White House quiet on OpenAI's Mythos-like model

OpenAI released an update to its GPT-5.5-Cyber model with capabilities that rival Anthropic's Mythos model, according to the company. The update was announced on June 23, 2026. However, the White House has not issued any restrictions or public statements regarding the new model, in contrast to its earlier actions against Anthropic's Mythos, which led to export control directives.

The administration's silence on OpenAI's similar capabilities has not been explained. OpenAI's GPT-5.5-Cyber update includes enhanced capabilities for cybersecurity tasks, the company stated.

The lack of a clear policy framework for evaluating AI model risks has been a point of contention. The different treatment of Anthropic and OpenAI highlights the absence of standardised regulatory thresholds.