Step Audio EditX (Mar 2026) text-to-speech model
StepFunOpenCNReleased Feb 2026.
Step Audio EditX (Mar 2026) is a text-to-speech (TTS) model from StepFun. It ranks #41 of 98 on the Artificial Analysis TTS arena with Elo 1100 (95% CI ±12, 2,359 samples). Weights are openly available for self-hosting. Released Feb 2026.
Key facts
- Provider
- StepFun
- AA rank
- #41 / 98
- AA Elo (95% CI)
- 1100 ±12
- AA samples
- 2,359
- TTS Arena Elo (uncertainty)
- –
- TTS Arena votes
- –
- TTS Arena win rate
- –
- Price (per 1M chars)
- –
- Released
- Feb 2026
- Open weights
- Yes
- License
- –
- Voices tested by AA
- 2
- Languages
- –
- Voice cloning
- –
"–" means the upstream sources do not provide this value; we do not guess.
Nearby models
By AA Elo; this model highlighted| # | Model | AA Elo | Arena Elo | Price $/1M chars | Open weights |
|---|---|---|---|---|---|
| 38 |  Fish Audio S2 Pro Fish Audio | 1110 | – | $15 | Open |
| 39 | RChatterbox HD Resemble AI | 1110 | – | $40 | – |
| 40 |  TTS-1 HD OpenAI | 1103 | – | $30 | – |
| 41 | Step Audio EditX (Mar 2026) StepFun | 1100 | – | – | Open |
| 42 |  Turbo v2.5 ElevenLabs | 1099 | 1497 | $50 | – |
| 43 | HSpeech 2.6 Hithink | 1097 | 1491 | – | – |
| 44 | Multilingual v2 ElevenLabs | 1096 | 1500 | $100 | – |
Alternatives · More from StepFun
| # | Model | AA Elo | Arena Elo | Price $/1M chars | Open weights |
|---|---|---|---|---|---|
| 15 | StepAudio 2.5 TTS (Aug 2026) StepFun | 1214 | – | $85 | – |
| 32 | Step TTS 2 (Mar 2026) StepFun | 1140 | – | $40 | – |
Alternatives · Top 5 open-weight by AA Elo
| # | Model | AA Elo | Arena Elo | Price $/1M chars | Open weights |
|---|---|---|---|---|---|
| 9 | Fish Audio Drama 3 Preview Fish Audio | 1248 | – | $15 | Open |
| 11 | BBreeze TTS 2 BreezeBlue | 1230 | – | $34 | Open |
| 19 |  Ming-3.0-tts Ant Group | 1191 | – | – | Open |
| 38 | Fish Audio S2 Pro Fish Audio | 1110 | – | $15 | Open |
| 46 |  Voxtral TTS Mistral | 1091 | – | $16 | Open |
FAQ
Where does Step Audio EditX (Mar 2026) rank among TTS models?
As of Oct 25, 2026, Step Audio EditX (Mar 2026) ranks #41 of 98 on the Artificial Analysis TTS leaderboard with Elo 1100 (±12).
Is Step Audio EditX (Mar 2026) open source?
Yes. Step Audio EditX (Mar 2026) has open weights and can be self-hosted.
What is the best Chinese TTS model?
By AA Elo, the top model from a Chinese provider is Qwen-Audio-3.1-TTS-Plus by Alibaba (Elo 1307, #3 overall).
Which top-10 TTS model is cheapest?
Among the AA top 10, the lowest list price is Simba 3.2 (SpeechifyAI) at $6.6 per 1M characters, Elo 1246.
What is the best open-source TTS model?
By AA Elo, the top open-weight model is Fish Audio Drama 3 Preview by Fish Audio (Elo 1248, #9 overall); 18 open-weight models have an AA score.
Sources
"–" means the upstream sources do not provide this value; we do not guess.