Claude Mythos Preview: Anthropic's Unreleased Frontier Model Scores 93.9% SWE-bench Verified, 83.1% CyberGym — Not Being Released to Public

Anthropic·high signal

Anthropic announced Claude Mythos Preview, a frontier model with 'a leap in cyber skills' that outperforms Opus 4.6 across every benchmark: 93.9% SWE-bench Verified (vs 80.8%), 77.8% SWE-bench Pro (vs 53.4%), 82.0% Terminal-Bench 2.0 (vs 65.4%), and 94.6% GPQA Diamond (vs 91.3%). The model will not be made generally available; instead it will be deployed initially to a consortium of ~40 companies including Google, Nvidia, Cisco, Apple, JPMorganChase, Amazon, and Microsoft. Anthropic committed $100M in usage credits and $4M in direct donations to open-source security organizations. Reddit reaction massive: 2,500 upvotes on r/singularity for the main announcement, 508 for benchmarks, 411 on r/ClaudeAI, with 1,399 upvotes for a meme about how Anthropic talks about it.