Machine Learning Algorithms & Natural Language Processing
Jul 21, 2026 · Artificial Intelligence
AI’s Fable 5 Overnight Refutes Jacobian Conjecture, Dashing Zhang Yitang’s 7‑Year Quest
An Anthropic AI model, Claude Fable 5, produced a concise counterexample that disproves the 87‑year‑old Jacobian conjecture, sparking worldwide reaction and highlighting both the mathematical breakthrough and the poignant story of Zhang Yitang’s seven‑year effort.
AI mathematicsClaude Fable 5GPT-5.6
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