fish-audio
Fish Audio: S2.1 Pro
fish-audio/s2.1-pro
Our take
AI-assisted analysis based on the sources below. Suitability is an editorial assessment; test it on your own workload.
OpenRouter’s catalog describes fish-audio/s2.1-pro as a production-oriented text-to-speech model from Fish Audio, with text input and speech output. The listing says it is intended for multilingual voice applications, expressive narration, and dialogue synthesis, and reports natural-language controls for speaking style. It also includes one audio-realism arena measurement, but the evidence pack contains no independent model card, detailed methodology, or broader evaluation. Claims should therefore be treated as catalog-reported until validated on the intended workload.[1]
Strengths
- The catalog positions the model for multilingual voice applications, expressive narration, and dialogue synthesis.[1]
- It reports open-ended natural-language controls for speaking style.[1]
- The OpenRouter entry includes an audio-realism arena measurement, providing limited measured preference evidence beyond descriptive claims.[1]
Limitations
- Only the OpenRouter catalog was supplied; an independent model card was not available in this source pack.[1]
- The supplied evidence does not document language coverage, voice options, latency, licensing, deployment requirements, safety behavior, or real-world audio quality.[1]
- The single arena result lacks enough context here to establish performance across accents, languages, domains, or production loads.[1]
Where to use it
- Consider a controlled pilot for multilingual voice applications where generated speech is reviewed before release.[1]
- Consider testing expressive narration or character dialogue, with human checks for pronunciation, emotional fit, and consistency.[1]
- Consider prototyping style-guided speech generation if natural-language control is a workflow requirement.[1]
Sources
- [1] OpenRouter catalog · Fish Audio: S2.1 ProSources checked: Nov 13, 2026
About this model
Description below is the original text supplied by OpenRouter, shown in the source language.
S2.1 Pro is a production-oriented text-to-speech model from Fish Audio. It is suited for multilingual voice applications, expressive narration, and dialogue synthesis, with open-ended natural-language controls for speaking style and...
Specifications
- Model ID
- fish-audio/s2.1-pro
- Canonical ID
- fish-audio/s2.1-pro-20260729
- Creator
- fish-audio
- Added to OpenRouter
- 29.07.2026
- Context length
- 0
- Modality
- text->speech
- Input modalities
- text
- Output modalities
- speech
- Token pricing
- No per-token price in the source snapshot — see OpenRouter for the billing unit
- Knowledge cutoff
- —
- Expiration date
- —
Tasks and capabilities
A grade appears only where the source supplies a matching measurement for that task, the model is active and the cohort holds at least 10 comparable models. The capability column lists facts the source declares — supported formats, reasoning and tool parameters — which are not measured quality.
| Task | Grade | Source-declared capability |
|---|---|---|
| General quality | No measurement | — |
| Coding | No measurement | — |
| Agents | No measurement | — |
| Writing | No measurement | — |
| Reasoning | No measurement | — |
| Document analysis | No measurement | — |
| Vision | No measurement | — |
| Image generation | No measurement | — |
| Audio | No measurement | — |
| Video | No measurement | — |
| Embeddings | No measurement | — |
Evaluations
| Source | Benchmark | Value | Grade | Data retrieved |
|---|---|---|---|---|
| Design Arena | models · audiorealismwin rate 33.2% · rank 5 | 953Elo | —Not rated | 13.11.2026 |
How grades work
Each letter grade compares a model only against other models scored by the same source and metric in the current snapshot. S means the top 10%, A the next 20%, B the next 30%, C the rest. Models without a published measurement are shown as not rated — a supported format alone never implies measured quality.
- S — S — top 10% of the cohort
- A — A — next 20% of the cohort
- B — B — next 30% of the cohort
- C — C — below the B band
Providers
Optional live provider statistics from OpenRouter. Missing values are unknown, not zero.
| Provider | Context length | Price in /1M | Price out /1M | Latency p50 (30m, s) | Throughput p50 (30m, tok/s) | Uptime (30m) |
|---|---|---|---|---|---|---|
| Fish Audio | 0 | — | — | — | — | 100% |
Provider data retrieved: 13.11.2026
Related articles
No published articles identify this model yet.