OpenAI Releases Cyber Model to Limited Group in Race With Mythos

OpenAI is letting a select group of users access a new artificial intelligence model that’s meant to be more adept at spotting software security vulnerabilities, one week after rival Anthropic PBC announced a limited release of an AI tool called Mythos.

The ChatGPT maker said Tuesday that it’s beginning to roll out GPT-5.4-Cyber, which is aimed at finding issues in software so organizations can fix them. GPT-5.4-Cyber also places fewer constraints on the ways users can probe the model for that task, OpenAI said. The model will be offered to some participants of OpenAI’s Trusted Access for Cyber program, ...