Claude's new system prompt doesn't want to reproduce song lyrics(simonwillison.net)

52 points by Bluestein 1 month ago | 37 comments

Claude Token Counter, now with model comparisons(simonwillison.net)

187 points by twapi 6 months ago | 73 comments

Scaling long-running autonomous coding(simonwillison.net)

165 points by srameshc 9 months ago | 89 comments

The Zig project's rationale for their anti-AI contribution policy(simonwillison.net)

618 points by lumpa 5 months ago | 401 comments

Simon Willison note on Zig's strict anti-LLM contribution policy and its rationale, noting Bun's fork of Zig and its AI-assisted compiler improvements.

Claude Fable is relentlessly proactive(simonwillison.net)

676 points by lumpa 4 months ago | 556 comments

Simon Willison blog post describing Claude Fable 5 as relentlessly proactive, illustrated with an example of fixing a scrollbar glitch in Datasette Agent.

Reverse-engineering is cheap now(simonwillison.net)

23 points by edward 3 months ago | 13 comments

Claude Opus 4.7(anthropic.com)

1922 points by meetpateltech 6 months ago | 1403 comments

Anthropic's announcement post introducing Claude Opus 4.7, a new version of its Claude AI model, dated April 16, 2026.

Claude Opus 4.1(anthropic.com)

801 points by meetpateltech 1 year ago | 301 comments

Anthropic announcement page for Claude Opus 4.1, a new version of its Claude Opus large language model, dated August 5, 2025.

Claude Opus 4.6(anthropic.com)

2277 points by HellsMaddy 8 months ago | 982 comments

Anthropic's announcement post introducing Claude Opus 4.6, a new version of its flagship AI model, dated February 5, 2026.

Anthropic publishes the 'system prompts' that make Claude tick(techcrunch.com)

373 points by gemanor 2 years ago | 233 comments

TechCrunch article reporting that Anthropic has published the system prompts used to guide its Claude AI models.

Claude Opus 4.8(anthropic.com)

1708 points by craigmart 5 months ago | 1334 comments

Anthropic's announcement post introducing the Claude Opus 4.8 AI model, dated May 28, 2026.

Writing code by hand is over, forever(eliocapella.com)

11 points by aray07 22 days ago | 8 comments

A personal blog post by a developer of 18 years explaining how Claude Code with Opus 4.5 led him to stop writing code by hand entirely.