Text-to-speech
Fish Audio S2 Pro requirements, license & speed
By Fish Audio · released 2026-03-09 · 4B slow AR + 400M fast AR parameters
Commercial useNo
Min memoryNot stated
Runs on CPUUnknown
StreamingYes
Key facts
- License
- Fish Audio Research License source
- Commercial use
- No sourceResearch/non-commercial free; commercial needs a separate license from Fish Audio
- Parameters
- 4B slow AR + 400M fast AR source
- Minimum memory
- Not stated by source
- Runs on CPU
- Unknown
- Streaming
- Yes source
- Voice cloning
- Yes source10-30 s reference audio
- Languages
- zh, en, ja, ko, es, pt, ar, ru, fr, de, sv, it, tr, no, nl, cy, eu, ca, da, gl, ta, hu, fi, pl, et, hi, la, ur, th, vi, jw, bn, yo, sl, cs, sw, nn, he, ms, uk, id, kk, bg, lv, my, tl, sk, ne, fa, af, el, bo, hr, ro, sn, mi, yi, am, be, km, is, az, sd, br, sq, ps, mn, ht, ml, sr, sa, te, ka, bs, pa, lt, kn, si, hy, mr, as, gu, fo source
- Released
- 2026-03-09 sourceHugging Face repo creation date (proxy for release date)
- Gated on HF
- No
Measured speed & memory
Benchmark pending. We haven't measured Fish Audio S2 Pro yet. Planned targets: Raspberry Pi 5, CPU-only x86, Apple Silicon Mac and consumer GPUs. Get notified.
Accuracy
We don't run accuracy evals. For quality and intelligibility, check the Hugging Face Open TTS Leaderboard.
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