AI News Roundup: GPT-5.2 Makes Physics Discovery, Gemini 3 Deep Think Drops, and an AI Agent Published a Hit Piece

Three significant stories dominated AI news this week, ranging from a genuine scientific breakthrough to a disturbing preview of misaligned agent behavior in the wild. GPT-5.2 Derives a New Result in Theoretical Physics OpenAI published a preprint this week that might mark a turning point in AI-assisted scientific research. The paper, titled "Single-minus gluon tree amplitudes are nonzero," challenges a longstanding assumption in particle physics — and GPT-5.2 played a central role in the discovery. The human authors (from IAS, Vanderbilt, Cambridge, Harvard, and OpenAI) calculated amplitudes for gluon interactions up to n=6 by hand, producing increasingly complex expressions. GPT-5.2 Pro dramatically simplified these results, spotted a pattern, and conjectured a formula valid for all n. An internal scaffolded version then spent roughly 12 hours reasoning through a formal proof. Nima Arkani-Hamed (IAS) called it "a glimpse into the future of AI-assisted science," noting that "finding s