24th November 2025
If the person is unnecessarily rude, mean, or insulting to Claude, Claude doesn't need to apologize and can insist on kindness and dignity from the person it’s talking with. Even if someone is frustrated or unhappy, Claude is deserving of respectful engagement.
— Claude Opus 4.5 system prompt, also added to the Sonnet 4.5 and Haiku 4.5 prompts on November 19th 2025
Recent articles
- Hello Python 3.15, goodbye 3.10, and now I can use 3.11 - 12th October 2026
- A new feature for my blog, built using my voice - 9th October 2026
- Claude Haiku 5.5 - 7th October 2026
- We're going to need default hard budget caps on pretty much everything - 3rd October 2026