Claude Mythos 5 Beat the Quantum Experts. We Checked

Anthropic says Claude Mythos 5 worked for 53 hours and invented a quantum algorithm humans couldn't make practical. We read the paper, checked every number, and rebuilt the AI's algorithm to try to break it. QUICK FACTS (checked Oct 17, 2026) 7 of 8 tasks beat the best published designs (not 8 of 8) Google's decoder: 5.1M to 440K Toffoli gates, 12x cheaper "17x fewer gates" is real but uses 12% more qubits "9,100x cheaper" is not in the paper Nothing has run on a real quantum computer yet OUR TEST We rebuilt the AI's new algorithm in Python and ran 100,000 random inputs on two real curves (NIST P-256 and Bitcoin's secp256k1): 103,368,405 choices, 0 wrong. SOURCES Anthropic: https://www.anthropic.com/research/de... Paper (arXiv 2610.22367): https://arxiv.org/abs/2610.22367 Google's design (arXiv 2510.10967): https://arxiv.org/abs/2510.10967 CHAPTERS 0:00 53 hours, one new algorithm 0:59 How Anthropic's AI actually worked 2:39 Why give an AI quantum circuits? 3:32 Beating Google's design (12x) 4:50 Claim vs reality 6:03 The algorithm humans couldn't make work 6:57 Our test: zero wrong 7:37 What this means for AI 8:42 Verdict If an AI can invent math like this in two days, what should it work on next? 3D scenes built in code by AI Decoded. Original music. Narration uses an AI-generated voice. #AI #QuantumComputing #Claude