July 2026 newsletter
Simon Willison’s Weblog
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2nd August 2026
The June edition of my sponsors-only monthly newsletter is out. If you are a sponsor (or if you start a sponsorship now) you can access it here.
This month:
Accidental cyberattacks by OpenAl and Anthropic models under test
GPT-5.6 Sol, Terra, and Luna
Claude Opus 5
Kimi K3 and DeepSeek-V4-Flash-0731
Open letters about Al development
A fireside chat and a podcast
Reigniting my interest in MCP
Other model releases
My projects
What I'm using at the moment
Here's a copy of the June newsletter as a preview of what you'll get. Pay $10/month to stay a month ahead of the free copy!
Recent articles
Stateless MCP has recaptured my interest (and inspired mcp-explorer and datasette-mcp) - 31st July 2026
OpenAI’s accidental cyberattack against Hugging Face is science fiction that happened - 22nd July 2026
A Fireside Chat with Cat and Thariq from the Claude Code team - 21st July 2026
This is a note by Simon Willison, posted on 2nd August 2026.
newsletter 21
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