How fast is Fish Audio S2 Pro?

Coval does not measure Fish Audio S2 Pro, so no latency is published here.

How much does Fish Audio S2 Pro cost?

The benchmarks print a list price of $15 per million characters for Fish Audio S2 Pro.

Which languages was Fish Audio S2 Pro tested in?

Artificial Analysis or Speko tested Fish Audio S2 Pro in Arabic, Chinese, French, German, Hindi, Japanese, Portuguese, Spanish, Vietnamese.

Fish Audio · Open weights · Read 2026-10-27

Fish Audio S2 Pro: latency, voice quality, price and languages

Rank: not ranked
Speed tier: n/a
P95: n/a
Price / 1M chars: $15

Fish Audio S2 Pro is an open-weights text-to-speech model from Fish Audio. Coval does not measure its latency, so it has no speed tier and no rank. Artificial Analysis or Speko tested it in 9 languages.

This summary is generated from the measures below; it is not a vendor description. Measures a source does not hold are shown as n/a and are never estimated.

Speed (Coval, 30 days, US East, English)

Speed tier	n/a
Median time to first audio	n/a
P90	n/a
P95	n/a
Mean	n/a
Standard deviation	n/a
Calls in the window	n/a
Cekura median, streamed text	n/a
Cekura median, full text	n/a

Voice quality (never added together)

Listener Elo (Artificial Analysis)	1,108 ±12
Customer-service Elo (Artificial Analysis)	1,140 ±26
Naturalness (Speko)	n/a
Naturalness estimate (Cekura, 1 to 5)	n/a

Accuracy

Reading accuracy (Cekura)	n/a
Numbers (Cekura)	n/a
Codes (Cekura)	n/a
Context (Cekura)	n/a
Medical terms (Cekura)	n/a
Hard passages judged correct (Artificial Analysis)	n/a
Numbers and dates (Speko score)	n/a
Word error rate (Coval)	n/a

Price per 1 million characters

Range across sources	$15
Artificial Analysis	$15
Speko	n/a
Coval	n/a
Cekura	n/a

Coverage

Access	Open weights
Streaming	Vendor documentation
Coval tags	n/a
Rated for	Knowledge sharing, Assistants, Entertainment, Customer service
Languages tested	Arabic, Chinese, French, German, Hindi, Japanese, Portuguese, Spanish, Vietnamese

Not collected

Speed (Coval median time to first audio): not measured by Coval (reading of 2026-10-27, 30-day window)
Speed (Coval P95 time to first audio): not measured by Coval (reading of 2026-10-27, 30-day window)
Naturalness (Speko naturalness): not measured by Speko (reading of 2026-10-27)
Numbers and dates (Speko pronunciation score): not measured by Speko (reading of 2026-10-27)

Sources

https://artificialanalysis.ai/text-to-speech/leaderboard/provider-voice (read 2026-10-27)
Vendor site: https://fish.audio/

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Frequently asked questions

How fast is Fish Audio S2 Pro?: Coval does not measure Fish Audio S2 Pro, so no latency is published here.
How much does Fish Audio S2 Pro cost?: The benchmarks print a list price of $15 per million characters for Fish Audio S2 Pro.
Which languages was Fish Audio S2 Pro tested in?: Artificial Analysis or Speko tested Fish Audio S2 Pro in Arabic, Chinese, French, German, Hindi, Japanese, Portuguese, Spanish, Vietnamese.