Fish AudioGoogleAudio matchupSpeech output
Fish Audio S2.1 Provs.Gemini 3.8 Flash TTS
Which model is better?
Gemini 3.8 Flash TTS does better in independent tests.
Pick Fish Audio S2.1 Pro for
Pick Gemini 3.8 Flash TTS for
Shared tests
Independent evaluators and leaderboards only, the newest shared snapshot per evaluator. With 95 % ranges a lead counts when they do not overlap; for hit rates, when it holds in a 95 % test. Without any uncertainty figure at most “slightly ahead”.
Artificial Analysis
Gemini 3.8 Flash TTS aheadGemini 3.8 Flash TTS is clearly ahead in 2 of 2 subtests, Fish Audio S2.1 Pro in none.
Artificial Analysis Provider Voice Arena preference
95 % ranges 1,170 to 1,196 and 1,269 to 1,295, as of November 3, 2026
Artificial Analysis Controlled Voice Arena Elo
95 % ranges 996 to 1,022 and 1,039 to 1,063, as of November 3, 2026
Source · latest November 3, 2026
VoiceArena
Gemini 3.8 Flash TTS aheadGemini 3.8 Flash TTS is clearly ahead in 1 of 2 subtests and slightly in 1, Fish Audio S2.1 Pro in none.
VoiceArena TTS Elo: US English
95 % ranges 975 to 1,003 and 1,047 to 1,071, as of October 28, 2026
VoiceArena TTS v1, US English, All, Elo
as of October 17, 2026
Source · latest October 28, 2026
DesignArena
Gemini 3.8 Flash TTS slightly aheadDesignArena Audio Realism Elo
as of October 28, 2026
Source · latest October 28, 2026
All data side by side
Prices are verbatim from the provider, because audio models bill per minute, character or token.
| Fish Audio S2.1 Pro | Gemini 3.8 Flash TTS | |
|---|---|---|
| Task | Speech output | Speech output |
| Developer | Fish Audio | |
| Status | Active | Active |
| Released | June 23, 2026 | September 22, 2026 |
| Weights | proprietary | n/a |
| Runs locally | no | no |
| Price | Free through 2026-11-30 under fair-use rules; changes with advance notice | $0.50 per 1M text tokens through December 31, 2026, then $1 per 1M text tokens from January 1, 2027 |
| Popularity (out of 100) | 0 | 0 |