models · stepfun-ai

StepAudio 2.5 TTS (Aug 2026)

text-to-speech model ranked in the Artificial Analysis text-to-speech arena. Closed — third-party arena results, no weights held here.

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What this registry has checked

Closed. A third party reports this model and we have recorded their numbers. Nothing of our own: no weights seen, no publisher hash held. Treat every figure here as their claim.

Method	third-party-report

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What is recorded

Publisher	stepfun-ai
Origin	China
Licence	Apache-2.0
Modality	text-to-speech

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Registry record as of 2026-09-04. Identity, licence and parameter count are properties of a release and do not move; tier can, and the verify link above re-checks it against the live registry rather than this page.