> ## AI Agent Context
> Get the complete documentation index at: https://aistudio.google.com/llms.txt
> Use this file to discover all available pages.
> For the full documentation in a single file, fetch: https://aistudio.google.com/llms-full.txt

# Gemini 3.5 Transcribe

Gemini 3.5 Transcribe is a speech-to-text model based on Gemini's audio understanding capabilities. It provides low-latency, accurate transcription with utterance-based language detection, speaker diarization, word-level timestamps, Smart transcription, and custom vocabulary speech biasing.

{% button href="https://aistudio.google.com/prompts/new_chat?model=gemini-3.5-transcribe" variant="ais" %}
  Try in Google AI Studio

{% /button %}

## Documentation  {% id="documentation" %}

Gemini 3.5 Transcribe converts speech to text from audio files. It automatically detects 85+ languages, handles multi-language code-switching, identifies individual speakers, outputs word-level timestamps, and adapts to domain-specific terms through custom vocabulary biasing.

Visit the [Audio transcription](/docs/transcribe) guide for full coverage of non-streaming features. For real-time, low-latency streaming transcription over WebSockets, visit the [Live transcription](/docs/live-api/live-transcribe) guide using `gemini-3.5-transcribe-live`. For detailed pricing, see the [Pricing page](/docs/pricing#gemini-3.5-transcribe).

## gemini-3.5-transcribe  {% id="gemini-35-transcribe" %}

{% table variant="model" %}
  * Property
  * Description

  ---

  *     {% section class="model-property" %}
  {% icon name="id_card" /%}Model code

    {% /section %}

  * `gemini-3.5-transcribe`

  ---

  *     {% section class="model-property" %}
  {% icon name="save" /%}Supported data types

    {% /section %}

  *     **Inputs** Audio (up to 1 hour)

    **Output** Text, Word annotations


  ---

  *     {% section class="model-property" %}
  {% icon name="token_auto" /%}Audio limits

    {% /section %}

  * **Unary audio limit**
    Up to 1 hour per request (up to 30 minutes when speaker diarization or word-level timestamps are enabled)

  ---

  *     {% section class="model-property" %}
  {% icon name="handyman" /%}Capabilities

    {% /section %}

  *     {% section class="three-column-grid" %}
  {% section %}
  **[Audio transcription](/docs/transcribe)**

  {% badge type="supported" /%}

  {% /section %}

  {% section %}
  **[Speaker diarization](/docs/transcribe#speaker-diarization)**

  {% badge type="supported" /%}

  {% /section %}

  {% section %}
  **[Word-level timestamps](/docs/transcribe#word-timestamps)**

  {% badge type="supported" /%}

  {% /section %}

  {% section %}
  **[Custom vocabulary](/docs/transcribe#custom-vocabulary)**

  {% badge type="supported" /%}

  {% /section %}

  {% section %}
  **[Smart transcription](/docs/transcribe#transcription-modes)**

  {% badge type="supported" /%}

  {% /section %}

  {% section %}
  **[Caching](/docs/caching)**

  {% badge type="not-supported" /%}

  {% /section %}

  {% section %}
  **[Code execution](/docs/code-execution)**

  {% badge type="not-supported" /%}

  {% /section %}

  {% section %}
  **[File search](/docs/file-search)**

  {% badge type="not-supported" /%}

  {% /section %}

  {% section %}
  **[Function calling](/docs/function-calling)**

  {% badge type="not-supported" /%}

  {% /section %}

  {% section %}
  **[Image generation](/docs/image-generation)**

  {% badge type="not-supported" /%}

  {% /section %}

  {% section %}
  **[Thinking](/docs/thinking)**

  {% badge type="not-supported" /%}

  {% /section %}

    {% /section %}


  ---

  *     {% section class="model-property" %}
  {% icon name="speed" /%}Consumption options

    {% /section %}

  *     {% section class="three-column-grid" %}
  {% section %}
  **[Batch API](/docs/batch-api)**

  {% badge type="not-supported" /%}

  {% /section %}

  {% section %}
  **[Flex inference](/docs/flex-inference)**

  {% badge type="not-supported" /%}

  {% /section %}

  {% section %}
  **[Priority inference](/docs/priority-inference)**

  {% badge type="not-supported" /%}

  {% /section %}

    {% /section %}


  ---

  *     {% section class="model-property" %}
  {% icon name="123" /%}Versions

    {% /section %}

  *     Read the [model version patterns](/docs/models#model-versions) for more details.

    *   `gemini-3.5-transcribe` (Unary)
    *   `gemini-3.5-transcribe-live` (Live API)


  ---

  *     {% section class="model-property" %}
  {% icon name="calendar_month" /%}Latest update

    {% /section %}

  * August 2026

  ---

  *     {% section class="model-property" %}
  {% icon name="paid" /%}Pricing

    {% /section %}

  * [Gemini 3.5 Transcribe](/docs/pricing#gemini-3.5-transcribe)   
    [Gemini 3.5 Transcribe Live](/docs/pricing#gemini-3.5-transcribe-live)
{% /table %}

## Feature support and limitations  {% id="feature-support-and-limitations" %}

Gemini 3.5 Transcribe supports the following features across its two endpoints:

| Feature | Live Streaming (`gemini-3.5-transcribe-live`) | Audio File Processing (`gemini-3.5-transcribe`) | Notes / Limitations |
| :--- | :--- | :--- | :--- |
| **Language Auto-detection** | Supported (85+ languages) | Supported (85+ languages) | Includes mid-session code-mixing. |
| **Word-level Timestamps** | Not Supported | Supported | Degrades transcription accuracy. Incompatible with custom vocabulary. |
| **Custom Vocabulary Biasing** | Supported (up to 1,000 terms) | Supported (up to 1,000 terms) | Customers typically see best results with up to 100 terms. Incompatible with diarization and timestamps. |
| **Smart Dictation & Formatting** | Supported | Supported | Includes filler word removal and intent-aware alphanumeric formatting. |
| **Speaker Diarization** | Not Supported | Supported (up to 8 speakers) | Attribution for 3+ speakers is experimental. Incompatible with custom vocabulary. |
| **Max Audio Duration** | 10 minutes per session. | Up to 1 hour | File processing is limited to 30 minutes when features like diarization or timestamps are enabled. |

## Supported languages  {% id="supported-languages" %}

The following languages and BCP-47 language codes are supported for Gemini 3.5 Transcribe:

| Language | BCP-47 Code | Language | BCP-47 Code |
| :--- | :--- | :--- | :--- |
| Afrikaans | `af-ZA` | Japanese | `ja-JP` |
| Amharic | `am-ET` | Javanese | `jv-ID` |
| Arabic (Egypt) | `ar-EG` | Kabuverdianu | `kea-CV` |
| Armenian | `hy-AM` | Kannada | `kn-IN` |
| Assamese | `as-IN` | Kazakh | `kk-KZ` |
| Azerbaijani | `az-AZ` | Korean | `ko-KR` |
| Belarusian | `be-BY` | Kyrgyz | `ky-KG` |
| Bengali (Bangladesh) | `bn-BD` | Latvian | `lv-LV` |
| Bengali (India) | `bn-IN` | Lingala | `ln-CD` |
| Bosnian | `bs-BA` | Lithuanian | `lt-LT` |
| Bulgarian | `bg-BG` | Macedonian | `mk-MK` |
| Bulgarian (Aromanian) | `rup-BG` | Malay | `ms-MY` |
| Burmese | `my-MM` | Malayalam | `ml-IN` |
| Cantonese (Traditional) | `yue-Hant-HK` | Maltese | `mt-MT` |
| Catalan | `ca-ES` | Mandarin Chinese (Simplified) | `cmn-Hans-CN` |
| Cebuano | `ceb` | Marathi | `mr-IN` |
| Central Khmer | `km-KH` | Mongolian | `mn-MN` |
| Croatian | `hr-HR` | Nepali | `ne-NP` |
| Czech | `cs-CZ` | Norwegian | `nb-NO` |
| Danish | `da-DK` | Oriya | `or-IN` |
| Dutch | `nl-NL` | Polish | `pl-PL` |
| English (Great Britain) | `en-GB` | Portuguese (Brazil) | `pt-BR` |
| English (India) | `en-IN` | Portuguese (Portugal) | `pt-PT` |
| English (United States) | `en-US` | Punjabi | `pa-IN` |
| Estonian | `et-EE` | Punjabi (Gurmukhi script) | `pa-Guru-IN` |
| Farsi | `fa-IR` | Romanian | `ro-RO` |
| Filipino | `fil-PH` | Russian | `ru-RU` |
| Finnish | `fi-FI` | Serbian | `sr-RS` |
| French | `fr-FR` | Sindhi (Arabic script) | `sd-Arab-IN` |
| Galician | `gl-ES` | Slovak | `sk-SK` |
| Georgian | `ka-GE` | Slovenian | `sl-SI` |
| German | `de-DE` | Spanish (Latin America) | `es-419` |
| Greek | `el-GR` | Spanish (United States) | `es-US` |
| Gujarati | `gu-IN` | Swahili (Kenya) | `sw-KE` |
| Hausa | `ha-NG` | Swedish | `sv-SE` |
| Hebrew | `he-IL` | Tajik | `tg-TJ` |
| Hindi | `hi-IN` | Telugu | `te-IN` |
| Hungarian | `hu-HU` | Thai | `th-TH` |
| Icelandic | `is-IS` | Turkish | `tr-TR` |
| Indian English | `en-IN` | Ukrainian | `uk-UA` |
| Indonesian | `id-ID` | Uzbek | `uz-UZ` |
| Italian | `it-IT` | Vietnamese | `vi-VN` |