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Anthropic is pushing the boundaries of AI autonomy with the release of Claude Sonnet 4.5. This latest iteration showcases the model’s impressive coding capabilities, demonstrated by its ability to independently develop a chat application comparable to Slack or Microsoft Teams. Over a 30-hour period, Claude Sonnet 4.5 generated roughly 11,000 lines of code, a substantial leap from its predecessor, Opus 4, which ran autonomously for seven hours. With this release, Anthropic aims to establish Claude Sonnet 4.5 as a frontrunner in the fields of AI agents and automated coding solutions.