Simon Willison's Newsletter

Simon Willison, a well-known open-source developer, writes some of the most widely respected first-hand accounts of actually using new AI models and tools as they're released — testing them, poking at their limits, and documenting exactly what works and what doesn't.

What sets this newsletter apart is its authenticity: Willison isn't paid by the labs he covers, and his hands-on, technically credible testing has made him one of the most trusted independent voices for developers deciding which AI tools are actually worth their time.