Models
September 30, 2025

Anthropic's Claude Sonnet 4.5 can code autonomously for 30+ hours

Claude Sonnet 4.5, Anthropic’s latest AI, autonomously codes for over 30 hours, producing extensive scripts and applications, showcasing enhanced reasoning and reliability for long-running coding and complex business tasks.

Anthropic introduced Claude Sonnet 4.5, an AI coding model capable of working continuously for more than 30 hours. The model can generate complex applications, producing over 11,000 lines of code, while maintaining high reasoning accuracy and computational efficiency.

The update includes a refined Claude Code interface, improving usability for enterprise developers and project teams.

This autonomous coding capability positions Anthropic to lead in long-task AI applications and reinforces its differentiation in the competitive generative AI market, emphasizing both productivity and sustained performance in coding, mathematical problem-solving, and real-world deployment scenarios.

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