Anthropic makes Claude Opus 5.5 default on paid plans and tells users to drop old prompting habits
Anthropic made Claude Opus 5.5 the default model on all paid plans and published a prompting guide. It advises dropping phrases like "think hard" and starting at Medium effort.
Users and developers can get faster, better results by updating prompts written for older models.
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Google releases Gemini 4 Hydrogen, now the default model in Search AI Mode
Google launched Gemini 4 Hydrogen, which it says handles multi-part questions, typos and very specific requests better, and it replaces the Flash series. It is available today in Search, the Gemini app, AI Studio, the Gemini API and Gemini for business.
Why it mattersBillions of searches and many developer apps will now run on this model, and independent tests suggest it offers near-top quality for less money than some rivals.
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Google DeepMind unveils AlphaGenome 2 to show how DNA changes affect different cells
Google DeepMind released AlphaGenome 2, the successor to its genome-predicting model. It aims to explain how DNA changes affect different cell types, which could help find causes of disease.
Why it mattersBetter tools for reading DNA effects could speed up research into new treatments.
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Anthropic releases Claude Fable 5.2 and Mythos 5.2, topping a multi-stage cyberattack benchmark
Anthropic released Claude Fable 5.2 and Claude Mythos 5.2, saying both improve on coding, reasoning and vision. Fable 5.2 beat GPT-6 Cyber on a benchmark that tests multi-stage cyberattacks.
Why it mattersStronger frontier models help developers do more, but their growing cyberattack skills raise the stakes for security teams.
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Cursor confirms breach let hackers push a malicious Claude Code extension through its marketplace
Cursor confirmed a security breach that allowed attackers to distribute a malicious Claude Code extension through its marketplace. The attackers used credentials stolen from AI infrastructure provider Fireworks AI.
Why it mattersDevelopers who installed extensions from Cursor's marketplace should check their tools, because one stolen credential can spread through the AI supply chain.
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OpenAI rolls out ChatGPT Wallet so AI agents can buy things without seeing your card number
OpenAI began rolling out ChatGPT Wallet, which lets its agents pay for purchases using a stand-in card number, so card details are not shared with the agent or the merchant. It was built with American Express, Mastercard and Visa, starts with US Pro subscribers, and requires biometric approval for each purchase.
Why it mattersLetting AI agents spend money for you is now a real product, so shoppers and merchants need to understand how approvals, tokenized cards and agent blocking will work.
