Simon Willison’s Weblog

I just sent out the September edition of my sponsors-only monthly newsletter. If you are a sponsor (or if you start a sponsorship now) you can access a copy here. The sections this month are:

• Best model for code? GPT-5-Codex... then Claude 4.5 Sonnet
• I've grudgingly accepted a definition for "agent"
• GPT-5 Research Goblin and Google AI Mode
• Claude has Code Interpreter now
• The lethal trifecta in the Economist
• Other significant model releases
• Notable AI success stories
• Video models are zero-shot learners and reasoners
• Tools I'm using at the moment
• Other bits and pieces

Here's a copy of the August newsletter as a preview of what you'll get. Pay $10/month to stay a month ahead of the free copy!