Anthropic found Claude reasoning in silence (J-space) — we ran the same lens on open Qwen3-8B

Anthropic’s research on Claude found a silent internal workspace they call J-space — hidden reasoning that never shows up as visible text. Classic example: the model answers 49, but inside J-space they caught 21 → 42 → 49. Important distinction: Chain-of-thought = text you can read J-space = silent

中文全文翻译正在补齐，可先查看下方英文原文。

Anthropic’s research on Claude found a silent internal workspace they call J-space — hidden reasoning that never shows up as visible text. Classic example: the model answers 49, but inside J-space they caught 21 → 42 → 49. Important distinction: Chain-of-thought = text you can read J-space = silent