Gemini 3.1 Flash TTS Preview vs Gemini 3.8 Flash TTS
AA TTS provider voice AA TTS provider voice (version unstated): People listen to two voices reading the same text and pick the more natural one
Gemini 3.1 Flash TTS Preview—
Gemini 3.8 Flash TTS1,279
| Benchmark | Gemini 3.1 Flash TTS Preview | Gemini 3.8 Flash TTS |
|---|---|---|
| AA TTS provider voice | — | 1,279 |
Specs
| Spec | Gemini 3.1 Flash TTS Preview | Gemini 3.8 Flash TTS |
|---|---|---|
| Weights | Closed | Closed |
| Released | Feb 2026 | Sep 2026 |
| Languages | — | en, es, fr +123 |
| Voice cloning | — | Yes |
| Price covers | — | Exact native tariff; see source for billing scope. |
What breaks when you switch
Gemini 3.1 Flash TTS Preview → Gemini 3.8 Flash TTS
Nothing known.
Gemini 3.8 Flash TTS → Gemini 3.1 Flash TTS Preview