> "Claude Mythos Preview’s large increase in capabilities has led us to decide not to make it generally available. Instead, we are using it as part of a defensive cybersecurity program with a limited set of partners."

they also don't have the compute, which seems more relevant than its large increase in capabilities

I bet it's also misaligned like GPT 4.1 was

given how these models are created, Mythos was probably cooking ever since then, and doesn't have the learnings or alignment tweaks that models which were released in the last several months have