The company today revealed that Claude Sonnet 4 now supports up to 1 million tokens of context in the Anthropic API — a five-fold increase over the previous limit.

Dan Shipper in Vibe Check Was this newsletter forwarded to you? Sign up to get it in your inbox. Today, Anthropic is releasing a version of Claude Sonnet 4 that has a 1-million token context window.

Anthropic's popular coding model just became a little more enticing for developers with a million token context window.

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Claude Sonnet 4 can now support up to one million tokens of context, marking a fivefold increase from the prior 200,000, ...

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