there goes my weekend!
Claude (@claudeai)
Introducing Claude Opus 5.
It's a thoughtful and proactive model that comes close to the frontier intelligence of Fable 5 at half the price.
Video
— https://nitter.net/claudeai/status/2080699495453528290#m
Author Anita Kirkovska reacted “there goes my weekend!” to Claude’s announcement…
Brief
Anita Kirkovska responded enthusiastically (“there goes my weekend!”) to Claude’s 2026-07-24 reveal of Claude Opus 5. Claude markets Opus 5 as a “thoughtful and proactive” model that nearly matches Fable 5’s frontier intelligence but at about half the price; the launch post includes a short video and a link to the original tweet.
Why it matters
Author Anita Kirkovska reacted “there goes my weekend!” to Claude’s announcement of Claude Opus 5 on 2026-07-24, implying she expects to spend significant time testing it.
Key details
- Claude’s post claims Claude Opus 5 is “thoughtful and proactive” and approaches the frontier intelligence of Fable 5 while costing roughly half as much; the announcement includes a video and a link to the original Claude tweet.