Anthropic leaks part of Claude Code's internal source code

Key PointsAnthropic accidentally leaked part of the internal source code for its coding assistant Claude Code, according to a spokesperson. The leak could help give software developers, and Anthropic's competitors, insight into how it built the viral coding tool."No sensitive customer data or credentials were involved or exposed," the spokesperson said.The Anthropic logo appears on a smartphone screen with multiple Claude AI logos in the background. Following the release of Claude Opus 4.6 on February 5, Anthropic continues to challenge its main competitors in the generative AI market in Creteil, France, on February 6, 2026. Samuel Boivin | Nurphoto | Getty ImagesAnthropic leaked part of the internal source code for its popular artificial intelligence coding assistant, Claude Code, the company confirmed on Tuesday."No sensitive customer data or credentials were involved or exposed," an Anthropic spokesperson said in a statement. "This was a release packaging issue caused by human error, not a security breach. We're rolling out measures to prevent this from happening again."A source code leak is a blow to the startup, as it could help give software developers, and Anthropic's competitors, insight into how it built its viral coding tool. A post on X with a link to Anthropic's code has amassed more than 21 million views since it was shared at 4:23 a.m. ET on Tuesday. The leak also marks Anthropic's second major data blunder in under a week. Descriptions of Anthropic's upcomin...