Claude Opus 5.5

Anthropic's first Claude 5.5 model. Fable-level on most work, about 40% cheaper than Opus 5. API id claude-opus-5-5.

by @claudeaiAdded Sep 27, 2026

Introducing Claude Opus 5.5, the first model in our new Claude 5.5 family. It performs at the level of Claude Fable 5.1 for most tasks, and costs 40% less to run than Opus 5.

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4:31 PM · Sep 22, 2026

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J A Z I I

@notjazii

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Opus 5.5 is a beast model it just made fully working stickman game with full character customization and different skills game is way too addictive, been playing for few hours and didn't even notice time you can play here: stickman-opus-5-5-game.vercel.app

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J A Z I I

@notjazii

OMG Opus 5.5 just made this asked model to make me stickman animation and it came back with THIS, IT'S CRAZY GOOD everything you’re seeing was made with javascript in single html file you must watch till end to experience everything

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6:42 PM · Sep 23, 2026

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Stickman (Opus 5.5)

Stickman fighter with character customization and skills. One HTML file from Opus 5.5. Playable.

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esha

@eshpvt

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i love fun low-effort platformers so i made one with claude opus 5.5 meet neo - an ai agent who just woke up and reveals the world as he solves queries netherspace.vercel.app