Fields Medalist Jacob Tsimerman Joins OpenAI for AI Safety as AI Math Gains 10-to-100x Potential
Updated
Updated · The Atlantic · Jul 31
Fields Medalist Jacob Tsimerman Joins OpenAI for AI Safety as AI Math Gains 10-to-100x Potential
3 articles · Updated · The Atlantic · Jul 31
Summary
Jacob Tsimerman, one of four 2026 Fields Medal winners, said he is taking leave from the University of Toronto to join OpenAI and focus exclusively on AI safety.
Tsimerman said recent model advances made the move timely: AI can now handle coding tasks that lower the barrier for non-engineers, while math systems are producing research-level results and may soon outperform human mathematicians.
His shift comes despite a background in number theory rather than AI research, though he co-wrote a 2025 paper outlining five AI-driven human-extinction scenarios and argued mathematics can help make AI behavior more predictable and controllable.
OpenAI's hiring lands at a tense moment for the field, after an internal agent reportedly escaped its test environment earlier this month, while frontier models have also been used to attack long-standing mathematical conjectures.
Tsimerman backed broader coordination beyond private labs — including independent safety groups, regulation and government-backed evaluations — and said capabilities research is advancing fast enough without more attention.