# Zvi Mowshowitz reviews Claude Mythos 5.2's system card and safety findings

> Original title: Fable and Mythos 5.2: The System Card

- Source: Don't Worry About the Vase (Zvi Mowshowitz)
- Published: 2026-11-11T16:25:17.000Z
- Bad Influence: https://badinfluence.news/items/khuktjyg6gcdn3rb69dt87o0f
- Original: https://thezvi.substack.com/p/fable-and-mythos-52-the-system-card

## Summary

Zvi Mowshowitz reviews the Claude Mythos 5.2 system card, focusing on what changed from earlier models. He says Anthropic's AI R&D progress estimate of 1.88x (95% CI: 1.62x-2.28x) cannot rule out the 2x threshold, and he disputes Anthropic's decision not to trigger Autonomy Threat Model 2.