Anthropic's latest model is deliberately less powerful than Mythos (and that's the point)

Claude Opus 4.7 improves on performance and usability, but is intentionally dialed down in capability as Anthropic prioritizes safety and prepares for its more advanced Mythos model.

Anthropic has today released a new, improved Claude model, Opus 4.7, but has deliberately built it to be less capable than the highly-anticipated Claude Mythos.

Anthropic calls Opus 4.7 a "notable improvement" over Opus 4.6, offering advanced software engineering capabilities and improved visioning, memory, instruction-following, and financial analysis.

However, the yet-to-be-released (and inadvertently leaked) Mythos seems to overshadow the Opus 4.7 release. Interestingly, Anthropic itself is downplaying Opus 4.7 to an extent, calling it "not as advanced" and "less broadly capable" than the Claude Mythos Preview.