6h ago

Anthropic prepares claude-mythos-1-preview model for initial use in Claude Code and Claude Security tools ahead of broader Mythos-class releases

Model briefly appeared as Mythos 1 Extended in Claude interface.

——0——
Original post
OPAndrew Curran#517Andrew Curran@ANDREWCURRAN_

Looks like they meant it.

4:09 PM · May 23, 2026 View on X
QUOTE POSTChubby♨️#1496Chubby♨️@KIMMONISMUS

OpenAI: carefully rolls out GPT-5.5-Cyber through Trusted Access for verified defenders

Anthropic: “Claude Mythos is too powerful for public release”

Also Anthropic: accidentally shows Mythos in the UI and immediately runs out of capacity

2026 AI launches are absolut cinema.

Anyways: Mythos incoming?

11:19 PM · May 23, 2026 · 65.2K Views