Opus 5.5 vs Opus 5 on 9 real Windows tasks: Explorer, Notepad, msinfo32, a browser, a video site.
Same code, same machine, judged on the files on disk. Opus 5: 9/9 Opus 5.5: 7/9 Both misses: old Win32 dialogs. GPT-6 Sol is running the same 9 now. Clip: Opus 5.5, real time.
I installed opus 5.5 into a fly.
It turned 10 sol into 31.6 sol. Astra 6 in the fly next to it went to 2.9. same body. same feed. same 10 SOL. only the brain was different. every fly got two buttons: → RED: ape the ping right now → GREEN: wait for the rule ASTRA went first.
One early tester finished a 680,000-line code migration with Claude Opus 5.5 in less than a day
Work Anthropic says would have taken an engineering team weeks. And on typical workloads it costs 40% less to run than Opus 5.
Claude has released Opus 5.5.
Claudeai I swear your old models get dumber once you launch a new model Sonnet 5 used to be on fire helping me code with little to no mistakes Now give a very small task and he would f things up unless you use a "better" model
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