
Anthropic web config hints at Claude Sonnet 4 and Opus 4
Published on May 21, 2025
Anthropic is secretly working on two new models called Claude Sonnet 4 and Opus 4, which are believed to be the company's most advanced AI models. [...]

Anthropic is secretly working on two new models called Claude Sonnet 4 and Opus 4, which are believed to be the company's most advanced AI models. [...]