StepFunWeights not listed·Not published context·— params
StepAudio 3 Realtime Previewstepfun/stepaudio-3-realtime-preview
StepAudio 3 Realtime Preview supports full-duplex voice conversations, interruption handling, reasoning and tool use over a persistent WebSocket connection.
Availability and billing notes
Reviewed September 21, 2026 · check the linked provider documentation for later changes.
Model ID stepaudio-3-realtime-preview. Use the Realtime API for bidirectional speech; this is separate from the turn-by-turn Chat variant.
The official pricing page lists a limited-time free preview as of September 21, 2026. StepFun says the preview ID will be retired when a paid version launches; this is not a permanent free-tier promise.
Capabilities
- realtime
- speech_understanding
- speech_generation
- tool_calling
Technical specs
- Context
- Not published
- Max output
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- Parameters
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- Release
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- Training cutoff
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- License
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Similar models
Compare with
- StepAudio 3 Realtime Preview vs Qwen3.8 LiveTranslate Flash RealtimeComparison planned — not yet published
- StepAudio 3 Realtime Preview vs StepAudio 3 Chat PreviewComparison planned — not yet published
- StepAudio 3 Realtime Preview vs StepAudio 3 Gen PreviewComparison planned — not yet published
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