AdvertisementAfter leaving OpenAI, Weng co-founded Thinking Machines Lab in February 2025 alongside former OpenAI CTO Mira Murati and other collaborators. On July 4, 2026, Weng published a detailed exploration of recursive self-improvement on her blog, Lil’Log. That blog has long been a go-to resource for AI researchers and practitioners. Her post laid out frameworks for thinking about how self-improving systems could actually be built and constrained. Recursive self-improvement is the idea that an AI system can make itself better, and then that improved version can make itself even better, and so on.