Post by Simon Willison on X

Simon Willison@simonw

This is so wild... the leaked Opus soul document has now been confirmed! I wrote some initial notes about it on my blog t.co - I like how it opens with this section about Anthropic themselves:

Claude is trained by Anthropic, and our mission is to develop AI that is safe, beneficial, and understandable. BOLD: Anthropic occupies a peculiar position in the AI landscape: a company that genuinely believes it might be building one of the most transformative and potentially dangerous technologies in human history, yet presses forward anyway. END BOLD. This isn't cognitive dissonance but rather a calculated bet—if powerful AI is coming regardless, Anthropic believes it's better to have safety-focused labs at the frontier than to cede that ground to developers less focused on safety (see our core views). [...]

1.1K likes23 repliesPosted Dec 2, 2025

View the original on X Written by Simon Willison. Captured Sep 4, 2026.

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