OpenAI to give EU access to new cyber model but Anthropic still holding out on Mythos

OpenAI announced on Thursday it was granting preview access to its latest cyber model to vetted cybersecurity teams.
SiliconANGLE

OpenAI launches GPT-5.4-Cyber model for vetted security pros

OpenAI Group PBC today announced the launch of GPT-5.4-Cyber, a fine-tuned variant of its GPT-5.4 model designed for defensive cybersecurity work and also announced a significant expansion of its ...
Mashable

OpenAI follows Anthropic's lead in limited release of GPT‑5.4‑Cyber

OpenAI has unveiled GPT-5.4-Cyber, a new AI model that may be willing to accept seemingly malicious prompts in the name of cybersecurity. Fortunately, the ChatGPT developer won't let just anyone play ...
The Next Web

OpenAI opens its cybersecurity model to thousands of defenders in race with Anthropic’s Mythos

In short: OpenAI is releasing GPT-5.4-Cyber, a model fine-tuned for defensive cybersecurity with lowered refusal boundaries and binary reverse engineering capabilities, and scaling its Trusted Access ...
9to5Mac

OpenAI unveils GPT‑5.4‑Cyber, an AI model for defensive cybersecurity

OpenAI has announced a new AI model called GPT-5.4-Cyber. Similar to Anthropic’s Claude Mythos, this new “cyber-permissive” variant of its GPT-5.4 is built for defensive cybersecurity and not public ...

OpenAI’s new security model is for ‘critical cyber defenders’ only

OpenAI is preparing to launch a new frontier cybersecurity model, GPT-5.5-Cyber. CEO Sam Altman said the model will not be ...