Claude 4 is able to alternate between thinking and tool calls as well, in both claude dot ai and the API. We’ve seen this greatly improve Claude’s performance and tool calling ability.
@alexalbert__
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Opus 4 Redefines AI Agent Capabilities in Production Environments
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Opus 4 also excels at agentic tasks. Combined with our advances in memory training and context handling, it will redefine what AI agents can actually accomplish in production.
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Opus 4 Returns: Advanced Model with Superior Conversational Nuance
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Let's start with Opus 4. It’s finally back and it's better than ever. This model picks up on the subtlest nuances in conversation. Every interaction I’ve had with it feels more natural and intuitive than with any other model I’ve used.
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Sonnet 4: New Workhorse Model with State-of-the-Art Performance
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Now onto Sonnet 4 – our new workhorse. State-of-the-art SWE-Bench Verified score. Dramatically improved function calling. This is a true drop-in replacement for Sonnet 3.5, and you can expect immediate performance gains across the board.
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Introduction of Claude Opus 4 and Claude Sonnet 4 Models
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Introducing Claude Opus 4 and Claude Sonnet 4. Our best models yet. The Claude 4 family is here.
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Code with Claude Event Scheduled for Thursday May 22
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Code with Claude is this Thursday – 5/22 starting at 930am PT Lots of new stuff has been cooking and it all smells goooood, should be a fun one! Will be livestreamed on http://
anthropic.com/events -
CO2 Buildup in Closed Bedroom Causes Morning Drowsiness
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PSA for people who sleep with their door closed I was talking to Claude about waking up drowsy with a stuffy nose at my childhood home Claude suspected CO2 buildup and suggested buying a monitor for my room Turns out Claude was right – the levels spike when I sleep
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Research Now Available on Mobile: Personalized Reports Before Bed
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Research is finally available on mobile. I've gotten into a habit lately of firing off a few Research tasks before I go to bed and waking up to personalized reports to read. Highly recommend – way better than my old morning routine of reading tons of newsletters.
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Danish Education Model: Less Homework, More Collaboration and Projects
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Was chatting with a friend who went to university in Denmark and he was explaining how AI isn't disrupting education there as much as it is in the US. Denmark barely assigns homework. They have longer school days packed with collaborative work, discussions, and projects.
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Claude Code now supports web search API integration
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Yes! Now out for Claude Code as well https://
anthropic.com/news/web-searc
h-api
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