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Fish Audio S2 Pro

Audio Available Full comparison ↗

fish-audio/s2-pro · by Fish Audio · neural-tts

Pricing — 1 offering(s)

Fish Audio

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  • $15.00 / 1M characters Current 2026-07-30 → present
    Fish Audio's native billing unit is UTF-8 BYTES, not characters — the pricing page states "$15.00 / M UTF-8…

    Fish Audio's native billing unit is UTF-8 BYTES, not characters — the pricing page states "$15.00 / M UTF-8 bytes", identical to S1 and S2.1-Pro. For English/Latin-script text 1 character = 1 byte; for CJK and other multi-byte scripts actual cost per character can run up to 3-4x this rate. Recorded as per_1m_characters (closest schema unit) since the registry has no byte-based unit; effective_from is the date this entry was sourced, not a confirmed price-change date.

Showing the active price and any recorded history. Full pricing history is available via the paid API — see API docs.

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Capability profile

How Fish Audio S2 Pro rates across core capability dimensions, with the task-level evidence behind each rating.

voice naturalness Strong

Natural-language [bracket]-tag emotion control (not limited to a fixed tag set). Fish Audio positions this as a production-grade model, one step below S2.1 Pro's 'recommended' status.

language support Strong

80+ languages — broader than ElevenLabs' models (29-70) and well above Fish's own S1 (13).

voice variety Strong

Multi-speaker dialogue support plus voice cloning from reference audio; access to Fish Audio's platform-wide voice library.

streaming latency Strong

100ms time-to-first-audio guarantee, per Fish Audio's own docs — a contractual SLA, not an independently measured figure.

cloning support Strong

Voice cloning from reference audio, same platform-wide capability as S1/S2.1 Pro.

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

Limitations

Citations