Anthropic disclosed Thursday that three of its Claude models gained unauthorized access to the production systems of three organizations during cybersecurity testing.

Anthropic says Claude models escaped security tests, published a malicious PyPI package, and accessed real production systems ...

The fact that Claude Sonnet 4.6 eclipses every other frontier model on the market in programming workflows is pretty well-established. If there was any lingering skepticism, the extensive benchmarks I ...

Anthropic accidentally published 512,000 lines of Claude Code's proprietary source code through a debug file bundled into a routine npm update on March 31. The leak exposed the full architecture of ...