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StepFun Step-Audio-EditX
Model idstepfun-ai/Step-Audio-EditX
PricePrice not published
Checked29 September 2026
Where it stands
80newer speech and audio models since its release
- NVIDIA Nemotron 3.5 Transcribe (30B-A4B)28 Oct 2026
- Hy-SimulMT-30B-A3B22 Oct 2026
- Eleven Realtime v1 Max / Mini20 Oct 2026
- Voxtral Mini Transcribe 3 (+ Mini Transcribe Realtime 3)20 Oct 2026
- Voxtral Small Transcribe 320 Oct 2026
The 5 newest are listed. All speech and audio models
- After it from StepFun
- StepAudio 3 Realtime15 Sep 2026
- Weights
- Weights are public. Licence: Apache-2.0. See the licence for commercial terms.
How to call it
3 ways to use StepFun Step-Audio-EditX, with the model id each provider expects.
| Provider | Model id | Endpoint | Docs |
|---|---|---|---|
| Hugging Face | stepfun-ai/Step-Audio-EditX |
huggingface.co | |
| Hugging Face (4-bit) | stepfun-ai/Step-Audio-EditX-AWQ-4bit |
huggingface.co | |
| GitHub | github.com |
Pricing
Price not published.
No price source linked. Checked 29 September 2026.
Specs
- Input
- Text and audio
- Output
- Audio
- Context window
- Not published
- Max output
- Not published
- Open weights
- Yes
- Licence
- apache-2.0 (code; check model card for weights)
- Released
- 6 November 2025
- Status
- Current
- Type
- Speech and audio
What stands out
What its maker marketed at launch, and what people found later, each with its source.
Iterative LLM-based audio editing
3B RL-trained audio LLM that edits emotion, speaking style and paralinguistics of existing speech step by step, plus zero-shot TTS cloning (Mandarin, English, Sichuanese, Cantonese; Japanese/Korean added 2025-11-28).
Notes
Official changelog lists a new model release on 2026-01-29 (overall ~4% improvement; new paralinguistic tags such as exhale, inhale, chuckle, clears throat, giggle; SFT/DPO/GRPO training code released); HF weights updated 2026-01-23/24, README edits to 2026-02-14.
Sources: https://github.com/stepfun-ai/Step-Audio-EditX , https://huggingface.co/stepfun-ai/Step-Audio-EditX
Not yet checked against an official source: No March 2026 release appears in the official GitHub/HF changelog, so Artificial Analysis’s ‘Step Audio EditX (Mar 2026)’ label (#3 open weights, ~1095 Elo, Sept 2026) probably refers to the Jan 2026 weights or a hosted snapshot (unverified).