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What’s Improved in AI Models Sonnet & Opus

Anthropic’s Claude Opus 4 model can work autonomously for nearly a full workday

Anthropic kicked off its first-ever Code with Claude conference today with the announcement of a new frontier AI system. The company is calling Claude Opus 4 the best coding model in the world. According to Anthropic,

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Anthropic Releases Claude 4: What’s Improved in AI Models Sonnet & Opus

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Anthropic's Claude 4 Models Can Write Complex Code for You

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Anthropic adds Claude 4 security measures to limit risk of users developing weapons

The company said the move is meant "to limit the risk of Claude being misused specifically for the development or acquisition of chemical, biological, radiological, and nuclear (CBRN) weapons."

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Claude 4 AI will try to report you to authorities if it thinks you’re doing shady stuff

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Anthropic’s Promises Its New Claude AI Models Are Less Likely to Try to Deceive You

Anthropic overtakes OpenAI: Claude Opus 4 codes seven hours nonstop, sets record SWE-Bench score and reshapes enterprise AI

Anthropic's Claude Opus 4 outperforms OpenAI's GPT-4.1 with unprecedented seven-hour autonomous coding sessions and record-breaking 72.5% SWE-bench score, transforming AI from quick-response tool to day-long collaborator.

New Claude 4 AI model refactored code for 7 hours straight

In particular, that marathon refactoring claim reportedly comes from Rakuten, a Japanese tech services conglomerate that "validated [Claude's] capabilities with a demanding open-source refactor running independently for 7 hours with sustained performance," Anthropic said in a news release.

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Claude Opus 4 is here — and it might be the smartest AI assistant yet

With top scores in real-world coding benchmarks, Anthropic's new models, Claude Opus 4 and Sonnet 4 are here; here's what they can do.

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Claude 4 Tests the Boundaries of Goal-oriented AI

Anthropic's newest editon of its flagship AI product will address significant limitations in current large language models.

Time Magazine appears to accidentally publish embargoed story confirming new Anthropic model

Someone also appears to have published a full scrape of the Time article online on the news aggregator app Newsbreak.