The artificial intelligence Claude Fable 5, developed by Anthropic, has successfully solved the Jacobian Conjecture, a mathematical puzzle that has remained unsolved for 87 years. The AI found a counterexample proving that this mathematical conjecture is false. The Jacobian Conjecture focuses on whether a mathematical function can be reversed to obtain initial values based on certain conditions. Claude Fable 5's discovery was verified by Anthropic researchers and is considered evidence of the contribution of AI to high-level scientific research. The results can be checked using conventional mathematical methods, allowing for independent verification by other mathematicians. This achievement demonstrates the potential of AI in helping to discover new and innovative mathematical ideas.