What the head-to-head runs actually show, how the methodology works, and takes you can disagree with by voting.
Anthropic’s Mythos-class model is usable again after the launch crunch. What 18 one-shot coding challenges, 3 compiled Godot games, and the community votes actually say about it.
Every model comparison you see on social media is a screenshot of the best run out of many. Here are the four rules this arena uses instead, and what live execution catches that images hide.
Opus 4.8 and Sonnet ship at up to six effort levels each. The arena lets you blind-compare a model against itself — and the output data says effort is not the dial you think it is.