All tasks / Models
StepAudio 2.5 TTS (Aug 2026)
StepFun's closed text-to-speech model line served through the StepFun API platform.
- StepFun
- Closed
- Released 26 Aug 2026
Where it ranks
- BText to speechModels · Cloud · 1,216 on Artificial Analysis Speech Arena: Text to Speech (provider voices)
Facts
- Vendor
- StepFun
- Family
- StepAudio TTS
- Released
- 26 Aug 2026
- Weights
- Closed: API and apps only
- License
- proprietary
- API price
- $85 per 1M characters (Artificial Analysis normalised price for StepAudio 2.5 TTS (USD per 1M characters).)
- Last verified
- 19 Oct 2026
Price from artificialanalysis.ai, 19 Oct 2026.
Benchmark results
| Benchmark | Result | Entry on the leaderboard | As of | Source |
|---|---|---|---|---|
| Artificial Analysis Speech Arena: Text to Speech (provider voices) | 1,216 | StepAudio 2.5 TTS (Aug 2026)Provider Voice Arena, all categories and accents; rank 14 of 96, 2028 appearances; raw value from the page's embedded data; no last-updated date shown, so as_of = retrieval date. | 19 Oct 2026 | artificialanalysis.ai |
Where you can use it
No tracked tool lists this model yet.
Earlier versions
- Step TTS 2 (Mar 2026) · 12 Feb 2026