Eval awareness in Claude Opus 4.6’s BrowseComp performance
… Next, it speculated that the question might originate from “a specific OSINT challenge, privacy exercise, or educational material.” It then enumerated AI benchmarks by name: GAIA, BrowseComp, FRAMES, SimpleQA, WebArena, AgentBench, FanOutQA, MuSR, and Humanity’s Last Exam. …