Opus 5.5 is live in Perspective AI.
Anthropic's new flagship, built for long multi-step work inside large codebases. It succeeds Opus 5. No Max plan to buy. It sits in the same list as everything else.
Opus 5.5 made this in 5 hours, one-shot.
Keep building.
4 frontier AI models for $0?
Clean APIS just changed the game Kimi K3. Claude Opus. GPT-5.6. Gemini 3.1 Pro. Clean APIs currently offers 5M free tokens every month, with no card required, and its free tier gives access to all 33 models. What you get: Kimi K3 - 2.8T
Opus 5.5 is quietly the best value model Anthropic has shipped.
Anthropic just published the official playbook for Opus 5.5, written by Addy Osmani, who spent years on Google's Chrome team. 40% cheaper than Opus 5. Cache reads 60% cheaper. Fable 5.1 level on most tasks. Runs
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