GPT-5.2 Pro conjectured a formula for single-minus gluon tree amplitudes, and an internal scaffolded GPT-5.2 spent roughly 12 hours producing a formal proof, with the preprint available on arXiv.
Added to The Deploy Log , updated . Read Edition 21, the edition that carried it.
60 rows from OpenAI in The Deploy Log are dated on or before this one, this one included.