Model Releases
Note to @AnthropicAI - much as I appreciate the public system prompts this would be so much more valuable to me as a Claude power user if yo…
Note to @AnthropicAI - much as I appreciate the public system prompts this would be so much more valuable to me as a Claude power user if you published the tool descriptions as well Since Anthropic pu
Note to @AnthropicAI - much as I appreciate the public system prompts this would be so much more valuable to me as a Claude power user if you published the tool descriptions as well Since Anthropic publish their system prompts we can generate a diff between Claude Opus 4.6 and 4.7 - here are my notes on what's changed https://simonwillison.net/2026/Apr/18/opus-system-prompt/
Source: Simon Willison (X) | 2026-04-19