Fish Audio · read on October 27, 2026
Fish Audio S2.1 Pro
Fish Audio S2.1 Pro is a TTS (text-to-speech) model from Fish Audio. Coval measures its P95 time to first audio at 533 ms, which puts it in the Visible delay speed tier. It ranks 25 of 86 in the full ranking.
- Speed tier
- Visible delay
- P95 / median
- 533 ms / 328.1 ms
- Listener Elo
- 1,184
- Price per 1M chars
- $15
Where it ranks
Full ranking: 25 of 86. Use case ranks, by speed:
The tier and the ranks are computed by this site from the benchmarks' figures, not declared by Fish Audio.
Measurements and sources
Coval
| Median time to first audio (P50) | 328.1 ms |
| Time to first audio, P95 | 533 ms |
| Time to first audio, mean | 355.7 ms |
| Time to first audio, P90 | 445.6 ms |
| Timed requests | 2,806 |
Speko
| Latency, board chart | 198 ms |
Artificial Analysis
| Listener Elo | 1,184 |
| Listener Elo, 95% interval | 13 |
| Listener Elo, customer service | 1,213 |
| Hard passages pronounced correctly | 88.1% |
Cekura
| Time to first audio, streamed text | 321 ms |
| Time to first audio, text sent whole | 333 ms |
| Reading accuracy | 92% |
| Estimated naturalness (1 to 5) | 4.4 |
Details
| Provider | Fish Audio |
| Access | Proprietary |
| Streaming | A benchmark measures its time to first audio |
| Features listed by Coval | emotion-control, multilingual, voice-cloning |
| Languages tested | German, Chinese |
| Measured by | Artificial Analysis, Cekura, Coval, Speko |
| Official site | fish.audio |
Not collected
Nothing below is estimated. Each line says which measure is missing and why.
- Naturalness (Speko naturalness): listed by Speko without this value (reading of 2026-10-27)
- Numbers and dates (Speko pronunciation score): listed by Speko without this value (reading of 2026-10-27)
Sources
- https://artificialanalysis.ai/text-to-speech (read on October 27, 2026)
- https://artificialanalysis.ai/text-to-speech/leaderboard/provider-voice (read on October 27, 2026)
- https://benchmarks.cekura.ai/text-to-speech (read on October 27, 2026)
- https://benchmarks-api-6wxgp27p2a-ue.a.run.app/v1/results/aggregates?benchmark=TTS&window=30d&include_series=false (read on October 27, 2026)
- https://benchmarks.speko.ai/tts/ (read on October 27, 2026)
Values are copied from these pages on the date shown. The match between this model and its benchmark entries is inferred, because a source writes the name differently: Artificial Analysis (pronunciation): “Fish Audio S2.1 Pro (Oct 2026)”; Artificial Analysis: “Fish Audio S2.1 Pro (Oct 2026)”. See the methodology.
Compare it with the reference model: Gradium TTS vs Fish Audio S2.1 Pro.