Anthropic announced two new models, Claude 4 Opus and Claude Sonnet 4, during its first developer conference in San Francisco on Thursday. Claude 4 Opus will be immediately available to paying Claude subscribers, while Claude Sonnet 4 will be available to free and paid users.
The new models, which jump the naming convention from 3.7 straight to 4, have a number of strengths, including their ability to reason, plan, and remember the context of conversations over extended periods of time, the company says. Claude 4 Opus is also even better at playing Pokémon than its predecessor.
“It was able to work agentically on Pokémon for 24 hours,” says Anthropic’s chief product
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