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Model infoModelsSnapshot: 15 Oct 2026

Google / Gemini

Gemini 3.5 Transcribe

Transcription model offered through the Gemini API.

availableClosed weightsTranscription
Official documentation (opens in a new tab)Reviewed 12 Oct 2026
21 of 28 specification fields collected
Audio durationUnary: up to 1 hour; 30 minutes with diarization or word timestamps. Live: 10 minutes per session.See specification notes below
Audio formatsNot collectedAwaiting source review
Input billingSee ratesGoogle Gemini API
Output billingSee ratesPublished units and conditions below

Specifications

Provider-documented facts. “Not collected” means we have not verified that field yet, not that the feature is unsupported.

Input token limit
Not collected
Maximum output
Not collected
Input modalities
AudioSource for Input modalities (opens in a new tab)

Audio (up to 1 hour)

Output modalities
Text, Word annotationsSource for Output modalities (opens in a new tab)

Text, Word annotations

Reasoning
Not supportedSource for Reasoning (opens in a new tab)

Not supported

Tool calling
Not supportedSource for Tool calling (opens in a new tab)

Not supported

Structured output
Not collected
Streaming
SupportedSource for Streaming (opens in a new tab)

Only through gemini-3.5-transcribe-live; unary requests do not stream.

Batch processing
Not supportedSource for Batch processing (opens in a new tab)

Not supported

Fine-tuning
Not collected
Knowledge cutoff
Not collected
Release date
2026-08Source for Release date (opens in a new tab)

Release month only; exact day not given.

Parameters
Not collected
Architecture
Not collected
Languages
85+ languages with automatic detection and code-switchingSource for Languages (opens in a new tab)
Audio transcription
SupportedSource for Audio transcription (opens in a new tab)

Supported

Speaker diarization
SupportedSource for Speaker diarization (opens in a new tab)

Unary endpoint only; up to 8 speakers, with 3+ experimental. Not supported on the live endpoint. Incompatible with custom vocabulary.

Word timestamps
SupportedSource for Word timestamps (opens in a new tab)

Unary endpoint only; not supported live. Incompatible with custom vocabulary and may reduce accuracy.

Custom vocabulary
Up to 1,000 terms; usually best with at most 100Source for Custom vocabulary (opens in a new tab)

Supported in both endpoints; incompatible with timestamps and diarization.

Smart transcription
SupportedSource for Smart transcription (opens in a new tab)

Supported

Context caching
Not supportedSource for Context caching (opens in a new tab)

Not supported

Code execution
Not supportedSource for Code execution (opens in a new tab)

Not supported

File search
Not supportedSource for File search (opens in a new tab)

Not supported

Image generation
Not supportedSource for Image generation (opens in a new tab)

Not supported

Flex inference
Not supportedSource for Flex inference (opens in a new tab)

Not supported

Priority inference
Not supportedSource for Priority inference (opens in a new tab)

Not supported

Model card updated
August 2026Source for Model card updated (opens in a new tab)

Card update month, not a release date.

Audio duration limits
Unary: up to 1 hour; 30 minutes with diarization or word timestamps. Live: 10 minutes per session.Source for Audio duration limits (opens in a new tab)

Access & pricing

Prices belong to an endpoint and billing tier. A provider listing does not guarantee access for every account or region.

API model ID
gemini-3.5-transcribe
Access
Google AI Studio / Gemini API account; region, tier and quota restrictions apply.
Regions
See Google supported-region and account requirements; region-specific availability not yet collected.

Prices retain their published currencies and billing units below.

Published billing units · original currency · observed 12 Oct 2026
CategoryUsageRateUnit
Audio tokensInput1$2.001M audio tokens
Text tokensOutput2$12.001M text tokens

Rate conditions

  1. Standard paid-tier input rate; per-minute equivalents in the source are illustrative.
  2. Standard paid-tier output rate; billed separately from input.
Pricing source (opens in a new tab)

Data & enterprise terms

Retention, training use, regional processing and enterprise terms have not been summarized for this endpoint.

API model ID
gemini-3.5-transcribe-live
Access
Live API transcription over WebSocket. 10-minute sessions; no speaker diarization or word timestamps; custom vocabulary supported.
Regions
See Google supported-region and account requirements; region-specific availability not yet collected.

Prices retain their published currencies and billing units below.

Published billing units · original currency · observed 12 Oct 2026
CategoryUsageRateUnit
Audio tokensInput1$3.501M audio tokens
Text tokensOutput2$21.001M text tokens

Rate conditions

  1. Standard paid-tier input rate; per-minute equivalents in the source are illustrative.
  2. Standard paid-tier output rate; billed separately from input.
Pricing source (opens in a new tab)

Data & enterprise terms

Retention, training use, regional processing and enterprise terms have not been summarized for this endpoint.

Caching

Caching can reuse earlier input processing. Availability, lifetime and billing depend on the endpoint. A cache hit still generates a new response.

01 / INITIAL INPUTProcess & retain

The system processes eligible input and retains reusable state.

02 / LATER REQUESTCheck available state

Reuse depends on matching input, session state and the cache policy.

03 / CACHE HITReuse & generate

Reusing state can reduce repeated work. Any charges follow the billing rules below.

What the measurements say

No benchmark observations have been added for this model. We do not turn a vendor description into a performance score.

Latency and throughput depend on the host, request size, reasoning settings and load. There is no measured speed or global usage figure in this record.

The record behind the model

Why it is included

Google-documented proprietary hosted release in the Gemini API model catalog. No public weights identified for this release in the reviewed documentation; public-weight Gemma models are excluded.

Classification evidence (opens in a new tab)

Sources reviewed