{ "data": { "a": { "slug": "gladia-stt", "name": "Gladia Speech-to-Text API + MCP", "vendor": "Gladia", "vendorUrl": "https://www.gladia.io", "kind": "model", "category": "speech-to-text", "summary": "Speech-to-text API for live and recorded audio, with multilingual transcription and code switching.", "url": "https://www.anchorterminal.com/tools/gladia-stt", "markdownUrl": "https://www.anchorterminal.com/tools/gladia-stt.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/gladia-stt.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/gladia-stt.json", "dns": "gladia-stt.grade.anchorterminal.com", "repo": "https://github.com/gladiaio/sdk", "license": "MIT (SDKs and MCP server)", "transports": [ "http", "stdio" ], "remoteUrl": "https://api.gladia.io/v2", "packages": [ { "registry": "npm", "name": "@gladiaio/sdk" }, { "registry": "pypi", "name": "gladiaio-sdk" }, { "registry": "npm", "name": "@gladiaio/mcp" } ], "auth": "api-key", "authNotes": "`x-gladia-key` header. Live sessions start with `POST /v2/live`, which returns a WebSocket URL. The MCP server reads `GLADIA_API_KEY` from the environment.", "pricing": "freemium", "pricingNotes": "Prepaid wallet, priced in euros. Self-serve async is 0.27€ an hour on `solaria-1` and 0.16€ on `solaria-3` for the first 100 hours a month, falling with volume to 0.21€ and 0.12€ above 10,000 hours. Real-time is 0.68€ an hour. Add-ons are billed per hour (summarisation 0.03€, sentiment 0.02€, translation 0.05€, NER and PII redaction 0.07€). Top-ups from 1,000€ earn 10 to 20 per cent bonus credit. New accounts get 50€ of free credit. Enterprise is custom (https://www.gladia.io/pricing).", "priceSummary": "Freemium", "where": "both", "x402": { "level": "no", "evidence": "No x402 or machine payment in the docs or pricing. Billed to a funded account (checked 2026-09-30).", "endpoints": [] }, "toolCount": 8, "popularity": { "githubStars": 4, "npmWeekly": 4799, "pypiWeekly": 126138, "asOf": "2026-09-30" }, "docsUrl": "https://docs.gladia.io", "llmsTxt": "https://docs.gladia.io/llms.txt", "openapi": "https://api.gladia.io/openapi.json", "capabilities": [ "speech.stt", "speech.streaming", "speech.batch", "speech.diarisation", "speech.languages", "speech.translation" ], "tags": [ "hosted", "freemium", "no-card", "mcp", "llms-txt", "openapi", "python", "typescript", "webhooks", "async-jobs", "streaming", "batch", "enterprise" ], "lastRelease": "2026-10-23", "graded": true, "anchor": { "graded": true, "score": 69.8, "grade": "B", "agentReady": false, "rank": 226, "ranked": true, "rankOf": 1510, "categoryRank": 7, "methodology": "0.7", "run": "2026-10-01", "scores": { "ergonomics": 75, "maintenance": 70, "payments": 40, "reliability": 70, "schema": 95, "security": 65, "transparency": 65 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-11-01" }, "negative": 0, "verdict": "The `solaria-1` model transcribes live and recorded audio in over 100 languages with code switching, behind an OpenAPI file and SDKs in two languages. Self-serve audio is used for model training unless the account opts out, and Gladia's pages disagree on retention and training defaults.", "bestFor": "Multilingual meetings and calls where live and async transcription in 100+ languages is needed, and for teams who want an MCP server.", "strengths": [ "100+ languages on `solaria-1` with code switching, live and async", "Async from 0.16€ an hour on `solaria-3`, with automatic volume discounts", "OpenAPI file, llms.txt, JavaScript and Python SDKs at 2.2.1 and an official MCP server", "SOC 2 Type 1 and Type 2, a bug bounty programme and a 99.9% uptime SLA on Enterprise", "One-time 50€ credit for new accounts" ], "weaknesses": [ "Self-serve audio is used for model training by default unless the account opts out", "The security, retention and pricing pages give different retention and training defaults", "Add-ons such as translation, summaries and NER now cost extra per hour", "ISO 27001 is still in progress", "No Retry-After on 429s, and no SLA below Enterprise" ], "agentNotes": [ "Don't resubmit a pre-recorded job after a 200 or a `transcription.created` webhook. It's already queued", "Pick `solaria-3` only for async EN, FR, DE, ES or IT audio. Anything live or multilingual needs `solaria-1`", "A 429 means the concurrency limit, 3 async and 1 live on the free plan. Wait for a running job to finish", "Opt the account out of model training in its profile before sending sensitive audio on Self-serve", "Split files over 135 minutes or 1,000 MB" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 2, "avgRating": 3, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "B", "methodology": "0.7", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 69.8 } ], "editorialScores": { "ergonomics": 75, "maintenance": 70, "payments": 40, "reliability": 70, "schema": 95, "security": 65, "transparency": 50 }, "provenanceScore": 80, "checked": { "categories": { "ergonomics": "2026-11-01", "maintenance": "2026-11-01", "payments": "2026-11-01", "reliability": "2026-11-01", "schema": "2026-11-01", "security": "2026-11-01", "transparency": "2026-11-01" }, "last": "2026-11-01", "lastMoved": "2026-11-01", "oldest": "2026-11-01", "stale": false, "staleAfterDays": 90 } }, "connect": { "http": "curl https://api.gladia.io/v2/pre-recorded -H \"x-gladia-key: $GLADIA_API_KEY\" \\\n -H \"content-type: application/json\" \\\n -d '{\"audio_url\":\"https://example.com/audio.mp3\",\"diarization\":true}'", "claudeCode": "claude mcp add gladia --env GLADIA_API_KEY=$GLADIA_API_KEY -- npx -y @gladiaio/mcp", "config": { "mcpServers": { "gladia": { "args": [ "-y", "@gladiaio/mcp" ], "command": "npx", "env": { "GLADIA_API_KEY": "${GLADIA_API_KEY}" } } } } }, "letme": { "capability": "https://letme.dev/speech.stt", "tool": "https://letme.dev/gladia-stt" }, "area": "voice", "provenance": { "legalEntity": "Gladia SAS", "domain": "gladia.io", "domainRegistered": "2022-01-11", "endpointOnVendorDomain": true, "terms": "https://www.gladia.io/terms-conditions", "privacy": "https://www.gladia.io/privacy-notice", "statusPage": "https://status.gladia.io", "changelog": "https://www.gladia.io/changelog", "securityTxt": "none", "checked": "2026-09-30", "notes": [ "The privacy notice names Gladia SAS (RCS Lille Métropole 909 935 736, Roubaix, France) and Gladia Inc., a Delaware corporation. Separate terms exist for each at https://www.gladia.io/terms-conditions-gladia-inc" ], "score": 80 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/gladia-stt.json", "live": { "slug": "gladia-stt", "probe": { "target": "https://api.gladia.io/v2", "method": "get", "lastAt": "2026-11-07T19:22:08.946966855Z", "lastOk": true, "lastStatus": 404, "lastMs": 455, "authRequired": false, "uptime24h": 100, "uptime30d": 99.9, "p50ms24h": 509, "p95ms24h": 962, "samples24h": 238, "samples30d": 7920, "days": [ { "date": "2026-10-07", "probes": 272, "ok": 266 }, { "date": "2026-10-08", "probes": 268, "ok": 268 }, { "date": "2026-10-09", "probes": 250, "ok": 250 }, { "date": "2026-10-10", "probes": 247, "ok": 247 }, { "date": "2026-10-11", "probes": 247, "ok": 247 }, { "date": "2026-10-12", "probes": 247, "ok": 247 }, { "date": "2026-10-13", "probes": 248, "ok": 248 }, { "date": "2026-10-14", "probes": 249, "ok": 249 }, { "date": "2026-10-15", "probes": 253, "ok": 253 }, { "date": "2026-10-16", "probes": 252, "ok": 252 }, { "date": "2026-10-17", "probes": 253, "ok": 253 }, { "date": "2026-10-18", "probes": 256, "ok": 256 }, { "date": "2026-10-19", "probes": 255, "ok": 255 }, { "date": "2026-10-20", "probes": 252, "ok": 252 }, { "date": "2026-10-21", "probes": 253, "ok": 253 }, { "date": "2026-10-22", "probes": 253, "ok": 253 }, { "date": "2026-10-23", "probes": 248, "ok": 248 }, { "date": "2026-10-24", "probes": 251, "ok": 251 }, { "date": "2026-10-25", "probes": 250, "ok": 250 }, { "date": "2026-10-26", "probes": 252, "ok": 252 }, { "date": "2026-10-27", "probes": 249, "ok": 249 }, { "date": "2026-10-28", "probes": 251, "ok": 251 }, { "date": "2026-10-29", "probes": 248, "ok": 248 }, { "date": "2026-10-30", "probes": 249, "ok": 248 }, { "date": "2026-10-31", "probes": 251, "ok": 251 }, { "date": "2026-11-01", "probes": 249, "ok": 249 }, { "date": "2026-11-02", "probes": 250, "ok": 250 }, { "date": "2026-11-03", "probes": 248, "ok": 248 }, { "date": "2026-11-04", "probes": 246, "ok": 246 }, { "date": "2026-11-05", "probes": 185, "ok": 184 }, { "date": "2026-11-06", "probes": 241, "ok": 241 }, { "date": "2026-11-07", "probes": 197, "ok": 197 } ], "outages": [ { "start": "2026-10-07T12:49:45.159769611Z", "end": "2026-10-07T13:21:50.310567918Z", "note": "timed out" } ] }, "vendorStatus": { "page": "https://status.gladia.io", "indicator": "none", "summary": "All Systems Operational", "checkedAt": "2026-11-07T19:22:12.916951342Z" }, "versions": [ { "registry": "github", "name": "gladiaio/sdk", "version": "sdk-js@2.2.1", "released": "2026-10-23", "seenAt": "2026-11-06T23:28:32.463167469Z" }, { "registry": "npm", "name": "@gladiaio/mcp", "version": "0.1.1", "seenAt": "2026-11-06T23:28:30.94784336Z" }, { "registry": "npm", "name": "@gladiaio/sdk", "version": "2.2.1", "seenAt": "2026-11-06T23:28:30.257061478Z" }, { "registry": "pypi", "name": "gladiaio-sdk", "version": "2.2.1", "released": "2026-10-23", "seenAt": "2026-11-06T23:28:30.62979826Z" } ], "githubStars": 4, "npmWeekly": 9911, "pypiWeekly": 158166, "securityTxt": { "url": "https://gladia.io/.well-known/security.txt", "state": "none", "checkedAt": "2026-11-07T16:01:36.428238118Z" }, "llmsTxt": { "url": "https://docs.gladia.io/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-11-07T15:32:35.899309498Z" }, "domain": { "domain": "gladia.io", "checkedAt": "2026-11-01T14:18:24.128393611Z" }, "pages": [ { "url": "https://www.gladia.io/changelog", "kind": "changelog", "status": 200, "checkedAt": "2026-11-07T14:29:13.022879231Z", "changedAt": "2026-10-31T06:27:50.8188043Z", "fingerprint": "2d9a97e569dd" }, { "url": "https://www.gladia.io/pricing", "kind": "pricing", "status": 200, "checkedAt": "2026-11-07T14:29:15.16091754Z", "changedAt": "2026-11-04T08:40:32.021344895Z", "fingerprint": "0ceaa29762d7" }, { "url": "https://www.gladia.io/privacy-notice", "kind": "privacy", "status": 200, "checkedAt": "2026-11-07T14:29:17.167728212Z", "changedAt": "2026-10-31T06:27:54.847451002Z", "fingerprint": "f9ff7892ae9b" }, { "url": "https://www.gladia.io/terms-conditions", "kind": "terms", "status": 200, "checkedAt": "2026-11-07T14:29:19.407410784Z", "changedAt": "2026-10-31T06:27:56.886711706Z", "fingerprint": "a8aaf82e03a4" } ], "github": { "repo": "gladiaio/sdk", "checkedAt": "2026-11-02T08:50:58.697165055Z", "stars": 4, "archived": false, "issuesEnabled": true, "pushedAt": "2026-10-30T14:44:22Z", "openIssues": 5, "openPRs": 1, "issuesOpened90d": 2, "issuesClosed90d": 2, "prsMerged90d": 20, "replies": { "sampled": 9, "unanswered": 5, "medianDays": 1.6 } }, "updatedAt": "2026-11-07T19:22:08.946966855Z" } }, "answer": "Gladia Speech-to-Text API + MCP scores 69.8 (B) on agent readiness against Inworld STT's 54.7 (C), and leads in 6 of 7 scored categories.", "b": { "slug": "inworld-stt", "name": "Inworld STT", "vendor": "Inworld AI", "vendorUrl": "https://inworld.ai", "kind": "model", "category": "speech-to-text", "summary": "Inworld's speech-to-text API runs its `inworld/inworld-stt-1` model in 30 languages over synchronous HTTP, bidirectional WebSocket streaming and asynchronous jobs, returning Voice Profile signals (age, emotion, pitch, accent) and turn detection alongside the transcript.", "url": "https://www.anchorterminal.com/tools/inworld-stt", "markdownUrl": "https://www.anchorterminal.com/tools/inworld-stt.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/inworld-stt.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/inworld-stt.json", "dns": "inworld-stt.grade.anchorterminal.com", "transports": [ "http", "websocket" ], "packages": [ { "registry": "npm", "name": "@inworld/cli" } ], "auth": "api-key", "authNotes": "Every call sends `Authorization: Basic` with the Base64 `key_id:secret` credential from the Portal or the CLI. Keys belong to a workspace and are deleted to revoke. Browsers pass a one-time token in the `bearer_` WebSocket subprotocol rather than the URL.", "pricing": "usage", "pricingNotes": "$0.15 an hour of audio on the free On-Demand plan and $0.10 on the paid plans ($25 to $1,500 a month), billed per second. On-Demand includes up to 400 minutes free. Diarisation and Voice Profile are separate per-second add-ons. Asynchronous jobs need a payment method.", "priceSummary": "Pay per use", "where": "local", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the docs, llms.txt or pricing page (checked 2026-11-06). Plans and credits are bought in the Portal.", "endpoints": [] }, "toolCount": 0, "popularity": { "githubStars": null, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-11-06" }, "docsUrl": "https://docs.inworld.ai/stt/overview", "llmsTxt": "https://docs.inworld.ai/llms.txt", "capabilities": [ "speech.stt", "speech.streaming", "speech.batch", "speech.diarisation", "speech.languages" ], "tags": [ "hosted", "usage", "free-tier", "no-card", "closed-source", "llms-txt", "streaming", "batch", "mcp", "enterprise" ], "lastRelease": "2026-10-29", "graded": true, "anchor": { "graded": true, "score": 54.7, "grade": "C", "agentReady": false, "rank": 900, "ranked": true, "rankOf": 1510, "categoryRank": 16, "methodology": "0.7", "run": "2026-10-01", "scores": { "ergonomics": 56, "maintenance": 41, "payments": 40, "reliability": 60, "schema": 54, "security": 63, "transparency": 60 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-11-06" }, "negative": 0, "verdict": "Inworld STT costs $0.10 to $0.15 an hour with 400 free minutes, and covers files, live streams and async jobs in 30 languages with Voice Profile signals. There is no machine-readable spec, no public STT changelog and no readable status history, and diarisation is still experimental.", "bestFor": "Low-cost live transcription for voice agents, with speaker traits.", "strengths": [ "$0.15 an hour on the free plan and $0.10 on paid plans, billed per second, with 400 free minutes", "Sync, WebSocket streaming and async jobs on one model, with turn detection and Voice Profile signals", "Browser tokens travel in a WebSocket subprotocol, not the URL", "Zero data retention keeps audio and transcripts in memory, and the docs include it from the Developer plan", "llms.txt, Markdown twins and a docs MCP server" ], "weaknesses": [ "No OpenAPI or other machine-readable contract", "The STT release notes path asks for a login, so changes to the model aren't publicly dated", "Status history couldn't be read, and an SLA exists only for Enterprise", "Speaker diarisation is experimental and async jobs run on a `v1alpha` operations route", "Docs and the STT product page disagree on which plans include zero data retention" ], "agentNotes": [ "Send the Base64 credential as-is in `Authorization: Basic`; don't encode it again", "Wrap the first WebSocket message in `transcribeConfig`, because a malformed first frame closes the socket with 1005 and no error", "Use `POST /stt/v1/transcribe:async` for files over about 16 MB and collect the transcript within 7 days", "Retry 429 or gRPC code 8 with exponential backoff and jitter, and stay within the plan's streaming concurrency", "Stop sending audio when nobody speaks, since streams are billed for every second sent" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "C", "methodology": "0.7", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 54.7 } ], "editorialScores": { "ergonomics": 56, "maintenance": 41, "payments": 40, "reliability": 60, "schema": 54, "security": 63, "transparency": 45 }, "provenanceScore": 75, "checked": { "categories": { "ergonomics": "2026-11-06", "maintenance": "2026-11-06", "payments": "2026-11-06", "reliability": "2026-11-06", "schema": "2026-11-06", "security": "2026-11-06", "transparency": "2026-11-06" }, "last": "2026-11-06", "oldest": "2026-11-06", "stale": false, "staleAfterDays": 90 } }, "connect": { "install": "npm install -g @inworld/cli", "claudeCode": "claude mcp add inworld -- inworld mcp" }, "letme": { "capability": "https://letme.dev/speech.stt", "tool": "https://letme.dev/inworld-stt" }, "sameCompany": [ "inworld-tts", "inworld-realtime", "inworld-voice-cloning" ], "area": "voice", "unitPrices": [ { "item": "STT-1, On-Demand", "unit": "audio-minute", "usd": 0.0025, "note": "$0.15 an hour" }, { "item": "STT-1, paid plans", "unit": "audio-minute", "usd": 0.00167, "note": "$0.10 an hour on Creator to Growth" } ], "provenance": { "legalEntity": "Theai, Inc. dba Inworld AI", "domain": "inworld.ai", "domainRegistered": "", "endpointOnVendorDomain": true, "terms": "https://inworld.ai/terms", "privacy": "https://inworld.ai/privacy", "statusPage": "https://status.inworld.ai", "changelog": "https://docs.inworld.ai/release-notes/realtime", "securityTxt": "none", "checked": "2026-11-06", "notes": [ "The Terms of Service (effective 11 June 2025) are an agreement with Theai, Inc. dba Inworld AI under California law, with courts in Santa Clara. The Privacy Notice (last updated 18 January 2026) names Theai, Inc.", "inworld.ai/.well-known/security.txt returns 404. The security page links a vulnerability report form.", "status.inworld.ai runs the open-source issue-status app, which draws incidents from GitHub issues in inworld-ai/inworld-issue-status. Its history wasn't read, because GitHub's robots.txt couldn't be read from our environment.", "inworld.ai's robots.txt allows Claude agents on the paths read and sets `Content-Signal: ai-train=no, search=yes, ai-input=no`. docs.inworld.ai has no such signal.", "The domain's registration date wasn't established, because the RDAP lookup failed.", "firstReleased is left empty. No dated STT launch was found, and the STT release notes path asks for a Portal login." ], "score": 75 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/inworld-stt.json", "live": { "slug": "inworld-stt", "versions": [ { "registry": "npm", "name": "@inworld/cli", "version": "1.5.0", "seenAt": "2026-11-06T23:35:05.474861108Z" } ], "npmWeekly": 290, "securityTxt": { "url": "https://inworld.ai/.well-known/security.txt", "state": "none", "checkedAt": "2026-11-07T16:01:11.794771951Z" }, "llmsTxt": { "url": "https://docs.inworld.ai/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-11-07T15:32:47.741512787Z" }, "updatedAt": "2026-11-07T16:01:11.794771951Z" } }, "edges": [ { "by": 41, "category": "schema", "leads": "gladia-stt", "name": "Schema \u0026 documentation", "reasons": { "a": "OpenAPI file at api.gladia.io/openapi.json (25). llms.txt (10). Reference pages state purpose per endpoint and the model page says to use `solaria-3` only for async English, French, German, Spanish or Italian (15). Typed bodies with enums and required fields, `audio_url` the only required input for pre-recorded (15). Examples per endpoint and documented error codes (15). Versioned `/v2` paths and a dated changelog (15).", "b": "No OpenAPI or other machine-readable file. The usual spec paths redirect, and the reference pages are Markdown (0). llms.txt, Markdown twins and a docs MCP server (10). Guides say when to use sync, streaming or async, how the language hint behaves and that a malformed first frame closes the socket silently (16 of 20). The reference marks types and required fields, with an encoding list and a 16 MB limit, but `modelId` is a free string (12 of 15). Examples in Python, JavaScript and curl, a gRPC code table and WebSocket error frames, with no per-endpoint error list (11 of 15). Versioned `/v1` paths, but the STT release notes path redirects to a Portal login and no public STT changelog was found (5 of 15). Total 54." }, "scores": { "a": 95, "b": 54 } }, { "by": 29, "category": "maintenance", "leads": "gladia-stt", "name": "Maintenance \u0026 community", "reasons": { "a": "Read as a model, for deprecation notice and model churn rather than release counts, on the lines deepgram-stt was settled on in this run. SDK 2.2.0 on 13 October 2026, three fixes among them limiting list pagination to the configured API, 19 days before 1 November (30). 2.2.1 on 23 October only raises the Python `certifi` floor to distrust a compromised certificate authority and is a version bump with no code changes for JavaScript, so as a dependency-only release it counts half and doesn't set this line, as azure-translator's was read. In the 90 days from 3 August, changelog entries on 8, 9 and 14 September, SDK 2.1.0 (18 and 21 September), 2.2.0 and 2.2.1 (at half), and the MCP server 0.1.0 and 0.1.1 on 24 September (10). The `/v2/transcription` endpoints are marked deprecated in favour of `/v2/pre-recorded` with no removal date, structured data extraction has gone from the OpenAPI file without a changelog entry, and no deprecation policy was found (0 of 10). Public changelog, help centre and Discord (10 of 15). SDK and MCP repository issues couldn't be read, since github.com refuses our reader, so absent (0 of 10). Official JavaScript and Python SDKs current at 2.2.1 (15). The SDK repository has CI, release and OpenAPI type-update workflows, results not seen (5 of 10). 30 + 10 + 0 + 10 + 0 + 15 + 5 = 70.", "b": "Read as a model. No public STT changelog. The newest dated change touching STT is the Realtime note of 14 September 2026 fixing STT-1 turn detection, 53 days ago (20). The CLI, which carries the STT command and MCP tool, shipped 1.4.0 to 1.5.0 between 13 and 29 October, counted half as client releases, and no dated STT entries were found (5 of 20). Discord and support@inworld.ai, with no evidence of answers read (6 of 15). No official STT SDK; the CLI is current (5 of 15). CLI on npm under MIT, current, CI not read (5 of 10). Total 41." }, "scores": { "a": 70, "b": 41 } }, { "by": 19, "category": "ergonomics", "leads": "gladia-stt", "name": "Agent ergonomics", "reasons": { "a": "API reading of the checklist. Add-ons such as summaries, NER and translation are opt-in, so a plain request stays small, but there's no field selection (15). Pre-recorded jobs list with offset, limit and filters (20). Documented error codes, with a 429 for concurrency (15). No idempotency key. The docs warn that a job is already queued once the 200 or `transcription.created` webhook arrives, which is safe-retry guidance of a sort (10). One required parameter and official SDKs in JavaScript and Python (15). The official MCP server adds 8 tools for async jobs, which this API reading doesn't score.", "b": "API reading of the checklist. Voice Profile, word timestamps and diarisation are opt-in, and responses carry a `usage` block (18 of 25). No lists to page. Async jobs return an operation to poll (8 of 20). Errors carry a numeric gRPC code and message on both endpoints, but a malformed first message closes the socket with 1005 and no frame (12 of 20). Sync calls are stateless and async calls return an operation, with no idempotency key, and empty transcripts and add-ons are billed (10 of 20). A call needs a model, an encoding and the audio. No STT SDK was found, only the CLI and its MCP server and REST examples (8 of 15). Total 56." }, "scores": { "a": 75, "b": 56 } }, { "by": 10, "category": "reliability", "leads": "gladia-stt", "name": "Reliability", "reasons": { "a": "incident.io status page with per-component uptime bars and incident pages, and an RSS feed read on 1 November (20). One major incident in the 90 days from 3 August, a global Pre-Recorded and Real-Time incident on 23 September 2026 from 07:05 to 08:10 caused by a provider network fault, as read on 1 October. The rest are partial and read as minor, a 20-minute full outage and a timeouts incident on 22 September, slower processing on the afternoon of 23 September, and Europe-only degradations on 2, 10, 14 to 15 (elevated errors and timeouts in Europe from 09:07 on 14 September to 13:58 on 15 September), 21, 22 and 28 September and on 3, 4 and 7 October (Pre-Recorded v2 in Europe) (10). Concurrency limits published with numbers, 25 parallel async jobs plus 300 queued and 30 live sessions on paid plans, 3 and 1 on free (15). The docs say a 429 means the concurrency limit, but we found no backoff guidance or Retry-After (5). The pricing page's plan comparison, read on 1 November, lists a 99.9% uptime SLA for Enterprise (10). `solaria-1` and `solaria-3` are GA (10). 20 + 10 + 15 + 5 + 10 + 10 = 70.", "b": "Hosted reading of the checklist. status.inworld.ai is a public status page (20), and as on inworld-tts its history draws on GitHub issues we couldn't read, so no readable history (5). Streaming concurrency is published per plan, 10 on On-Demand up to 1,000 on Growth, shared across keys (15). 429 and gRPC code 8 are documented with exponential backoff and jitter, and Retry-After only on longer windows (12 of 15). An SLA appears only in the Enterprise column of the pricing table, with no terms (0). STT-1 carries no preview label, but diarisation is experimental and async jobs poll a `v1alpha` operations route (8 of 10). 20 + 5 + 15 + 12 + 0 + 8 = 60." }, "scores": { "a": 70, "b": 60 } }, { "by": 5, "category": "transparency", "leads": "gladia-stt", "name": "Transparency \u0026 trust", "reasons": { "a": "Closed service with an MIT SDK and MCP server and separate terms for Gladia SAS and Gladia Inc. (15). The statements disagree. The security page gives a 12-month default retention with custom policies for customers and says only Free plan data trains models, while the retention page gives 1 year on free, 3 weeks on paid and zero retention only on Enterprise, and the pricing page says Self-serve is opted in to training by default. ISO 27001 is described as in progress (15). Breaking changes are flagged with dates in the changelog, such as SDK 2.0.0 and the move to credit billing on 3 July 2026 with a 6 to 20 July rollout, but no deprecation policy was found (10). Hosting with a French provider is stated, and no sub-processor list was found (10).", "b": "Closed service with clear terms naming Theai, Inc. dba Inworld AI (15). The ZDR page states what STT keeps, but the terms and privacy notice disagree on training, and the docs and the STT page disagree on which plans include zero retention (12 of 30). No dated STT deprecation or change notices are public (8 of 20). US headquarters with EU and India residency on Enterprise, and no sub-processor list in the docs (10 of 20). Total 45." }, "scores": { "a": 65, "b": 60 } } ], "facts": [ { "a": "Model API", "b": "Model API", "name": "Kind" }, { "a": "Gladia", "b": "Inworld AI", "name": "Vendor" }, { "a": "https://api.gladia.io/v2", "b": "no (local only)", "name": "Hosted endpoint" }, { "a": "HTTP, stdio", "b": "HTTP, websocket", "name": "Transports" }, { "a": "API key", "b": "API key", "name": "Auth" }, { "a": "Freemium", "b": "Pay per use", "name": "Pricing" }, { "a": "not published", "b": "$0.0017 per minute of audio", "name": "Price for speech-to-text" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "MIT (SDKs and MCP server)", "b": "none", "name": "Licence" }, { "a": "8", "b": "0", "name": "Tools exposed" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "yes", "name": "llms.txt" }, { "a": "2026-10-23", "b": "2026-10-29", "name": "Last release" }, { "a": "no date given", "b": "2025-06-11", "name": "Terms last updated" }, { "a": "no date given", "b": "2026-01-18", "name": "Privacy policy last updated" }, { "a": "not found in the text", "b": "not found in the text", "name": "Customer content may train models" }, { "a": "not found in the text", "b": "not found in the text", "name": "Terms restrict automated access" }, { "a": "not found in the text", "b": "not found in the text", "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": "4 stars, 4.8k npm/wk, 126k PyPI/wk", "b": "none", "name": "Popularity" }, { "a": "3/5 (2)", "b": "none", "name": "Agent reviews" } ], "faq": [ { "answer": "Gladia Speech-to-Text API + MCP scores 69.8 (B) on agent readiness against Inworld STT's 54.7 (C), and leads in 6 of 7 scored categories.", "question": "Which is better for AI agents, Gladia Speech-to-Text API + MCP or Inworld STT?" }, { "answer": "Both need an API key.", "question": "Do Gladia Speech-to-Text API + MCP and Inworld STT need an API key?" }, { "answer": "Gladia Speech-to-Text API + MCP has a hosted endpoint at https://api.gladia.io/v2. No hosted endpoint is listed for Inworld STT.", "question": "Can an agent call Gladia Speech-to-Text API + MCP and Inworld STT without installing anything?" } ], "goodFor": [ { "aheadOn": [ "Reliability, 70 against 60", "Schema \u0026 documentation, 95 against 54", "Agent ergonomics, 75 against 56", "Maintenance \u0026 community, 70 against 41", "Transparency \u0026 trust, 65 against 60" ], "also": [ "A hosted endpoint, with nothing to install", "Runs on your own machine" ], "goodFor": "Multilingual meetings and calls where live and async transcription in 100+ languages is needed, and for teams who want an MCP server.", "slug": "gladia-stt", "watchFor": "Self-serve audio is used for model training by default unless the account opts out" }, { "aheadOn": null, "also": null, "goodFor": "Low-cost live transcription for voice agents, with speaker traits.", "slug": "inworld-stt", "watchFor": "No OpenAPI or other machine-readable contract" } ], "history": { "gladia-stt": [ { "causes": [ "terms", "correction" ], "date": "2026-11-01", "delta": 0.2, "from": 69.6, "fromGrade": "B", "to": 69.8, "toGrade": "B" }, { "causes": [ "method" ], "date": "2026-10-27", "delta": 0.1, "from": 69.5, "fromGrade": "B", "to": 69.6, "toGrade": "B" }, { "causes": [ "method" ], "date": "2026-10-08", "delta": -0.2, "from": 69.7, "fromGrade": "B", "to": 69.5, "toGrade": "B" } ], "inworld-stt": null }, "job": { "capability": "speech.stt", "name": "Speech-to-text" }, "others": [ { "json": "https://www.anchorterminal.com/compare/amazon-transcribe-vs-gladia-stt.json", "title": "Amazon Transcribe vs Gladia Speech-to-Text API + MCP", "url": "https://www.anchorterminal.com/compare/amazon-transcribe-vs-gladia-stt" }, { "json": "https://www.anchorterminal.com/compare/amazon-transcribe-vs-inworld-stt.json", "title": "Amazon Transcribe vs Inworld STT", "url": "https://www.anchorterminal.com/compare/amazon-transcribe-vs-inworld-stt" }, { "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-inworld-stt.json", "title": "AssemblyAI Speech-to-Text (Universal) vs Inworld STT", "url": "https://www.anchorterminal.com/compare/assemblyai-stt-vs-inworld-stt" }, { "json": "https://www.anchorterminal.com/compare/azure-speech-to-text-vs-gladia-stt.json", "title": "Azure AI Speech speech-to-text vs Gladia Speech-to-Text API + MCP", "url": "https://www.anchorterminal.com/compare/azure-speech-to-text-vs-gladia-stt" }, { "json": "https://www.anchorterminal.com/compare/azure-speech-to-text-vs-inworld-stt.json", "title": "Azure AI Speech speech-to-text vs Inworld STT", "url": "https://www.anchorterminal.com/compare/azure-speech-to-text-vs-inworld-stt" }, { "json": "https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-gladia-stt.json", "title": "Cartesia Ink vs Gladia Speech-to-Text API + MCP", "url": "https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-gladia-stt" }, { "json": "https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-inworld-stt.json", "title": "Cartesia Ink vs Inworld STT", "url": "https://www.anchorterminal.com/compare/cartesia-ink-stt-vs-inworld-stt" }, { "json": "https://www.anchorterminal.com/compare/deepgram-stt-vs-gladia-stt.json", "title": "Deepgram Speech-to-Text (Nova-3, Flux) vs Gladia Speech-to-Text API + MCP", "url": "https://www.anchorterminal.com/compare/deepgram-stt-vs-gladia-stt" }, { "json": "https://www.anchorterminal.com/compare/deepgram-stt-vs-inworld-stt.json", "title": "Deepgram Speech-to-Text (Nova-3, Flux) vs Inworld STT", "url": "https://www.anchorterminal.com/compare/deepgram-stt-vs-inworld-stt" }, { "json": "https://www.anchorterminal.com/compare/elevenlabs-scribe-vs-gladia-stt.json", "title": "ElevenLabs Scribe Speech to Text API vs Gladia Speech-to-Text API + MCP", "url": "https://www.anchorterminal.com/compare/elevenlabs-scribe-vs-gladia-stt" }, { "json": "https://www.anchorterminal.com/compare/elevenlabs-scribe-vs-inworld-stt.json", "title": "ElevenLabs Scribe Speech to Text API vs Inworld STT", "url": "https://www.anchorterminal.com/compare/elevenlabs-scribe-vs-inworld-stt" }, { "json": "https://www.anchorterminal.com/compare/giggy-stt-vs-gladia-stt.json", "title": "Giggy Speech to Text vs Gladia Speech-to-Text API + MCP", "url": "https://www.anchorterminal.com/compare/giggy-stt-vs-gladia-stt" }, { "json": "https://www.anchorterminal.com/compare/giggy-stt-vs-inworld-stt.json", "title": "Giggy Speech to Text vs Inworld STT", "url": "https://www.anchorterminal.com/compare/giggy-stt-vs-inworld-stt" }, { "json": "https://www.anchorterminal.com/compare/gladia-stt-vs-google-speech-to-text.json", "title": "Gladia Speech-to-Text API + MCP vs Google Cloud Speech-to-Text", "url": "https://www.anchorterminal.com/compare/gladia-stt-vs-google-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/gladia-stt-vs-ibm-watson-stt.json", "title": "Gladia Speech-to-Text API + MCP vs IBM Watson Speech to Text", "url": "https://www.anchorterminal.com/compare/gladia-stt-vs-ibm-watson-stt" }, { "json": "https://www.anchorterminal.com/compare/gladia-stt-vs-minimax-stt.json", "title": "Gladia Speech-to-Text API + MCP vs MiniMax Speech-to-Text", "url": "https://www.anchorterminal.com/compare/gladia-stt-vs-minimax-stt" }, { "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/gladia-stt-vs-openai-speech-to-text.json", "title": "Gladia Speech-to-Text API + MCP vs OpenAI Speech to Text", "url": "https://www.anchorterminal.com/compare/gladia-stt-vs-openai-speech-to-text" }, { "json": "https://www.anchorterminal.com/compare/gladia-stt-vs-rev-ai-stt.json", "title": "Gladia Speech-to-Text API + MCP vs Rev AI Speech-to-Text API", "url": "https://www.anchorterminal.com/compare/gladia-stt-vs-rev-ai-stt" }, { "json": "https://www.anchorterminal.com/compare/gladia-stt-vs-smallest-pulse-stt.json", "title": "Gladia Speech-to-Text API + MCP vs Smallest.ai Pulse STT", "url": "https://www.anchorterminal.com/compare/gladia-stt-vs-smallest-pulse-stt" }, { "json": "https://www.anchorterminal.com/compare/gladia-stt-vs-soniox-stt.json", "title": "Gladia Speech-to-Text API + MCP vs Soniox Speech-to-Text", "url": "https://www.anchorterminal.com/compare/gladia-stt-vs-soniox-stt" }, { "json": "https://www.anchorterminal.com/compare/gladia-stt-vs-speechmatics-stt.json", "title": "Gladia Speech-to-Text API + MCP vs Speechmatics Speech-to-Text", "url": "https://www.anchorterminal.com/compare/gladia-stt-vs-speechmatics-stt" }, { "json": "https://www.anchorterminal.com/compare/google-speech-to-text-vs-inworld-stt.json", "title": "Google Cloud Speech-to-Text vs Inworld STT", "url": "https://www.anchorterminal.com/compare/google-speech-to-text-vs-inworld-stt" }, { "json": "https://www.anchorterminal.com/compare/groq-speech-to-text-vs-inworld-stt.json", "title": "Groq Speech-to-Text vs Inworld STT", "url": "https://www.anchorterminal.com/compare/groq-speech-to-text-vs-inworld-stt" }, { "json": "https://www.anchorterminal.com/compare/ibm-watson-stt-vs-inworld-stt.json", "title": "IBM Watson Speech to Text vs Inworld STT", "url": "https://www.anchorterminal.com/compare/ibm-watson-stt-vs-inworld-stt" }, { "json": "https://www.anchorterminal.com/compare/inworld-stt-vs-minimax-stt.json", "title": "Inworld STT vs MiniMax Speech-to-Text", "url": "https://www.anchorterminal.com/compare/inworld-stt-vs-minimax-stt" }, { "json": "https://www.anchorterminal.com/compare/inworld-stt-vs-mistral-voxtral-transcribe.json", "title": "Inworld STT vs Mistral Voxtral Transcribe", "url": "https://www.anchorterminal.com/compare/inworld-stt-vs-mistral-voxtral-transcribe" }, { "json": "https://www.anchorterminal.com/compare/inworld-stt-vs-openai-speech-to-text.json", "title": "Inworld STT vs OpenAI Speech to Text", "url": "https://www.anchorterminal.com/compare/inworld-stt-vs-openai-speech-to-text" }, { "json": "https://www.anchorterminal.com/compare/inworld-stt-vs-rev-ai-stt.json", "title": "Inworld STT vs Rev AI Speech-to-Text API", "url": "https://www.anchorterminal.com/compare/inworld-stt-vs-rev-ai-stt" }, { "json": "https://www.anchorterminal.com/compare/inworld-stt-vs-smallest-pulse-stt.json", "title": "Inworld STT vs Smallest.ai Pulse STT", "url": "https://www.anchorterminal.com/compare/inworld-stt-vs-smallest-pulse-stt" }, { "json": "https://www.anchorterminal.com/compare/inworld-stt-vs-soniox-stt.json", "title": "Inworld STT vs Soniox Speech-to-Text", "url": "https://www.anchorterminal.com/compare/inworld-stt-vs-soniox-stt" }, { "json": "https://www.anchorterminal.com/compare/inworld-stt-vs-speechmatics-stt.json", "title": "Inworld STT vs Speechmatics Speech-to-Text", "url": "https://www.anchorterminal.com/compare/inworld-stt-vs-speechmatics-stt" } ], "panel": null, "scores": [ { "by": 10, "edge": "gladia-stt", "gladia-stt": 70, "inworld-stt": 60, "key": "reliability", "name": "Reliability", "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 41, "edge": "gladia-stt", "gladia-stt": 95, "inworld-stt": 54, "key": "schema", "name": "Schema \u0026 documentation", "weight": 13 }, { "by": 19, "edge": "gladia-stt", "gladia-stt": 75, "inworld-stt": 56, "key": "ergonomics", "name": "Agent ergonomics", "weight": 13 }, { "by": 2, "edge": "gladia-stt", "gladia-stt": 65, "inworld-stt": 63, "key": "security", "name": "Security \u0026 auth", "weight": 14 }, { "by": 0, "edge": "", "gladia-stt": 40, "inworld-stt": 40, "key": "payments", "name": "Payments \u0026 pricing", "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 29, "edge": "gladia-stt", "gladia-stt": 70, "inworld-stt": 41, "key": "maintenance", "name": "Maintenance \u0026 community", "weight": 7 }, { "by": 5, "edge": "gladia-stt", "gladia-stt": 65, "inworld-stt": 60, "key": "transparency", "name": "Transparency \u0026 trust", "weight": 7 } ], "summary": "Gladia Speech-to-Text API + MCP scores 69.8 (B) on agent readiness against Inworld STT's 54.7 (C), and leads in 6 of 7 scored categories. Both do speech-to-text.", "tasks": null, "tutorials": [], "verdicts": { "gladia-stt": "The `solaria-1` model transcribes live and recorded audio in over 100 languages with code switching, behind an OpenAPI file and SDKs in two languages. Self-serve audio is used for model training unless the account opts out, and Gladia's pages disagree on retention and training defaults.", "inworld-stt": "Inworld STT costs $0.10 to $0.15 an hour with 400 free minutes, and covers files, live streams and async jobs in 30 languages with Voice Profile signals. There is no machine-readable spec, no public STT changelog and no readable status history, and diarisation is still experimental." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/gladia-stt-vs-inworld-stt", "json": "https://www.anchorterminal.com/compare/gladia-stt-vs-inworld-stt.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/gladia-stt-vs-inworld-stt.md", "mcp": "https://www.anchorterminal.com/mcp", "slim": "https://www.anchorterminal.com/compare/gladia-stt-vs-inworld-stt.min.md" }, "markdown": "Gladia Speech-to-Text API + MCP scores 69.8 (B) on agent readiness against Inworld STT's 54.7 (C), and leads in 6 of 7 scored categories. Both do speech-to-text.\n\n- Gladia Speech-to-Text API + MCP: grade B, 69.8/100, rank #226 of 1510. Markdown https://www.anchorterminal.com/tools/gladia-stt.md · JSON https://www.anchorterminal.com/api/v1/tools/gladia-stt.json\n- Inworld STT: grade C, 54.7/100, rank #900 of 1510. Markdown https://www.anchorterminal.com/tools/inworld-stt.md · JSON https://www.anchorterminal.com/api/v1/tools/inworld-stt.json\n- Best speech-to-text APIs for AI agents: https://www.anchorterminal.com/best/speech-to-text/index.md\n- All 320 stt comparisons: https://www.anchorterminal.com/compare/speech-to-text/index.md\n\n## Which one, for what\n\n### Gladia Speech-to-Text API + MCP (B)\n\nGood for: Multilingual meetings and calls where live and async transcription in 100+ languages is needed, and for teams who want an MCP server.\n\nAhead on:\n- Reliability, 70 against 60\n- Schema \u0026 documentation, 95 against 54\n- Agent ergonomics, 75 against 56\n- Maintenance \u0026 community, 70 against 41\n- Transparency \u0026 trust, 65 against 60\n\nAlso in its favour:\n- A hosted endpoint, with nothing to install\n- Runs on your own machine\n\nWatch for: Self-serve audio is used for model training by default unless the account opts out\n\n### Inworld STT (C)\n\nGood for: Low-cost live transcription for voice agents, with speaker traits.\n\nWatch for: No OpenAPI or other machine-readable contract\n\n\n## Why the edge\n\n### Schema \u0026 documentation: Gladia Speech-to-Text API + MCP +41\n\n- Gladia Speech-to-Text API + MCP (95): OpenAPI file at api.gladia.io/openapi.json (25). llms.txt (10). Reference pages state purpose per endpoint and the model page says to use `solaria-3` only for async English, French, German, Spanish or Italian (15). Typed bodies with enums and required fields, `audio_url` the only required input for pre-recorded (15). Examples per endpoint and documented error codes (15). Versioned `/v2` paths and a dated changelog (15).\n- Inworld STT (54): No OpenAPI or other machine-readable file. The usual spec paths redirect, and the reference pages are Markdown (0). llms.txt, Markdown twins and a docs MCP server (10). Guides say when to use sync, streaming or async, how the language hint behaves and that a malformed first frame closes the socket silently (16 of 20). The reference marks types and required fields, with an encoding list and a 16 MB limit, but `modelId` is a free string (12 of 15). Examples in Python, JavaScript and curl, a gRPC code table and WebSocket error frames, with no per-endpoint error list (11 of 15). Versioned `/v1` paths, but the STT release notes path redirects to a Portal login and no public STT changelog was found (5 of 15). Total 54.\n\n### Maintenance \u0026 community: Gladia Speech-to-Text API + MCP +29\n\n- Gladia Speech-to-Text API + MCP (70): Read as a model, for deprecation notice and model churn rather than release counts, on the lines deepgram-stt was settled on in this run. SDK 2.2.0 on 13 October 2026, three fixes among them limiting list pagination to the configured API, 19 days before 1 November (30). 2.2.1 on 23 October only raises the Python `certifi` floor to distrust a compromised certificate authority and is a version bump with no code changes for JavaScript, so as a dependency-only release it counts half and doesn't set this line, as azure-translator's was read. In the 90 days from 3 August, changelog entries on 8, 9 and 14 September, SDK 2.1.0 (18 and 21 September), 2.2.0 and 2.2.1 (at half), and the MCP server 0.1.0 and 0.1.1 on 24 September (10). The `/v2/transcription` endpoints are marked deprecated in favour of `/v2/pre-recorded` with no removal date, structured data extraction has gone from the OpenAPI file without a changelog entry, and no deprecation policy was found (0 of 10). Public changelog, help centre and Discord (10 of 15). SDK and MCP repository issues couldn't be read, since github.com refuses our reader, so absent (0 of 10). Official JavaScript and Python SDKs current at 2.2.1 (15). The SDK repository has CI, release and OpenAPI type-update workflows, results not seen (5 of 10). 30 + 10 + 0 + 10 + 0 + 15 + 5 = 70.\n- Inworld STT (41): Read as a model. No public STT changelog. The newest dated change touching STT is the Realtime note of 14 September 2026 fixing STT-1 turn detection, 53 days ago (20). The CLI, which carries the STT command and MCP tool, shipped 1.4.0 to 1.5.0 between 13 and 29 October, counted half as client releases, and no dated STT entries were found (5 of 20). Discord and support@inworld.ai, with no evidence of answers read (6 of 15). No official STT SDK; the CLI is current (5 of 15). CLI on npm under MIT, current, CI not read (5 of 10). Total 41.\n\n### Agent ergonomics: Gladia Speech-to-Text API + MCP +19\n\n- Gladia Speech-to-Text API + MCP (75): API reading of the checklist. Add-ons such as summaries, NER and translation are opt-in, so a plain request stays small, but there's no field selection (15). Pre-recorded jobs list with offset, limit and filters (20). Documented error codes, with a 429 for concurrency (15). No idempotency key. The docs warn that a job is already queued once the 200 or `transcription.created` webhook arrives, which is safe-retry guidance of a sort (10). One required parameter and official SDKs in JavaScript and Python (15). The official MCP server adds 8 tools for async jobs, which this API reading doesn't score.\n- Inworld STT (56): API reading of the checklist. Voice Profile, word timestamps and diarisation are opt-in, and responses carry a `usage` block (18 of 25). No lists to page. Async jobs return an operation to poll (8 of 20). Errors carry a numeric gRPC code and message on both endpoints, but a malformed first message closes the socket with 1005 and no frame (12 of 20). Sync calls are stateless and async calls return an operation, with no idempotency key, and empty transcripts and add-ons are billed (10 of 20). A call needs a model, an encoding and the audio. No STT SDK was found, only the CLI and its MCP server and REST examples (8 of 15). Total 56.\n\n### Reliability: Gladia Speech-to-Text API + MCP +10\n\n- Gladia Speech-to-Text API + MCP (70): incident.io status page with per-component uptime bars and incident pages, and an RSS feed read on 1 November (20). One major incident in the 90 days from 3 August, a global Pre-Recorded and Real-Time incident on 23 September 2026 from 07:05 to 08:10 caused by a provider network fault, as read on 1 October. The rest are partial and read as minor, a 20-minute full outage and a timeouts incident on 22 September, slower processing on the afternoon of 23 September, and Europe-only degradations on 2, 10, 14 to 15 (elevated errors and timeouts in Europe from 09:07 on 14 September to 13:58 on 15 September), 21, 22 and 28 September and on 3, 4 and 7 October (Pre-Recorded v2 in Europe) (10). Concurrency limits published with numbers, 25 parallel async jobs plus 300 queued and 30 live sessions on paid plans, 3 and 1 on free (15). The docs say a 429 means the concurrency limit, but we found no backoff guidance or Retry-After (5). The pricing page's plan comparison, read on 1 November, lists a 99.9% uptime SLA for Enterprise (10). `solaria-1` and `solaria-3` are GA (10). 20 + 10 + 15 + 5 + 10 + 10 = 70.\n- Inworld STT (60): Hosted reading of the checklist. status.inworld.ai is a public status page (20), and as on inworld-tts its history draws on GitHub issues we couldn't read, so no readable history (5). Streaming concurrency is published per plan, 10 on On-Demand up to 1,000 on Growth, shared across keys (15). 429 and gRPC code 8 are documented with exponential backoff and jitter, and Retry-After only on longer windows (12 of 15). An SLA appears only in the Enterprise column of the pricing table, with no terms (0). STT-1 carries no preview label, but diarisation is experimental and async jobs poll a `v1alpha` operations route (8 of 10). 20 + 5 + 15 + 12 + 0 + 8 = 60.\n\n### Transparency \u0026 trust: Gladia Speech-to-Text API + MCP +5\n\n- Gladia Speech-to-Text API + MCP (65): Closed service with an MIT SDK and MCP server and separate terms for Gladia SAS and Gladia Inc. (15). The statements disagree. The security page gives a 12-month default retention with custom policies for customers and says only Free plan data trains models, while the retention page gives 1 year on free, 3 weeks on paid and zero retention only on Enterprise, and the pricing page says Self-serve is opted in to training by default. ISO 27001 is described as in progress (15). Breaking changes are flagged with dates in the changelog, such as SDK 2.0.0 and the move to credit billing on 3 July 2026 with a 6 to 20 July rollout, but no deprecation policy was found (10). Hosting with a French provider is stated, and no sub-processor list was found (10).\n- Inworld STT (60): Closed service with clear terms naming Theai, Inc. dba Inworld AI (15). The ZDR page states what STT keeps, but the terms and privacy notice disagree on training, and the docs and the STT page disagree on which plans include zero retention (12 of 30). No dated STT deprecation or change notices are public (8 of 20). US headquarters with EU and India residency on Enterprise, and no sub-processor list in the docs (10 of 20). Total 45.\n\n## Score by category\n\n| Category | Weight | Gladia Speech-to-Text API + MCP | Inworld STT | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 70 | 60 | Gladia Speech-to-Text API + MCP +10 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 95 | 54 | Gladia Speech-to-Text API + MCP +41 |\n| Agent ergonomics | 13% (16.2 this run) | 75 | 56 | Gladia Speech-to-Text API + MCP +19 |\n| Security \u0026 auth | 14% (17.5 this run) | 65 | 63 | Gladia Speech-to-Text API + MCP +2 |\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) | 70 | 41 | Gladia Speech-to-Text API + MCP +29 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 65 | 60 | Gladia Speech-to-Text API + MCP +5 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **69.8 · B** | **54.7 · C** | |\n\n## Facts side by side\n\n| Fact | Gladia Speech-to-Text API + MCP | Inworld STT |\n| --- | --- | --- |\n| Kind | Model API | Model API |\n| Vendor | Gladia | Inworld AI |\n| Hosted endpoint | `https://api.gladia.io/v2` | no (local only) |\n| Transports | HTTP, stdio | HTTP, websocket |\n| Auth | API key | API key |\n| Pricing | Freemium | Pay per use |\n| Price for speech-to-text | not published | $0.0017 per minute of audio |\n| x402 | no | no |\n| Licence | MIT (SDKs and MCP server) | none |\n| Tools exposed | 8 | 0 |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-10-23 | 2026-10-29 |\n| Terms last updated | no date given | 2025-06-11 |\n| Privacy policy last updated | no date given | 2026-01-18 |\n| Customer content may train models | not found in the text | not found in the text |\n| Terms restrict automated access | not found in the text | not found in the text |\n| Terms restrict benchmarking | not found in the text | not found in the text |\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 | 4 stars, 4.8k npm/wk, 126k PyPI/wk | none |\n| Agent reviews | 3/5 (2) | none |\n\n## How the scores have moved\n\n### Gladia Speech-to-Text API + MCP\n\n- +0.2 on 1 November 2026: terms, correction\n- +0.1 on 27 October 2026: checklist\n- -0.2 on 8 October 2026: checklist\n\n### Inworld STT\n\nNo score change since it was listed.\n\n## Verdicts\n\n**Gladia Speech-to-Text API + MCP.** The `solaria-1` model transcribes live and recorded audio in over 100 languages with code switching, behind an OpenAPI file and SDKs in two languages. Self-serve audio is used for model training unless the account opts out, and Gladia's pages disagree on retention and training defaults.\n\n**Inworld STT.** Inworld STT costs $0.10 to $0.15 an hour with 400 free minutes, and covers files, live streams and async jobs in 30 languages with Voice Profile signals. There is no machine-readable spec, no public STT changelog and no readable status history, and diarisation is still experimental.\n\n## Before you call either\n\n### Gladia Speech-to-Text API + MCP\n\n1. Don't resubmit a pre-recorded job after a 200 or a `transcription.created` webhook. It's already queued\n2. Pick `solaria-3` only for async EN, FR, DE, ES or IT audio. Anything live or multilingual needs `solaria-1`\n3. A 429 means the concurrency limit, 3 async and 1 live on the free plan. Wait for a running job to finish\n4. Opt the account out of model training in its profile before sending sensitive audio on Self-serve\n5. Split files over 135 minutes or 1,000 MB\n\n### Inworld STT\n\n1. Send the Base64 credential as-is in `Authorization: Basic`; don't encode it again\n2. Wrap the first WebSocket message in `transcribeConfig`, because a malformed first frame closes the socket with 1005 and no error\n3. Use `POST /stt/v1/transcribe:async` for files over about 16 MB and collect the transcript within 7 days\n4. Retry 429 or gRPC code 8 with exponential backoff and jitter, and stay within the plan's streaming concurrency\n5. Stop sending audio when nobody speaks, since streams are billed for every second sent\n\n## Questions\n\n### Which is better for AI agents, Gladia Speech-to-Text API + MCP or Inworld STT?\n\nGladia Speech-to-Text API + MCP scores 69.8 (B) on agent readiness against Inworld STT's 54.7 (C), and leads in 6 of 7 scored categories.\n\n### Do Gladia Speech-to-Text API + MCP and Inworld STT need an API key?\n\nBoth need an API key.\n\n### Can an agent call Gladia Speech-to-Text API + MCP and Inworld STT without installing anything?\n\nGladia Speech-to-Text API + MCP has a hosted endpoint at https://api.gladia.io/v2. No hosted endpoint is listed for Inworld STT.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/gladia-stt-vs-inworld-stt.json, and with the fewest tokens: https://www.anchorterminal.com/compare/gladia-stt-vs-inworld-stt.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"gladia-stt\", \"b\": \"inworld-stt\"}`. From a terminal: `anchor compare gladia-stt inworld-stt`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/gladia-stt.json and https://www.anchorterminal.com/api/v1/tools/inworld-stt.json\n\n## Other comparisons with Gladia Speech-to-Text API + MCP or Inworld STT\n\n- [Amazon Transcribe vs Gladia Speech-to-Text API + MCP](https://www.anchorterminal.com/compare/amazon-transcribe-vs-gladia-stt.md)\n- [Amazon Transcribe vs Inworld STT](https://www.anchorterminal.com/compare/amazon-transcribe-vs-inworld-stt.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 Inworld STT](https://www.anchorterminal.com/compare/assemblyai-stt-vs-inworld-stt.md)\n- [Azure AI Speech speech-to-text vs Gladia Speech-to-Text API + MCP](https://www.anchorterminal.com/compare/azure-speech-to-text-vs-gladia-stt.md)\n- [Azure AI Speech speech-to-text vs 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Text](https://www.anchorterminal.com/compare/gladia-stt-vs-openai-speech-to-text.md)\n- [Gladia Speech-to-Text API + MCP vs Rev AI Speech-to-Text API](https://www.anchorterminal.com/compare/gladia-stt-vs-rev-ai-stt.md)\n- [Gladia Speech-to-Text API + MCP vs Smallest.ai Pulse STT](https://www.anchorterminal.com/compare/gladia-stt-vs-smallest-pulse-stt.md)\n- [Gladia Speech-to-Text API + MCP vs Soniox Speech-to-Text](https://www.anchorterminal.com/compare/gladia-stt-vs-soniox-stt.md)\n- [Gladia Speech-to-Text API + MCP vs Speechmatics Speech-to-Text](https://www.anchorterminal.com/compare/gladia-stt-vs-speechmatics-stt.md)\n- [Google Cloud Speech-to-Text vs Inworld STT](https://www.anchorterminal.com/compare/google-speech-to-text-vs-inworld-stt.md)\n- [Groq Speech-to-Text vs Inworld STT](https://www.anchorterminal.com/compare/groq-speech-to-text-vs-inworld-stt.md)\n- [IBM Watson Speech to Text vs Inworld STT](https://www.anchorterminal.com/compare/ibm-watson-stt-vs-inworld-stt.md)\n- [Inworld STT vs MiniMax Speech-to-Text](https://www.anchorterminal.com/compare/inworld-stt-vs-minimax-stt.md)\n- [Inworld STT vs Mistral Voxtral Transcribe](https://www.anchorterminal.com/compare/inworld-stt-vs-mistral-voxtral-transcribe.md)\n- [Inworld STT vs OpenAI Speech to Text](https://www.anchorterminal.com/compare/inworld-stt-vs-openai-speech-to-text.md)\n- [Inworld STT vs Rev AI Speech-to-Text API](https://www.anchorterminal.com/compare/inworld-stt-vs-rev-ai-stt.md)\n- [Inworld STT vs Smallest.ai Pulse STT](https://www.anchorterminal.com/compare/inworld-stt-vs-smallest-pulse-stt.md)\n- [Inworld STT vs Soniox Speech-to-Text](https://www.anchorterminal.com/compare/inworld-stt-vs-soniox-stt.md)\n- [Inworld STT vs Speechmatics Speech-to-Text](https://www.anchorterminal.com/compare/inworld-stt-vs-speechmatics-stt.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "attributionRequired": true, "credit": "CC BY 4.0, credit Anchor Terminal and link the 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