Anthropic just rewrote how Opus 5.5 thinks, and half of your old code is now broken
This is the biggest change to how you talk to Claude since thinking was introduced, and most developers haven't noticed yet: this is an 8-step blueprint on how to move from Opus 5 to Opus 5.5
20 prompts for Opus 5.5, each generates a working HTML file - such as a game, terminal, 3D scene, or text - in a single run.
I tested all 20 and kept only those that build without any manual tweaks. The best result: an animated terminal featuring a 3D crystal made of 250 glass
Claude Opus 5.5 × Unreal Engine 5
The sound of a PC fan spinning at full speed, A room where only faint environmental sounds echo. --24 hours later. Before I knew it, the place with only one street had become a city. It's still far from complete, but it already looks like a ``city.'' It's too big to walk around, and it's a pain if you don't run.
Haiku 5.5 is coming in TWO WEEKS
Polymarket gives it a 95% chance I think it will reach the level of Opus 5 with its incredibly high speed and low price Deepseek Flash and GPT Luna should start shaking because Haiku is very close
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