Lilian Weng rejoins OpenAI to work on recursive self-improvement models

Lilian Weng leaves Thinking Machines, rejoins OpenAI in days

Lilian Weng exits Thinking Machines Lab citing seven months of illness, rejoins OpenAI 24 hours later as recursive self-improvement lead. The move signals unsustainable pace in AI: TML has lost 13 of 42 founders to bigger offers from OpenAI and Meta, illustrating talent consolidation toward mega-cap competitors.