# Gemini 3.1 Flash TTS Preview

`gemini-3.1-flash-tts-preview` — **gemini** · CHAT

> Gemini 3.1 Flash TTS Preview (gemini-3.1-flash-tts-preview) is a chat model from gemini with a 8.2K-token context window; proprietary (API-only); capabilities reasoning; input text; output audio.

| Field | Value |
| --- | --- |
| Vendor | gemini |
| Kind | CHAT |
| Context window | 8,192 tokens |
| Max output tokens | 16,384 tokens |
| Indicative price (US list) | $1 in / $20 out per 1M tokens (indicative US list — verify with vendor) |
| Input modalities | text |
| Output modalities | audio |
| Capabilities | reasoning |
| Weights | Proprietary (API-only) |
| Knowledge cutoff | 2025-01 |
| Release date | 2026-04-15 |
| Sources | gemini-api, litellm, models-dev |
| Last verified | 2026-11-05 |

*Part of the [Model Catalog](https://models.viglet.org/) — [gemini models](https://models.viglet.org/models/gemini/) · [Vendor JSON](https://models.viglet.org/by-vendor/gemini.json) · [HTML](https://models.viglet.org/models/gemini/gemini-3.1-flash-tts-preview.html)*