Mythos

Every AIbrief event involving Mythos, in order.

1. June 30, 2026 · Policy · Developing over 22 days · 2 sources

   Trump administration lifts export controls on Anthropic's Mythos and Fable AI models

   Wired reports that the Trump administration is easing or lifting export restrictions on Anthropic's advanced Mythos and Fable AI models. The move follows a prior order that had suspended access for foreign nationals, marking a policy reversal affecting how Anthropic can make the models available internationally.

2. June 22, 2026 · Safety · 1 source

   OpenAI unveils GPT-5.5-Cyber update and launches Patch the Planet bug-fixing initiative

   Wired reports that OpenAI has introduced an updated cyber-focused model, GPT-5.5-Cyber, and a related initiative called Patch the Planet aimed at helping fix bugs in open-source software. The announcement comes amid heightened attention to the cybersecurity capabilities and risks of advanced AI systems, and is framed in part against Anthropic's cyber-oriented Mythos offering.