# March 16, 2026

## 🤖 New LLM Models Support & Bug Fixes

We've added support for new LLM models in the Voice Agent API:

- OpenAI GPT-5.3 Instant (`gpt-5.3-chat-latest`)
- OpenAI GPT 5.4 (`gpt-5.4`)
- Google Gemini 3.1 Flash Lite (`gemini-3.1-flash-lite-preview`)

**Example:**

```json
{
  "type": "Settings",
  "agent": {
    "think": {
      "provider": {
        "type": "open_ai",
        "model": "gpt-5.3-chat-latest"
      }
    }
  }
}
```

For the full list of supported models and pricing tiers, visit our [Voice Agent LLM Models documentation](/guides/self-hosted-deployments-3-voice-agent-llm-models#openai).

### Fixes

- Resolves an issue where the GPT-5.2 Instant model used an incorrect model ID and pricing tier. The model now uses the correct ID (`gpt-5.2-chat-latest`) and is assigned to the `Advanced` tier.

## Related pages

- [Amazon SageMaker](./amazon-sagemaker-index.md)
- [Aura](./aura-index.md)
- [Changelog](../changelog.md)
- [Custom Vocabulary](./custom-vocabulary-index.md)
- [Deepgram's Docs](../index.md)
- [Deployment](./deployment-index.md)
- [Docker/Podman](./docker-podman-index.md)
- [Features](./features-index.md)
- [Flux TTS](./flux-tts-index.md)
- [Formatting](./formatting-index.md)

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