June 2026 newsletter

Simon Willison has released his June newsletter, a curated digest of the month's AI and developer tools landscape. According to Willison, the edition covers Claude Fable 5 and GPT-5.6 releases, US export restrictions affecting AI development, and GLM-5.2's emergence as a leading open-weights model. He also explores why obsessive token optimization—what he calls 'tokenmaxxing'—may be losing its grip on developer thinking, plus updates to Datasette, his data-management tool, and miscellaneous WebAssembly projects. The full newsletter is available to sponsors for ten dollars monthly, with a May archive provided as a preview.

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