Fish Audio S2 Pro
Audio Available fish-audio/s2-pro · by Fish Audio · neural-tts
Pricing — 1 offering(s)
Text characters
- $15.00 / 1M characters Current 2026-07-30 → present
Showing the active price and any recorded history. Full pricing history is available via the paid API — see API docs.
Capability profile
voice naturalness strong
language support strong
voice variety strong
streaming latency strong
cloning support strong
Benchmarks
| Benchmark | Score | Config | Source |
|---|---|---|---|
| Time-to-first-audio guarantee (vendor SLA) | 100 ms | Fish Audio's own contractual production-tier guarantee, not an independently measured latency benchmark. | source ↗ |
Operator guidance
Fish Audio's own docs label S2 Pro "Previous S2 Model" and recommend S2.1 Pro for new production integrations — same $15/1M-byte price, with improved quality, latency, throughput, and broader language coverage (83 vs 80+ languages). S2 Pro remains fully supported and priced, not deprecated, so existing integrations don't need to migrate urgently.
Use cases
- Production TTS with multi-speaker dialogue and open-ended emotion tagging
- Latency-sensitive applications relying on the 100ms TTFA guarantee
- Existing integrations on S2 Pro not yet migrated to S2.1 Pro
Limitations
- Fish Audio recommends S2.1 Pro over S2 Pro for new production integrations
- 100ms TTFA figure is a vendor SLA commitment, not an independently measured benchmark
- Fish Audio's native billing unit is UTF-8 bytes, not characters — see registry pricing notes
Citations
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