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Claude Sonnet 4 now supports 1M tokens of context


Claude Sonnet 4 now supports up to 1 million tokens of context on the Anthropic API—a 5x increase.

Claude Sonnet 4 now supports up to 1 million tokens of context on the Anthropic API—a 5x increase that lets you process entire codebases with over 75,000 lines of code or dozens of research papers in a single request. With the 1M context window, developers can now work on significantly larger projects while maintaining the high accuracy we need for real-world coding," said Eric Simons, CEO and Co-founder of Bolt.new. This leap unlocks true production-scale engineering—multi-day sessions on real-world codebases—establishing a new paradigm in agentic software engineering," said Sean Ward, CEO and Co-founder of iGent AI.

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