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Anthropic web config hints at Claude Sonnet 4 and Opus 4

Anthropic is secretly working on new models called Claude Sonnet 4 and Opus 4, which are believed to be the company’s most advanced AI models. This is according to Anthropic web configuration files, which were recently updated with references to Claude Sonnet 4 and Opus 4. As you can see in the above image showing the internal configuration file, Anthropic has specifically mentioned…