@MaxForAI: A brutal fact: AI's mathematical abilities have already surpassed 99% of humans on this planet. @MenloVentures partner Deedy @deedydas, who invested in Anthropic and OpenRouter, conducted a test. He used the just-concluded 2026 International Mathematical Olympiad...
Summary
AI models Fable, Sol, K3, and Axiom all achieved a perfect score of 42/42 in the 2026 International Mathematical Olympiad, solving the competition completely for the first time at low cost. Among them, Claude Fable 5 was the fastest, while GPT 5.6 Sol had the lowest cost.
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A brutal fact: AI’s math ability has already surpassed 99% of humans on this planet.
@MenloVentures partner Deedy @deedydas, who has invested in Anthropic and OpenRouter, ran a test.
He used the original problems from the just-concluded 2026 International Mathematical Olympiad (IMO) to test AI.
This is the world’s toughest high school math competition, and it has long been one of the most common benchmarks for evaluating AI models’ mathematical capability.
He put Fable (high), Sol (xhigh), K3 (max), and Axiom through the contest — all scored a perfect 42/42.
For reference, over the past 7 competitions, a total of 4,347 human participants have taken part, and only 30 achieved a perfect score of 42 — a rate of 0.69%.
- Claude Fable 5 solved all problems in a single attempt and was the fastest.
- GPT 5.6 Sol took one extra attempt but had the lowest cost.
- Kimi K3 also managed it, but required 4 extra attempts and consumed a large number of tokens.
Based on the number of attempts and token consumption, problems 3 and 6 were the hardest, followed by problem 2.
Human students have 9 hours to solve these 6 problems; Fable and Sol both finished within 4 hours.
This is the first time the International Mathematical Olympiad has been completely solved.
Last year, the best-performing models were the unreleased Gemini Deep Think and an experimental OpenAI model — both scored 35/42.
This year, three publicly accessible models, including one (K3) about to open-source its weights, accomplished this at a cost of just $10 to $50!
AI’s capability has officially far surpassed the level of the International Mathematical Olympiad.
Deedy (@deedydas): The International Math Olympiad (IMO) 2026, the hardest math contest for high schoolers, just ended.
I ran Fable (high), Sol (xhigh), K3 (max) and Axiom against it and all got a perfect score of 42/42 (repo below if you want to check their solutions): — Claude Fable 5 was the
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