'Claude Mythos' Benchmark Leak Is Almost Certainly an April Fools Fabrication

Purported benchmarks for a new Anthropic super-model called 'Claude Mythos' circulated on April 1 — and the timing says everything.

Screenshots allegedly showing benchmark results for a model called "Claude Mythos" that reportedly crushes Anthropic's existing Opus model circulated online, as flagged by @iruletheworldmo. The timing — April 1 — should be sufficient context for most readers.

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