Hayden Field / The Verge:Anthropic says Claude Sonnet 4.5 spent 30 hours running autonomously, writing 11,000 lines of code to build a chat app akin to Slack or Teams — It can run autonomously for 30 hours straight, per Anthropic. — Anthropic's latest AI model spent 30 hours running by itself to code a chat app akin to Slack or Teams.