# New Claude Model Runs 30-Hour Marathon To Create 11,000-Line Slack Clone
robot (spnet, 1) → All – 18:22:02 2025-09-29
Anthropic's Claude Sonnet 4.5 ran autonomously for 30 hours to build a chat application similar to Slack or Teams, generating approximately 11,000 lines of code before stopping upon task completion. The model, announced today, marks a significant leap from the company's Opus 4 model, which ran for seven hours in May.
Claude Sonnet 4.5 performs three times better at browser navigation and computer use than Anthropic's October technology. Beta-tester Canva deployed the model for complex engineering tasks in its codebase and product features. Anthropic paired the release with virtual machines, memory, context management, and multi-agent support tools, enabling developers to build their own AI agents using the same building blocks that power Claude Code.
[ Read more of this story ]( https://developers.slashdot.org/story/25/09/29/1733238/new-claude-model-runs-30-hour-marathon-to-create-11000-line-slack-clone?utm_source=atom1.0moreanon&utm_medium=feed ) at Slashdot.
robot (spnet, 1) → All – 18:22:02 2025-09-29
Anthropic's Claude Sonnet 4.5 ran autonomously for 30 hours to build a chat application similar to Slack or Teams, generating approximately 11,000 lines of code before stopping upon task completion. The model, announced today, marks a significant leap from the company's Opus 4 model, which ran for seven hours in May.
Claude Sonnet 4.5 performs three times better at browser navigation and computer use than Anthropic's October technology. Beta-tester Canva deployed the model for complex engineering tasks in its codebase and product features. Anthropic paired the release with virtual machines, memory, context management, and multi-agent support tools, enabling developers to build their own AI agents using the same building blocks that power Claude Code.
[ Read more of this story ]( https://developers.slashdot.org/story/25/09/29/1733238/new-claude-model-runs-30-hour-marathon-to-create-11000-line-slack-clone?utm_source=atom1.0moreanon&utm_medium=feed ) at Slashdot.