NEAR AI's open-source Lean agent solves all of Putnam Bench for just $111

lukaszkaiser · x · 2026-09-06

NEAR AI's Lean agent solved ALL problems on Putnam Bench—672 problems from the hardest undergraduate math competition in the world—for a total of $111, at 1/250 the cost of the second cheapest submission. The project is fully open source, showing how formal proof agents are driving down the cost of hard mathematical reasoning.

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