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Anthropic’s new Claude 4 AI models can reason over many steps


During its inaugural developer conference, Anthropic launched two new AI models the startup claims are among the industry's best, at least in terms of how they score on popular benchmarks.

During its inaugural developer conference Thursday, Anthropic launched two new AI models that the startup claims are among the industry’s best, at least in terms of how they score on popular benchmarks. The company claims its internal testing found that Opus 4 may “substantially increase” the ability of someone with a STEM background to obtain, produce, or deploy chemical, biological, or nuclear weapons, reaching Anthropic’s “ASL-3” model specification. “We’re […] shifting to more frequent model updates, delivering a steady stream of improvements that bring breakthrough capabilities to customers faster,” wrote the startup in its draft post.

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