A Rapidly Rising Bar for Long-Horizon Tasks Anthropic’s new Claude 4.5 Sonnet is not a modest incremental upgrade. Its defining achievement is the ability to run autonomously for about thirty hours and ship an 11 000-line chat application—a feat that would keep a human developer busy for multiple workdays. In the broader timeline of model […] The post Claude 4.5 Sonnet: Autonomous Coding Takes a Quantum Leap appeared first on NATURAL 20.
