# Claude Mythos 5.5

Claude Mythos 5.5 · Not on the active radar. A release or rename under this name is not confirmed.

- Developer: Anthropic
- Id: claude-mythos-5-5
- Reported: 2026-11-01T16:09:12.636Z
- Status: Reported
- Not on the active radar. A release or rename under this name is not confirmed.
- Canonical: https://alexgetman.com/models/anthropic/claude-mythos-5-5/

## Questions

### When was Claude Mythos 5.5 released?

Release date unknown

## Timeline

- 2026-11-01T16:09:12.636Z · [Alex Getman](https://alexgetman.com/549/claude-mythos-5-5-has-been-spotted-on-anthropic-s-official-website/)
> Claude Mythos 5.5 has been spotted on Anthropic’s official website
> 
> It’s mentioned four times in the page’s code, and it looks like the release is coming soon, with Fable 5.5 following shortly after.

## Evidence links

- [editorial](https://alexgetman.com/549/claude-mythos-5-5-has-been-spotted-on-anthropic-s-official-website/)
- [anthropic-articles](https://www.anthropic.com/claude-fable-and-mythos-5-2)

## Signals