GPT-6 Astra saturates benchmarks, but Anthropic's Fable 5.1 retakes crown 48 hours later

PeterDiamandis · x · 2026-09-08

Peter Diamandis rounds up a frenetic AI week: GPT-6 Astra hit 99.9% on ARC AGI 3, 98% on FrontierMath and 100% on Exploitbench, yet Anthropic's Fable 5.1 retook the broad-capability crown within 48 hours and formalized Fermat's 358-year-old proof across 13 million lines, proving 29,000 new theorems en route. Tesla also launched Cybercab robotaxis at $30K vs Waymo's $100K+ per vehicle, and GLP-1 drugs extended mouse lifespans by 100 days.

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