Anthropic says Claude Opus 4 is its most powerful model and the best coding model in the world, while Sonnet 4 is replacing Sonnet 3.7 in the chatbot.

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.

Anthropic has long been warning about these risks—so much so that in 2023, the company pledged to not release certain models until it had developed safety measures capable of constraining them. Now this system,