Google · Audio line

Gemini Flash TTS

2 stages over 11 months, from Gemini 2.5 Flash Preview TTS in May 2025 to Gemini 3.1 Flash TTS Preview in Apr 2026.

Evolution chamber01 / 02

Google

Gemini 2.5 Flash Preview TTS

CTX8K

Preview

Text to speech

Input$0.50/M

Output$10/M

Speech generation model for controllable voice, narration, and audio delivery

PaidProprietary563/1044

Ready to evolve

Every generation. A new possibility.

Gemini 2.5 Flash Preview TTS · May 2025

2 stages, from Gemini 2.5 Flash Preview TTS (May 2025) to Gemini 3.1 Flash TTS Preview (Apr 2026). Press Evolve to watch each step.

Context window

Max output

Output priceper 1M tokens, lower is better

v2.5 Stage 1
Google
Gemini 2.5 Flash Preview TTS
CTX8K
Preview
Text to speech
TextInput$0.50/M
AudioOutput$10/M
Speech generation model for controllable voice, narration, and audio delivery
PaidProprietary563/1044
v3.1 Stage 2
Google
Gemini 3.1 Flash TTS Preview
CTX8K
Preview
Text to speech
TextInput$1/M
AudioOutput$20/M
Low-latency speech generation with steerable prompts and expressive audio tags
PaidProprietary866/1044