Gemini 3.1 Flash TTS Preview

gemini-3.1-flash-tts-preview

CHAT High tier Reasoning Proprietary (API-only)

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.

8.2KContext

16.4KMax output

$1$ / 1M in

Pricing

Input: $1 / 1M tokens
Output: $20 / 1M tokens
Currency: USD
Note: Indicative US list price — verify with the vendor.

Indicative US list price — a reference only, verify with the vendor. Source: litellm. Last verified 2026-09-26.

Specifications

Context window: 8,192 tokens (8.2K)
Max output: 16,384 tokens
Weights: Proprietary (API-only)
Input modalities: text
Output modalities: audio
Knowledge cutoff: 2025-01
Release date: 2026-04-15

Capabilities

reasoning

Provenance

gemini-apilitellmmodels-dev

Last verified: 2026-10-30

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