 75, "maintenance": 68, "payments": 40, "reliability": 90, "schema": 58, "security": 79, "transparency": 85 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-08" }, "negative": 0, "verdict": "Whisper Large v3 Turbo costs $0.04 an audio hour and Whisper Large v3 $0.111, with a no-card free plan and zero data retention as a self-serve setting. There is no streaming endpoint, no diarisation and no subtitle output, and uploads stop at 25 MB on the free plan and 100 MB on the Developer plan.", "bestFor": "Suited to cheap, fast transcription of recorded files in many languages, and to agents that already hold a Groq key or use an OpenAI-compatible client.", "strengths": [ "Published prices of $0.04 an audio hour for Whisper Large v3 Turbo and $0.111 for Whisper Large v3, with 50% off through the Batch API", "Free plan with no card at 20 requests a minute, 2,000 a day and 7,200 audio seconds an hour on both models", "Inputs and outputs are not retained by default, and zero data retention is a console setting that covers both audio endpoints", "The status page lists each Whisper model as its own component, both at 100% uptime for July to October 2026", "OpenAI-compatible request shape, with `model` and a `file` or `url` as the only required fields" ], "weaknesses": [ "No streaming or realtime endpoint and no diarisation in the reviewed documentation", "Uploads are capped at 25 MB on the free plan and 100 MB on the Developer plan, so long recordings need client-side chunking", "`srt` and `vtt` response formats are not supported, and Whisper Large v3 Turbo cannot translate", "No OpenAPI document was found, and the docs changelog's newest entry is dated 18 April", "The 99.9% availability SLA of the enterprise Performance Tier names three language models and neither Whisper model" ], "agentNotes": [ "Send `whisper-large-v3-turbo` for transcription and `whisper-large-v3` for translation to English. The translations endpoint does not accept Turbo.", "Pass `url` instead of `file` for audio over 25 MB, and split anything over the plan's size limit into overlapping chunks before sending.", "Set `response_format` to `verbose_json` before asking for `timestamp_granularities[]`. Word timestamps add latency, segment timestamps do not.", "Every request is billed as at least 10 seconds of audio, so join very short clips where the task allows.", "Read `retry-after` on a 429 and back off. Audio limits count seconds an hour and a day as well as requests." ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "BB", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 71.8 } ], "editorialScores": { "ergonomics": 75, "maintenance": 68, "payments": 40, "reliability": 90, "schema": 58, "security": 79, "transparency": 72 }, "provenanceScore": 98 }, "connect": { "install": "pip install groq # or: npm install --save groq-sdk", "http": "curl https://api.groq.com/openai/v1/audio/transcriptions \\\n -H \"Authorization: Bearer $GROQ_API_KEY\" \\\n -H \"Content-Type: multipart/form-data\" \\\n -F file=\"@./sample_audio.m4a\" \\\n -F model=\"whisper-large-v3\"" }, "letme": { "capability": "https://letme.dev/speech.stt", "tool": "https://letme.dev/groq-speech-to-text" }, "sameCompany": [ "groq" ], "area": "voice", "unitPrices": [ { "item": "Whisper Large v3 Turbo ($0.04 an audio hour)", "unit": "audio-minute", "usd": 0.000667 }, { "item": "Whisper Large v3 ($0.111 an audio hour)", "unit": "audio-minute", "usd": 0.00185 } ], "provenance": { "legalEntity": "Groq LLC", "domain": "groq.com", "domainRegistered": "2007-07-22", "domainNote": "The registration date is per the 26 September check of the GroqCloud listing and was not re-read on 8 October. groq.com was registered before Groq existed. Customers in the EEA and Switzerland contract with Groq UK Limited.", "endpointOnVendorDomain": true, "terms": "https://console.groq.com/docs/legal/services-agreement", "privacy": "https://groq.com/privacy-policy", "statusPage": "https://groqstatus.com", "changelog": "https://console.groq.com/docs/changelog", "securityTxt": "valid", "checked": "2026-10-08", "score": 98 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/groq-speech-to-text.json", "live": { "slug": "groq-speech-to-text", "probe": { "target": "https://api.groq.com/openai/v1", "method": "get", "lastAt": "2026-10-09T11:46:30.043120416Z", "lastOk": true, "lastStatus": 404, "lastMs": 248, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 201, "p95ms24h": 227, "samples24h": 44, "samples30d": 44, "days": [ { "date": "2026-10-09", "probes": 44, "ok": 44 } ] }, "vendorStatus": { "page": "https://groqstatus.com", "indicator": "none", "summary": "All Systems Operational", "checkedAt": "2026-10-09T11:39:30.337938661Z" }, "updatedAt": "2026-10-09T11:46:30.043120416Z" } }, "facts": [ { "a": "Model API", "b": "Model API", "name": "Kind" }, { "a": "AssemblyAI", "b": "Groq", "name": "Vendor" }, { "a": "https://api.assemblyai.com/v2", "b": "https://api.groq.com/openai/v1", "name": "Hosted endpoint" }, { "a": "HTTP, Streamable HTTP", "b": "HTTP", "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 the Groq Services Agreement. The SDKs are Apache-2.0 and the Whisper weights are published by OpenAI on Hugging Face", "name": "Licence" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "yes", "name": "llms.txt" }, { "a": "2026-09-24", "b": "2026-08-26", "name": "Last release" }, { "a": "2026-07-01", "b": "2026-06-22", "name": "Terms last updated" }, { "a": "2026-05-26", "b": "2025-11-12", "name": "Privacy policy last updated" }, { "a": "yes, with an opt-out", "b": "not found in the text", "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": "not found in the text", "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": "621 stars", "name": "Popularity" }, { "a": "3.5/5 (2)", "b": "none", "name": "Agent reviews" } ], "faq": [ { "answer": "Groq Speech-to-Text scores 71.8 (BB) on agent readiness against AssemblyAI Speech-to-Text (Universal)'s 66.8 (B), and leads in 3 of 7 scored categories. AssemblyAI Speech-to-Text (Universal) leads on schema \u0026 documentation, agent ergonomics and maintenance \u0026 community.", "question": "Which is better for AI agents, AssemblyAI Speech-to-Text (Universal) or Groq Speech-to-Text?" }, { "answer": "Both need an API key.", "question": "Do AssemblyAI Speech-to-Text (Universal) and Groq Speech-to-Text need an API key?" }, { "answer": "Yes. AssemblyAI Speech-to-Text (Universal) has a hosted endpoint at https://api.assemblyai.com/v2 and Groq Speech-to-Text at https://api.groq.com/openai/v1.", "question": "Can an agent call AssemblyAI Speech-to-Text (Universal) and Groq Speech-to-Text without installing anything?" } ], "goodFor": [ { "aheadOn": [ "Schema \u0026 documentation, 95 against 58", "Agent ergonomics, 80 against 75", "Maintenance \u0026 community, 80 against 68" ], "also": null, "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": [ "Reliability, 90 against 70", "Security \u0026 auth, 79 against 50", "Transparency \u0026 trust, 85 against 76" ], "also": [ "Agent-ready, a grade of BB or better", "No incidents deducted, where AssemblyAI Speech-to-Text (Universal) loses 3 points for them" ], "goodFor": "Suited to cheap, fast transcription of recorded files in many languages, and to agents that already hold a Groq key or use an OpenAI-compatible client.", "slug": "groq-speech-to-text", "watchFor": "No streaming or realtime endpoint and no diarisation in the reviewed documentation" } ], "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-groq-speech-to-text.json", "title": "Amazon Transcribe vs Groq Speech-to-Text", "url": "https://www.anchorterminal.com/compare/amazon-transcribe-vs-groq-speech-to-text" }, { "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-mistral-voxtral-transcribe.json", "title": "AssemblyAI Speech-to-Text (Universal) vs Mistral Voxtral Transcribe", "url": "https://www.anchorterminal.com/compare/assemblyai-stt-vs-mistral-voxtral-transcribe" }, { "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-groq-speech-to-text.json", "title": "Azure AI Speech speech-to-text vs Groq Speech-to-Text", "url": "https://www.anchorterminal.com/compare/azure-speech-to-text-vs-groq-speech-to-text" }, { "json": "https://www.anchorterminal.com/compare/deepgram-stt-vs-groq-speech-to-text.json", "title": "Deepgram Speech-to-Text (Nova-3, Flux) vs Groq Speech-to-Text", "url": "https://www.anchorterminal.com/compare/deepgram-stt-vs-groq-speech-to-text" }, { "json": "https://www.anchorterminal.com/compare/elevenlabs-scribe-vs-groq-speech-to-text.json", "title": "ElevenLabs Scribe Speech to Text API vs Groq Speech-to-Text", "url": "https://www.anchorterminal.com/compare/elevenlabs-scribe-vs-groq-speech-to-text" }, { "json": "https://www.anchorterminal.com/compare/gladia-stt-vs-groq-speech-to-text.json", "title": "Gladia Speech-to-Text API + MCP vs Groq Speech-to-Text", "url": "https://www.anchorterminal.com/compare/gladia-stt-vs-groq-speech-to-text" }, { "json": "https://www.anchorterminal.com/compare/google-speech-to-text-vs-groq-speech-to-text.json", "title": "Google Cloud Speech-to-Text vs Groq Speech-to-Text", "url": "https://www.anchorterminal.com/compare/google-speech-to-text-vs-groq-speech-to-text" }, { "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/groq-speech-to-text-vs-rev-ai-stt.json", "title": "Groq Speech-to-Text vs Rev AI Speech-to-Text API", "url": "https://www.anchorterminal.com/compare/groq-speech-to-text-vs-rev-ai-stt" }, { "json": "https://www.anchorterminal.com/compare/groq-speech-to-text-vs-soniox-stt.json", "title": "Groq Speech-to-Text vs Soniox Speech-to-Text", "url": "https://www.anchorterminal.com/compare/groq-speech-to-text-vs-soniox-stt" }, { "json": "https://www.anchorterminal.com/compare/groq-speech-to-text-vs-speechmatics-stt.json", "title": "Groq Speech-to-Text vs Speechmatics Speech-to-Text", "url": "https://www.anchorterminal.com/compare/groq-speech-to-text-vs-speechmatics-stt" } ], "scores": [ { "assemblyai-stt": 70, "by": 20, "edge": "groq-speech-to-text", "groq-speech-to-text": 90, "key": "reliability", "name": "Reliability", "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "assemblyai-stt": 95, "by": 37, "edge": "assemblyai-stt", "groq-speech-to-text": 58, "key": "schema", "name": "Schema \u0026 documentation", "weight": 13 }, { "assemblyai-stt": 80, "by": 5, "edge": "assemblyai-stt", "groq-speech-to-text": 75, "key": "ergonomics", "name": "Agent ergonomics", "weight": 13 }, { "assemblyai-stt": 50, "by": 29, "edge": "groq-speech-to-text", "groq-speech-to-text": 79, "key": "security", "name": "Security \u0026 auth", "weight": 14 }, { "assemblyai-stt": 40, "by": 0, "edge": "", "groq-speech-to-text": 40, "key": "payments", "name": "Payments \u0026 pricing", "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "assemblyai-stt": 80, "by": 12, "edge": "assemblyai-stt", "groq-speech-to-text": 68, "key": "maintenance", "name": "Maintenance \u0026 community", "weight": 7 }, { "assemblyai-stt": 76, "by": 9, "edge": "groq-speech-to-text", "groq-speech-to-text": 85, "key": "transparency", "name": "Transparency \u0026 trust", "weight": 7 } ], "summary": "Groq Speech-to-Text scores 71.8 (BB) on agent readiness against AssemblyAI Speech-to-Text (Universal)'s 66.8 (B), and leads in 3 of 7 scored categories. AssemblyAI Speech-to-Text (Universal) leads on schema \u0026 documentation, agent ergonomics and maintenance \u0026 community. 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.", "groq-speech-to-text": "Whisper Large v3 Turbo costs $0.04 an audio hour and Whisper Large v3 $0.111, with a no-card free plan and zero data retention as a self-serve setting. There is no streaming endpoint, no diarisation and no subtitle output, and uploads stop at 25 MB on the free plan and 100 MB on the Developer plan." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/assemblyai-stt-vs-groq-speech-to-text", "json": "https://www.anchorterminal.com/compare/assemblyai-stt-vs-groq-speech-to-text.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/assemblyai-stt-vs-groq-speech-to-text.md", "slim": "https://www.anchorterminal.com/compare/assemblyai-stt-vs-groq-speech-to-text.min.md" }, "markdown": "Groq Speech-to-Text scores 71.8 (BB) on agent readiness against AssemblyAI Speech-to-Text (Universal)'s 66.8 (B), and leads in 3 of 7 scored categories. AssemblyAI Speech-to-Text (Universal) leads on schema \u0026 documentation, agent ergonomics and maintenance \u0026 community. 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- Groq Speech-to-Text: grade BB, 71.8/100, rank #113 of 842. Markdown https://www.anchorterminal.com/tools/groq-speech-to-text.md · JSON https://www.anchorterminal.com/api/v1/tools/groq-speech-to-text.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- Schema \u0026 documentation, 95 against 58\n- Agent ergonomics, 80 against 75\n- Maintenance \u0026 community, 80 against 68\n\nWatch for: Two outages of an hour or more in the last 90 days, on 31 July and 16 September 2026\n\n### Groq Speech-to-Text (BB)\n\nGood for: Suited to cheap, fast transcription of recorded files in many languages, and to agents that already hold a Groq key or use an OpenAI-compatible client.\n\nAhead on:\n- Reliability, 90 against 70\n- Security \u0026 auth, 79 against 50\n- Transparency \u0026 trust, 85 against 76\n\nAlso in its favour:\n- Agent-ready, a grade of BB or better\n- No incidents deducted, where AssemblyAI Speech-to-Text (Universal) loses 3 points for them\n\nWatch for: No streaming or realtime endpoint and no diarisation in the reviewed documentation\n\n\n## Score by category\n\n| Category | Weight | AssemblyAI Speech-to-Text (Universal) | Groq Speech-to-Text | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 70 | 90 | Groq Speech-to-Text +20 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 95 | 58 | AssemblyAI Speech-to-Text (Universal) +37 |\n| Agent ergonomics | 13% (16.2 this run) | 80 | 75 | AssemblyAI Speech-to-Text (Universal) +5 |\n| Security \u0026 auth | 14% (17.5 this run) | 50 | 79 | Groq Speech-to-Text +29 |\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 | 68 | AssemblyAI Speech-to-Text (Universal) +12 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 76 | 85 | Groq Speech-to-Text +9 |\n| Negative events | ≤15 | -3 | 0 | |\n| **Total** | | **66.8 · B** | **71.8 · BB** | |\n\n## Facts side by side\n\n| Fact | AssemblyAI Speech-to-Text (Universal) | Groq Speech-to-Text |\n| --- | --- | --- |\n| Kind | Model API | Model API |\n| Vendor | AssemblyAI | Groq |\n| Hosted endpoint | `https://api.assemblyai.com/v2` | `https://api.groq.com/openai/v1` |\n| Transports | HTTP, Streamable HTTP | HTTP |\n| Auth | API key | API key |\n| Pricing | Pay per use | Freemium |\n| x402 | no | no |\n| Licence | MIT (SDKs) | Proprietary hosted service under the Groq Services Agreement. The SDKs are Apache-2.0 and the Whisper weights are published by OpenAI on Hugging Face |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-09-24 | 2026-08-26 |\n| Terms last updated | 2026-07-01 | 2026-06-22 |\n| Privacy policy last updated | 2026-05-26 | 2025-11-12 |\n| Customer content may train models | yes, with an opt-out | not found in the text |\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 | not found in the text |\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 | 621 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**Groq Speech-to-Text.** Whisper Large v3 Turbo costs $0.04 an audio hour and Whisper Large v3 $0.111, with a no-card free plan and zero data retention as a self-serve setting. There is no streaming endpoint, no diarisation and no subtitle output, and uploads stop at 25 MB on the free plan and 100 MB on the Developer plan.\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### Groq Speech-to-Text\n\n1. Send `whisper-large-v3-turbo` for transcription and `whisper-large-v3` for translation to English. The translations endpoint does not accept Turbo.\n2. Pass `url` instead of `file` for audio over 25 MB, and split anything over the plan's size limit into overlapping chunks before sending.\n3. Set `response_format` to `verbose_json` before asking for `timestamp_granularities[]`. Word timestamps add latency, segment timestamps do not.\n4. Every request is billed as at least 10 seconds of audio, so join very short clips where the task allows.\n5. Read `retry-after` on a 429 and back off. Audio limits count seconds an hour and a day as well as requests.\n\n## Questions\n\n### Which is better for AI agents, AssemblyAI Speech-to-Text (Universal) or Groq Speech-to-Text?\n\nGroq Speech-to-Text scores 71.8 (BB) on agent readiness against AssemblyAI Speech-to-Text (Universal)'s 66.8 (B), and leads in 3 of 7 scored categories. AssemblyAI Speech-to-Text (Universal) leads on schema \u0026 documentation, agent ergonomics and maintenance \u0026 community.\n\n### Do AssemblyAI Speech-to-Text (Universal) and Groq Speech-to-Text need an API key?\n\nBoth need an API key.\n\n### Can an agent call AssemblyAI Speech-to-Text (Universal) and Groq Speech-to-Text without installing anything?\n\nYes. AssemblyAI Speech-to-Text (Universal) has a hosted endpoint at https://api.assemblyai.com/v2 and Groq Speech-to-Text at https://api.groq.com/openai/v1.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/assemblyai-stt-vs-groq-speech-to-text.json, and with the fewest tokens: https://www.anchorterminal.com/compare/assemblyai-stt-vs-groq-speech-to-text.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"assemblyai-stt\", \"b\": \"groq-speech-to-text\"}`. From a terminal: `anchor compare assemblyai-stt groq-speech-to-text`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/assemblyai-stt.json and https://www.anchorterminal.com/api/v1/tools/groq-speech-to-text.json\n\n## Other comparisons with AssemblyAI Speech-to-Text (Universal) or Groq Speech-to-Text\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 Groq Speech-to-Text](https://www.anchorterminal.com/compare/amazon-transcribe-vs-groq-speech-to-text.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 Mistral Voxtral Transcribe](https://www.anchorterminal.com/compare/assemblyai-stt-vs-mistral-voxtral-transcribe.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 Groq Speech-to-Text](https://www.anchorterminal.com/compare/azure-speech-to-text-vs-groq-speech-to-text.md)\n- [Deepgram Speech-to-Text (Nova-3, Flux) vs Groq Speech-to-Text](https://www.anchorterminal.com/compare/deepgram-stt-vs-groq-speech-to-text.md)\n- [ElevenLabs Scribe Speech to Text API vs Groq Speech-to-Text](https://www.anchorterminal.com/compare/elevenlabs-scribe-vs-groq-speech-to-text.md)\n- [Gladia Speech-to-Text API + MCP vs Groq Speech-to-Text](https://www.anchorterminal.com/compare/gladia-stt-vs-groq-speech-to-text.md)\n- [Google Cloud Speech-to-Text vs Groq Speech-to-Text](https://www.anchorterminal.com/compare/google-speech-to-text-vs-groq-speech-to-text.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- [Groq Speech-to-Text vs Rev AI Speech-to-Text API](https://www.anchorterminal.com/compare/groq-speech-to-text-vs-rev-ai-stt.md)\n- [Groq Speech-to-Text vs Soniox Speech-to-Text](https://www.anchorterminal.com/compare/groq-speech-to-text-vs-soniox-stt.md)\n- [Groq Speech-to-Text vs Speechmatics Speech-to-Text](https://www.anchorterminal.com/compare/groq-speech-to-text-vs-speechmatics-stt.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-10-09", "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" }, "page": { "breadcrumbs": [ { "name": "Home", "url": "https://www.anchorterminal.com/" }, { "name": "Compare", "url": "https://www.anchorterminal.com/compare/" }, { "name": "AssemblyAI Speech-to-Text (Universal) vs Groq Speech-to-Text", "url": "" } ], "description": "Groq Speech-to-Text scores 71.8 (BB) on agent readiness against AssemblyAI Speech-to-Text (Universal)'s 66.8 (B), and leads in 3 of 7 scored categories. AssemblyAI Speech-to-Text (Universal) leads on schema \u0026 documentation, agent ergonomics and maintenance \u0026 community. Both do…", "facts": [ "AssemblyAI Speech-to-Text (Universal) B 66.8", "Groq Speech-to-Text BB 71.8", "scores" ], "h1": "AssemblyAI Speech-to-Text (Universal) vs Groq Speech-to-Text", "image": "https://www.anchorterminal.com/assets/og/compare-assemblyai-stt-vs-groq-speech-to-text.png", "path": "/compare/assemblyai-stt-vs-groq-speech-to-text", "published": "2026-10-01", "section": "tools", "title": "AssemblyAI Speech-to-Text (Universal) vs Groq Speech-to-Text", "toc": null, "updated": "2026-10-09", "url": "https://www.anchorterminal.com/compare/assemblyai-stt-vs-groq-speech-to-text" }, "tokens": { "markdown": 2700, "slim": 730 }, "version": 1 }