"Opus 5.5 performs at the level of Claude Fable 5.1 for most tasks, and costs 40% less to run than Opus 5."

Doran.artisan.cashSep 2235

Explorable Explanation on How the Web works made with Opus 5.5 medium effort.

Opus worked for 4+ hours and made this experience in a single shot. Only a bunch of interconnected HTML files. Inspired by ncasenmare Explore it yourself here -

NityeshSep 22

A cheaper and faster model

This model performs on par with Claude Fable 5.1 in most tasks, but is about 30% faster and 40% cheaper than Opus 5. Also, the 5-hour session limit for Claude Code users has increased by 20%, and Pro, Max, and Team users have the option to reset the weekly limit once.

زیوست | ZivestSep 22

Xiaomi's MiMo-V2.6-Pro lands within 1-4 points of Claude Opus 5 and GPT-5.6 Sol on agent benchmarks, MIT licensed.

Its training ran on a public dashboard. #MiMoV26 #AITransparency Full edition and full episode:

Shared SapienceSep 22