Anthropic has unveiled its new AI model, Claude Sonnet 4.5, which independently ran for 30 hours to develop a chat application similar to Slack or Teams. During this time, it generated approximately 11,000 lines of code. This marks a significant improvement over the company’s previous Opus 4 model, which could operate autonomously for seven hours. Anthropic views Claude Sonnet 4.5 as a major advancement in the competitive landscape of AI agents and coding technology.
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