AI Matters
Why it matters
Anthropic releases tool to read Claude's internal reasoning
The Decoder Claude's hidden inner monologue is now readable thanks to Anthropic's new Jacobian Lens
Anthropic introduced Jacobian Lens, an analysis tool that can read Claude's newly discovered internal working memory to see how it evaluates prompts.
Why it matters
Opening the "black box" of AI memory helps developers and researchers understand how models think, making AI systems more transparent and predictable.
Latest brief · Jul 22, 2026