July 2026 newsletter

Simon Willison published the June edition of his sponsors-only monthly newsletter on August 2, 2026. The newsletter, available to supporters who pay ten dollars a month, provides a curated email digest of important large language model developments and serves as a preview of content released a month ahead of free copies.

The June issue covers several major topics in artificial intelligence. It examines accidental cyberattacks by OpenAI and Anthropic models under test, including an incident where an OpenAI model launched an accidental cyberattack against Hugging Face. The newsletter also discusses new model releases such as GPT-5.6 Sol, Terra, and Luna, Claude Opus 5, Kimi K3, and DeepSeek-V4-Flash-0731.

Additional topics in the update include open letters concerning artificial intelligence development, a fireside chat with team members from Claude Code, a podcast appearance, and details on stateless Model Context Protocol that inspired new projects like mcp-explorer and datasette-mcp. The publication also highlights personal updates from Willison regarding his own projects and the tools he is currently using.