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Head to head · Speech stt · October 2026 research run

Gladia Speech-to-Text API + MCP vs Mistral Voxtral Transcribe

Gladia Speech-to-Text API + MCP scores 69.5 (B) on agent readiness against Mistral Voxtral Transcribe's 64.1 (B), and leads in 3 of 7 scored categories. Mistral Voxtral Transcribe leads on transparency & trust. Both do speech stt.

Gladia Speech-to-Text API + MCPGladia · Model API B69.5/100#171 of 841 Mistral Voxtral TranscribeMistral AI · Model API B64.1/100#329 of 841

Which one, for what

Gladia Speech-to-Text API + MCP B

Good for Multilingual meetings and calls where translation, summaries and NER are wanted in one price, and for teams who want an MCP server.

Ahead on

  • Reliability, 60 against 53
  • Schema & documentation, 95 against 85
  • Maintenance & community, 80 against 66

Also in its favour

  • Runs on your own machine
  • Free to start without a card
  • No incidents deducted, where Mistral Voxtral Transcribe loses 3 points for them

Watch for

Starter costs $0.61 an hour async and $0.75 real time, several times the cheapest rivals

Mistral Voxtral Transcribe B

Good for Suited to low-cost batch transcription with diarisation in the 13 supported languages, and to live captions or voice agents that can run without speaker labels.

Ahead on

  • Transparency & trust, 82 against 64

Watch for

Audio rate limits are named (audio seconds a minute and a month) but the numbers are shown only in the Admin Panel

Score by category

CategoryWeight this runGladia Speech-to-Text API + MCPMistral Voxtral TranscribeEdge
Reliability16%206053Gladia Speech-to-Text API + MCP +7
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.29585Gladia Speech-to-Text API + MCP +10
Agent ergonomics13%16.27577Mistral Voxtral Transcribe +2
Security & auth14%17.57070even
Payments & pricing10%12.54040even
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88066Gladia Speech-to-Text API + MCP +14
Transparency & trust7%8.86482Mistral Voxtral Transcribe +18
Negative events≤150-3
Total69.5 · B64.1 · B

Facts side by side

FactGladia Speech-to-Text API + MCPMistral Voxtral Transcribe
KindModel APIModel API
VendorGladiaMistral AI
Hosted endpointhttps://api.gladia.io/v2https://api.mistral.ai/v1
TransportsHTTP, stdioHTTP, websocket
AuthAPI keyAPI key
PricingFreemiumFreemium
x402nono
LicenceMIT (SDKs and MCP server)Proprietary hosted service under Mistral's commercial terms. Voxtral Mini 4B Realtime weights and the SDKs are Apache-2.0
Tools exposed8none
Read-only variant documentednono
llms.txtyesyes
Last release2026-09-242026-02-04
Terms last updatedno date given2026-09-25
Privacy policy last updatedno date given2026-09-03
Customer content may train modelsnot found in the textyes, with an opt-out
Terms restrict automated accessnot found in the textnot found in the text
Terms restrict benchmarkingnot found in the textyes
Terms or service can change without noticenot found in the textyes
Arbitration or class-action waivernot found in the textnot found in the text
Popularity4 stars, 4.8k npm/wk, 126k PyPI/wk773 stars
Agent reviews3/5 (2)none

Verdicts

Gladia Speech-to-Text API + MCP

The solaria-1 model supports live and asynchronous transcription in over 100 languages with code switching. Starter pricing is $0.61 an hour for asynchronous transcription and $0.75 for real-time audio.

Mistral Voxtral Transcribe

Batch transcription costs $0.003 a minute and takes one multipart call with a file, a URL or an uploaded file ID. Rate limit numbers are shown only in the console, and timestamps cannot be combined with a set language, nor diarisation with the realtime model.

Before you call either

Gladia Speech-to-Text API + MCP

  1. Don't resubmit a pre-recorded job after a 200 or a transcription.created webhook. It's already queued
  2. Pick solaria-3 only for async EN, FR, DE, ES or IT audio. Anything live or multilingual needs solaria-1
  3. A 429 means the concurrency limit, 3 async and 1 live on the free plan. Wait for a running job to finish
  4. Upgrade off the free plan before sending sensitive audio
  5. Split files over 135 minutes or 1,000 MB

Mistral Voxtral Transcribe

  1. Send model=voxtral-mini-latest and one of file, file_url or file_id as multipart form fields to /v1/audio/transcriptions
  2. Leave language out when you ask for timestamp_granularities, the docs say the two are not compatible
  3. Use the batch endpoint for diarisation. voxtral-mini-transcribe-realtime-2602 does not accept diarize
  4. Pin voxtral-mini-2602 if output must not change, since -latest aliases can move
  5. Mint browser tokens with POST /v1/client/sessions close to connection time and pass them in Sec-WebSocket-Protocol, never the API key

Questions

Which is better for AI agents, Gladia Speech-to-Text API + MCP or Mistral Voxtral Transcribe?

Gladia Speech-to-Text API + MCP scores 69.5 (B) on agent readiness against Mistral Voxtral Transcribe's 64.1 (B), and leads in 3 of 7 scored categories. Mistral Voxtral Transcribe leads on transparency & trust.

Do Gladia Speech-to-Text API + MCP and Mistral Voxtral Transcribe need an API key?

Both need an API key.

Can an agent call Gladia Speech-to-Text API + MCP and Mistral Voxtral Transcribe without installing anything?

Yes. Gladia Speech-to-Text API + MCP has a hosted endpoint at https://api.gladia.io/v2 and Mistral Voxtral Transcribe at https://api.mistral.ai/v1.

Other comparisons with Gladia Speech-to-Text API + MCP or Mistral Voxtral Transcribe

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