New AI models

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1. Artificial intelligence · New AI models

   Anthropic says old prompting habits hold back Opus 5.5

   Anthropic made Claude Opus 5.5 the default model on all paid plans. Its new guide advises dropping "think hard" and starting at Medium effort.

   Full story at The Decoder ↗
2. Artificial intelligence · New AI models · Open source

   Runway releases robotics model Praxis-1 as open source

   Praxis-1 comes with open weights and source code under Apache 2.0 and uses knowledge from video training for robot control. It leads the World Action Model category on Nvidia's RoboLab-120 benchmark but cannot yet plan complex action sequences.

   Full story at The Decoder ↗
3. Artificial intelligence · New AI models

   Gemini 4 Carbon tops MathArena at a higher cost

   Google's Gemini 4 Carbon and Anthropic's Fable 5.2 have knocked GPT-6.1 Sol from the top of the MathArena math benchmark. Both cost significantly more.

   Full story at The Decoder ↗
4. Artificial intelligence · New AI models · Cloud & data centers · Programming & dev tools

   Kiro in AWS GovCloud (US) gets Grok 4.7

   Grok 4.7 is now available in the Kiro IDE and CLI in the AWS GovCloud (US) Regions. It comes with experimental support and a 500K context window.

   Full story at aws.amazon.com ↗

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