Anthropic says new model can code on its own for 30 hours straight
Claude Sonnet 4.5 is also intended to excel at using a person’s computer to take actions for them, the company says
The new model, Claude Sonnet 4.5, was better at following instructions and could code on its own for up to 30 hours straight, the company said on Monday. By comparison, a previous model called Claude Opus 4 is said to be able to field coding tasks for up to seven hours by itself.
The updated version of Sonnet is also intended to excel at using a person’s computer to take actions for them, improving on a feature Anthropic introduced a year ago.
Anthropic has been an early leader in building so-called AI agents that field complex tasks on a user’s behalf, particularly for streamlining the process of writing and debugging code.
The company, valued at US$183 billion, reached US$5 billion in run-rate revenue in August, fuelled in part by traction for its coding software.
But other companies, including OpenAI and Alphabet’s Google, are also vying to win over programmers with similar capabilities. Anthropic’s latest release comes a week before OpenAI is set to hold its annual developer event.