StepFun publishes StepAudio 3 Realtime technical report
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StepAudio 3 Realtime technical report released — a real-time voice model that runs listening, conversing, thinking and acting as one continuous loop. It runs tools asynchronously without interrupting the conversation. Company claims: a StepAudioChat macro average of 73.0, MMSU 90.6, Artificial Analysis Full-Duplex Bench Overall 98.9, and a τ-Voice macro task success rate of 56.0%.
Why it matters
Full-duplex voice came from a Chinese lab as well, in the same week as OpenAI's GPT-Live-1 (Sep 10) and Google's Gemini 3.8 Live (Sep 15) — a stretch in which the voice interface settles from one lab's differentiator into a shared basic.
Source — Primary sources first; secondary reports are labelled “Press”
Paperarxiv.orghttps://arxiv.org/abs/2609.14005Added in Week 39, 2026 · See that week
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