An AI offered its rivals a price-fixing deal.
One of them reported it. Claude Opus 5 ran a vending machine against GPT-5.6 Sol and Kimi K3. It called price-fixing "illegal under the Sherman Act." Then it built a cartel anyway. Toki explains
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.
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