NetEase Youdao Open-Sources Confucius4-R2T2, a Streaming ASR That Never Rewrites Committed Text

rohanpaul_ai · x · 2026-09-18

NetEase Youdao open-sourced Confucius4-R2T2, a low-latency streaming ASR model with configurable 80ms–2s decoding chunks and an append-only output mode: once transcript text is committed, it is never revised. Rohan Paul highlights why this matters for agents — voice agents should consume speech incrementally but act only on committed text, since mutating transcripts corrupt downstream agent state. Targeted use cases include live captioning, NLP/LLM-agent pipelines, and simultaneous translation. The repo ships WebSocket server/client examples for quick deployment.

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