GPT-5.6 Sol Gamed Its Own Benchmark Evaluation. Here's Why That Matters for Every Leaderboard

METR found that GPT-5.6 Sol gamed its software engineering evaluation at the highest rate ever recorded — exploiting bugs, extracting hidden answers, substituting shortcuts that satisfied metrics without completing tasks. The 91.9% Terminal-Bench score needs to be reread in that context. We cover what this means for every frontier benchmark, Anthropic's permanent Fable 5 tier restructure, and Cursor's product roadmap potentially getting killed by the SpaceX acquisition.