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Fish Audio S1

Name: Fish Audio S1
Brand: Fish Audio
Price: 15 USD
Availability: InStock

Audio Available

fish-audio/s1 · by Fish Audio · neural-tts

Pricing — 1 offering(s)

Fish Audio

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 moderate

voice variety strong

streaming latency unknown

cloning support strong

Benchmarks

Benchmark	Score	Config	Source
Word error rate (vendor-reported)	0.8 %	Fish Audio's own reported WER. Not independently re-measured by Modelglass.	source ↗
TTS-Arena2 ranking (independent, community leaderboard)	—	Ranked #1 at time of writing per Fish Audio's own docs — an independent/community leaderboard, not a vendor-run benchmark, though the ranking snapshot itself wasn't independently re-verified by Modelglass.	—

Operator guidance

Fish Audio's own docs label S1 "Previous Model" and recommend s2.1-pro for all new projects — S1 is kept available only "for existing integrations," priced identically to S2 Pro/S2.1 Pro. Use S2.1 Pro instead for anything new; S1 is documented here for operators already integrated against it.

Use cases

Existing integrations already built on S1 (Fish Audio's own guidance — new projects should use S2.1 Pro instead)
Cost-sensitive TTS with strong naturalness at S2/S2.1 Pro's same price point
Expressive narration via 64+ emotion/tone markers using (parenthesis) syntax

Limitations

Fish Audio itself recommends against using S1 for new projects — kept only for existing integrations
Narrower language support (13) than S2 Pro/S2.1 Pro (80+/83) or ElevenLabs' models
No published time-to-first-audio guarantee, unlike S2 Pro/S2.1 Pro's 100ms SLA
Fish Audio's native billing unit is UTF-8 bytes, not characters — see registry pricing notes