# OpenAI GPT-5.5

Type: Product

Source: Legal & RegTech Intelligence Brief — https://getlegalbrief.com/entity/openai-gpt-55
Canonical HTML page: https://getlegalbrief.com/entity/openai-gpt-55

## Timeline

- **2026-06-13**: Anthropic pledges further details — Anthropic states it will share additional information about the jailbreak and the directive within the next 24 hours.
- **2026-06-12T17:21:00-04:00**: Export control directive received — At 5:21 p.m. ET, the U.S. government issues an export control directive ordering Anthropic to suspend all access to Fable 5 and Mythos 5 for any foreign national, including foreign national employees.
- **2026-06-12**: Models disabled — Anthropic abruptly disables Fable 5 and Mythos 5 for all customers to ensure compliance with the directive.
- **2026-06-08**: Announcement of Fable 5 and Mythos 5 — Anthropic publicly unveils Fable 5 and Mythos 5, with Fable 5 marking the first such advanced model made available to the public using new safeguards.
- **2026-04**: Limited release of Claude Mythos Preview — Anthropic releases Claude Mythos Preview with advanced cybersecurity capabilities under a restricted initiative called Project Glasswing, catching the attention of Wall Street and government officials.

## Recent coverage (1 stories)

### US directive forces Anthropic to disable 2 AI models, raising due process alarms
2026-06-13 01:36:31 · Sentiment: Bearish · Impact: 8/10 · Sources: 3

Anthropic’s abrupt disabling of Fable 5 and Mythos 5 under a US export control order lacking detailed justification highlights executive overreach and transparency gaps in AI regulation. Legal experts warn of insufficient statutory process and opaque national security claims.
Full story: https://getlegalbrief.com/story/export-control-anthropic-fable-mythos-due-process

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