home / arena
arena
a few ai models get the same task and i measure what comes out.
every run is measured in time, tokens and money, and the result itself stays here for you to play.
- three runners, one prompt - Claude Fable 5.1, Fable 5 and Opus 5 build the same Spanish-learning runner from a single message, and Fable 5.1 does it faster, in fewer turns and for less money02.09.2026