Opus 4.7 comes on the heels of Mythos Preview, the buzzy cybersecurity-focused model Anthropic announced earlier this month, which the company has said is its most powerful model overall. Comparatively, Opus 4.7 is much more limited. In Opus 4.7’s system card, Anthropic wrote that Opus 4.7 doesn’t even advance the company’s “capability frontier,” since Claude Mythos Preview received higher results “on every relevant evaluation.”

For security reasons, Anthropic is only currently making Mythos Preview available privately to select partners, such as Nvidia, JPMorgan Chase, Google, Apple, and Microsoft. “We stated that we would keep Claude Mythos Preview’s release limited and test new cyber safeguards on less capable models first,” Anthropic wrote in a blog post. “Opus 4.7 is the first such model: its cyber capabilities are not as advanced as those of Mythos Preview (indeed, during its training we experimented with efforts to differentially reduce these capabilities).”

The company said it’s releasing the new model with additional cybersecurity safeguards compared to Opus 4.6 and that findings from the deployment of those safeguards “will help us work towards our eventual goal of a broad release of Mythos-class models.”

The company added that security professionals wishing to use the model for cybersecurity purposes, like vulnerability research, could join its new Cyber Verification Program, which ostensibly would let up on some of the safeguards Anthropic introduced for Opus 4.7.