Gemini 3.8 Flash TTS

Flagship expressive text-to-speech model with studio-grade voice fidelity.

Googlegemini-3.8-flash-tts2026-09-22Report incorrect data

Specs

Context: —
Max output: 16.4K
Input price: $0.5/ 1M tokens
Output price: $9/ 1M tokens
Released: 2026-09-22

Context

Context window: —
Max input: 8.2K
Max output: 16.4K

Pricing · USD / 1M tokens

Input: $0.5
Output: $9
Cache read: —
Cache write: —

Modalities

Input: Text
Output: Audio

API

API types: audiobatch

Reasoning

Reasoning: No

Info

Status: Active
Released: 2026-09-22
Knowledge cutoff: —

Features

Confirmed: batch

How to call

googlemodel = gemini-3.8-flash-tts

audio

POSThttps://generativelanguage.googleapis.com/v1beta/models/{model}:generateContent

batch

POSThttps://generativelanguage.googleapis.com/v1beta/models/{model}:batchGenerateContent

JSON

gemini-3.8-flash-tts.json

{
  "id": "gemini-3.8-flash-tts",
  "object": "model",
  "created": 1790035200,
  "owned_by": "google",
  "name": "Gemini 3.8 Flash TTS",
  "api": {
    "types": [
      "audio",
      "batch"
    ]
  },
  "limits": {
    "context": null,
    "input": 8192,
    "output": 16384
  },
  "modalities": {
    "input": [
      "text"
    ],
    "output": [
      "audio"
    ]
  },
  "reasoning": {
    "supported": false,
    "efforts": []
  },
  "pricing": {
    "currency": "USD",
    "unit": "1M_tokens",
    "input": 0.5,
    "output": 9,
    "cache_read": null,
    "cache_write": null
  },
  "features": [
    "batch"
  ],
  "info": {
    "status": "active",
    "release_date": "2026-09-22",
    "knowledge_cutoff": null,
    "description": "Flagship expressive text-to-speech model with studio-grade voice fidelity.",
    "docs": "https://ai.google.dev/gemini-api/docs/models/gemini-3.8-flash-tts",
    "verified_at": "2026-10-10"
  }
}

Official sources

Gemini 3.8 Flash TTS | Gemini APIai.google.dev2026-10-10 Models | Gemini APIai.google.dev2026-10-10 Pricing | Gemini APIai.google.dev2026-10-10 Deprecations | Gemini APIai.google.dev2026-10-10