StepFun StepAudio 3 preview models are free for a limited time
Four StepAudio 3 preview models free until Nov 17 Beijing morning
StepFun is offering free access to four StepAudio 3 preview models for realtime voice, chat voice, audio generation and music, through 11:59 Beijing time on November 17.
- Eligible plans
- stepaudio-3-realtime/chat/gen/music preview
- Eligibility
- StepFun platform users; personal accounts usually need real-name verification for speech features
- Benefit duration
- Free through 11:59:59 Beijing time on 2026-11-17; preview IDs then retire for paid production versions
- Claim by
- 2026-11-17
The briefing
On the StepFun open platform, four StepAudio 3 preview models are free to call for a limited time: realtime voice, chat voice, general audio generation and music generation. The free window runs through 11:59:59 Beijing time on November 17. From noon that day, the new prices apply and the preview models are replaced by paid production versions.
What you can use
These four preview model IDs are free during the window:
- stepaudio-3-realtime-preview for realtime voice chat
- stepaudio-3-chat-preview for voice chat over Chat Completions
- stepaudio-3-gen-preview for general audio generation
- stepaudio-3-music-preview for music generation
TTS, standalone ASR, voice cloning and voice design are not part of this free window and stay on the paid price list. Personal accounts usually need real-name verification before using speech features.
How to use
- Open the StepFun platform, sign in, complete verification if prompted, and create an API key.
- Call the four preview model IDs above, or try them first in the audio studio.
Details: API pricing and StepAudio 3 Realtime docs.
