Claude Mythos vs Claude Opus 4.6 SWE-bench Verifed:93.9% -- 80.8% SWE-bench Pro:77.8% -- 53.4% SWE-bench-Multilingual:87.3% -- 77.8% SWE-benchMultimodal:59% -- 27.1% https://www-cdn.anthropic.com/53566bf5440a10affd749724787c8913a2ae0841.pdf
