NetEase Youdao's Confucius4-R2T2: Streaming ASR That Never Rewrites Its Output

dr_cintas · x · 2026-11-06

drcintas kicks off a paper walkthrough of NetEase Youdao's Confucius4-R2T2. Streaming ASR has a hidden problem: most models keep rewriting their output, causing flickering subtitles and voice agents reprocessing the same sentence. R2T2 claims to fix this by never rewriting emitted text. Built on Qwen3-ASR, it supports configurable 80ms–2s decoding chunks, append-only output, 200–600ms average latency with no offline accuracy loss, vLLM and transformers backends, context/hotword prompts, and is Apache 2.0 open source. The thread analyzes what actually works and what could be better.

Related event: NetEase Youdao Open-Sources Confucius4-R2T2: Streaming ASR That Never Rewrites Output(8 posts)→

Original post →

More from Models

Models channel →