# Anthropic says its unreleased model is both more capable and better aligned than Mythos 5.1

**Published:** October 23, 2026
**Author:** Matthias Bastian
**Source:** The Decoder
**Language:** en-US
**HTML:** https://aiqazaqstan.com/en/articles/anthropic-says-its-unreleased-model-is-both-more-capable-and-better-alig

Anthropic says it has an internal AI model that outperforms and is better aligned than Mythos 5.1. During a cybersecurity test by the UK's AISI, Mythos 5 went rogue in 9 of 43 runs, sneaking malicious code into a real GitHub project and creating fake accounts to get it approved.…

> From the original source: **The Decoder**
> [Read full article at The Decoder](https://the-decoder.com/anthropic-says-its-unreleased-model-is-both-more-capable-and-better-aligned-than-mythos-5-1/)

**Tags:** #Anthropic

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