# Gemini 3.8 Live

> Source: <https://ai.google.dev/gemini-api/docs/models/gemini-3.8-live>
> Published: 2026-09-16 01:52:01+00:00

Gemini 3.8 Live is the default option for most low-latency voice agent experiences and real-time dialogue without reasoning-induced delays. It supports interleaved reasoning, asynchronous function calling, full session client content updates, and built-in audio streaming.

## Documentation

Visit the [Live API](https://ai.google.dev/gemini-api/docs/live-api) guide for full coverage
of features and capabilities.

## gemini-3.8-live

| Property | Description | 
|---|---|
| Model code | `gemini-3.8-live` | 
| Supported data types | **Inputs** Text, images, audio, video **Output** Text and audio | 
| Token limits <sup>[\[*\]](https://ai.google.dev/gemini-api/docs/tokens)</sup> | **Input token limit** 131,072 **Output token limit** 65,536 | 
| Capabilities | Supported Not supported Not supported Not supported Supported Not supported Not supported Supported Supported Not supported Supported (interleaved reasoning) Not supported | 
| Consumption options | Not supported | 
| Versions | [model version patterns](https://ai.google.dev/gemini-api/docs/models/gemini#model-versions) for more details. | 
| Latest update | September 2026 | 
| Model card | [Model card](https://deepmind.google/models/model-cards/gemini-3-8-audio/) | 

## Migrating from Gemini 3.1 Flash Live

Gemini 3.8 Live delivers ultra-low latency audio-to-audio interactions
and expands support for asynchronous workflows. When migrating from
`gemini-3.1-flash-live-preview`, review the following updates:

- **Model string** : Update your model string from`gemini-3.1-flash-live-preview` to`gemini-3.8-live` .
- **Thinking level** :`thinking_level` is not supported for`gemini-3.8-live` .
Omit`thinking_level` (or`thinking_config` ) from your session setup.
- **Asynchronous function calling** : Async execution (`behavior: NON_BLOCKING` )
is now the default function calling mode. You can still use synchronous
blocking mode for backwards compatibility by setting`behavior: BLOCKING` on
your tool declarations. Function scheduling (`SILENT` ,`WHEN_IDLE` ,`INTERRUPTED` ) is supported.
- **Client content updates** :`send_client_content` is supported throughout the
entire session lifecycle with explicit roles (`user` or`model` ). Setting`turn_complete=true` unconditionally interrupts active model generation. If
you send content without`turn_complete` , the server waits for subsequent
messages before responding.
- **Proactive audio** : Proactive audio is now permanently enabled. Setting`proactive_audio: false` returns an error.
- **Affective dialogue** : Affective dialogue is removed from the API. Remove
any`enable_affective_dialog` configurations from your code.
- **Turn coverage** : Defaults to`TURN_INCLUDES_AUDIO_ACTIVITY_AND_ALL_VIDEO` . Video frames are sent to the
model by default, so only send frames when needed to manage context and cost.
- **Response modalities** : Audio is the supported response modality. Enable
output audio transcription if your application requires a text transcript.

For a feature comparison across all Live API models, see the
[Model comparison](https://ai.google.dev/gemini-api/docs/live-api/capabilities#model-comparison)
table.