Claude 4

Today, we’re introducing the next generation of Claude models: Claude Opus 4 and Claude Sonnet 4, setting new standards for coding, advanced reasoning, and AI agents. Claude Opus 4 is the world’s best coding model, with sustained performance on complex, long-running tasks and agent workflows. Claude Sonnet 4 is a significant upgrade to Claude Sonnet 3.7, delivering superior coding and reasoning while responding more precisely to your instructions. Alongside the models, we're also announcing: Extended thinking with tool use (beta) : Both models can use tools—like web search—during extended thinking, allowing Claude to alternate between reasoning and tool use to improve responses. : Both models can use tools—like web search—during extended thinking, allowing Claude to alternate between reasoning and tool use to improve responses. New model capabilities : Both models can use tools in parallel, follow instructions more precisely, and—when given access to local files by developers—demon ... Read full article.