Charting Claude’s progress with Sonnet 4.5

Sonnet 4.5 is the best model in the world for coding and using computers, and the strongest for building complex agents. But don't just take our word for it—watch Claude’s progress over time. We put our models to the test and asked them to clone Claude.ai. Only Sonnet 4.5 was up to the task. Learn more: https://www.anthropic.com/news/claude-sonnet-4-5