One of the few places that has access to Claude Mythos preview is Vertex on Google Cloud.

Is Mythos model is not generally available and is only accessible to select individuals at companies like Amazon, Google, Apple, and the US government.

Anthropic's Claude Mythos model is a much bigger, more expensive, slower, but more powerful model compared to Opus.

The Claude Mythos preview has been officially announced, and its system card has been made available.

Anthropic will not widely release its Claude Mythos Preview model because of its potential to cause harm if misused.

In early internal use, Claude Mythos preview reached unprecedented levels of reliability and alignment, leading to broader use with less frequent human interaction than prior models.