# Executive Order (June 2026)

Type: regulation

Source: Cyber Intelligence Brief — https://getcyberbrief.com/entity/executive-order-june-2026
Canonical HTML page: https://getcyberbrief.com/entity/executive-order-june-2026

## Timeline

- **2026-06-26**: Access Restricted and Partially Lifted — OpenAI limits GPT-5.6 Sol to administration-approved customers; Anthropic announces government has approved limited release of Mythos 5 to cyber defenders and infrastructure providers.
- **2026-06-12**: Models Banned — In compliance with a government directive restricting foreign national access, Anthropic withdraws Fable 5 and Mythos 5, effectively banning their use.
- **2026-06**: Executive Order Signed — President Trump signs executive order establishing a 30-day national security review framework for advanced AI models prior to public release.
- **2026**: Anthropic Warns of Mythos Capabilities — Anthropic informs authorities that its Mythos model is highly effective at identifying software vulnerabilities exploitable by malicious actors.

## Recent coverage (1 stories)

### Anthropic's Mythos 5 Cleared for Cyber Defenders After 2-Week Ban
2026-07-06 01:14:18 · Sentiment: Negative · Impact: 7/10 · Sources: 24

Anthropic's cybersecurity-focused Mythos 5 model, previously banned by the Trump administration, has been approved for limited release to cyber defenders and infrastructure providers. The move highlights the dual-use nature of AI in cybersecurity.
Full story: https://getcyberbrief.com/story/anthropic-mythos-5-cyber-defenders-ban-lifted

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