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Google · Transcription model

Gemini 3.5 Transcribe

google/gemini-3.5-transcribe
  • Transcription
Released Sep 25, 2026

Gemini 3.5 Transcribe is a speech-to-text model from Google. It is suited for synchronous transcription that needs word-level timestamps or speaker diarization, with support for up to eight speakers. Audio...

Specifications

Input
wav, mp3, flac, m4a, ogg, webm, aac, opus · base64 JSON, multipart file or URL · up to 25 MB
Output
text; verbose_json adds language, duration, segments and word timestamps
Billing
per audio token and output token

Use it

POST /api/v1/audio/transcriptions · MCP transcribe · full reference

curl https://omnirail.org/api/v1/audio/transcriptions \
  -H "Authorization: Bearer $OMNIRAIL_KEY" \
  -F model=google/gemini-3.5-transcribe \
  -F file=@meeting.mp3