# GPT-5.4-mini Now Available for Telnyx Voice AI Assistants

> Source: <https://telnyx.com/release-notes/gpt-5-4-mini-voice-ai-assistants>
> Published: 2026-07-23 00:00:00+00:00

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GPT-5.4-mini is now available as an LLM model option for Telnyx Voice AI Assistants. Select OpenAI's compact, high-efficiency model directly in your assistant configuration, with no external API setup required for Telnyx-hosted inference.

For API-based configuration, set the model field on your assistant:

```
{
  "model": "openai/gpt-5.4-mini"
}
```

**Learn more** in the [Telnyx AI Assistants docs](https://developers.telnyx.com/docs/inference/ai-assistants) or the [Available Models guide](https://developers.telnyx.com/docs/inference/models).