---
title: "“A successful attack could be catastrophic”: Anthropic gives more groups access to Claude Mythos"
url: https://daily.dev/posts/a-successful-attack-could-be-catastrophic-anthropic-gives-more-groups-access-to-claude-mythos-c5rinn0vq
source_url: https://thenewstack.io/anthropic-glasswing-mythos-cybersecurity
type: article
source: "The New Stack"
published: 2026-06-02T18:54:46.273Z
updated: 2026-06-02T18:55:11.545Z
tags: ["security", "cyber", "claude", "anthropic", "ai-security"]
reading_time: 7
upvotes: 0
comments: 0
language: en
---

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# “A successful attack could be catastrophic”: Anthropic gives more groups access to Claude Mythos

**[The New Stack](https://daily.dev/sources/newstack)** · 7 min read · 0 upvotes · 0 comments

## Summary

Anthropic is expanding Project Glasswing, adding approximately 150 new partner organizations across 15 countries to gain access to Claude Mythos Preview, an advanced AI model more powerful than the public Opus family. The model has already identified over 10,000 high- or critical-severity vulnerabilities across major operating systems and browsers. New partners span critical infrastructure sectors including power, water, healthcare, and communications. Anthropic warns that Mythos-class models will likely proliferate to other AI companies within 6–12 months, potentially without safety guardrails. Critics, including the CEO of Strike Graph, raise concerns about the program's lack of independent third-party validation, arguing that Anthropic selectively controls which findings are reviewed. OpenAI is running a parallel initiative called GPT-5.5-Cyber under its Trusted Access for Cyber program.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://thenewstack.io/anthropic-glasswing-mythos-cybersecurity>

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Tags: [#security](https://daily.dev/tags/security), [#cyber](https://daily.dev/tags/cyber), [#claude](https://daily.dev/tags/claude), [#anthropic](https://daily.dev/tags/anthropic), [#ai-security](https://daily.dev/tags/ai-security)

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