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
Atlabs × Claude Opus 5.5 🐦
Anthropic's newest model: Fable-level intelligence, 40% cheaper to run and 30%+ faster than Opus 5. Starting today, it powers the atlabs intelligence agent for storytelling. Every story needs a messenger. Ours just got an upgrade.
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