"A Review of Anthropic’s Global Workspace Paper" by Neel Nanda

The below is a public review Anthropic asked me to write for their new global workspace paper. I recommend at least skimming their paper first. TLDR: I think this is a fantastic paper - it presents compelling evidence for some kind of "cognitive space" in models, that is used as a "working memory" for intermediate variables during a forward pass, shows that J-Lens is a useful technique for accessing this space. I believe these key claims.I believe J-Lens will be a useful (but limited) tool in practice for model forensics, e.g. generating hypotheses about unusual model behaviour during alignment audits.I discuss my mental models for why a cognitive space should exist, and first principles arguments for why J-Lens should work for accessing itI assess the paper's evidence that this cognitive space exists, and the paper's evidence that J-Lens is practically useful.We have replicated the core claims on Qwen 3.6 27B, and also share preliminary evidence of extending this work by finding abstract "interpretative meta-tokens", like Chinese characters for "what does this mean" that seem to activate and play a causal role on processing ambiguous sentences. What claims is this paper making? In my opinion this [...] ---Outline:(01:27) What claims is this paper making?[... 28 more sections]--- First published: July 6th, 2026 Source: https://www.lesswrong.com/posts/zFJ3ZdQwrTWE9jT5S/a-review-of-anthropic-s-global-workspace-paper --- Narrated by TYPE III AUDIO. ---Images from the article: