OpenAI Widens Access to Cybersecurity Model After Anthropic’s Mythos Reveal
infonewsLLM-Specific
industry
Source: SecurityWeekApril 16, 2026
Summary
OpenAI has expanded access to GPT-5.4-Cyber, a specialized AI model trained specifically for cybersecurity defense work, making it easier for legitimate security professionals to use it. This move follows Anthropic's release of their own cybersecurity model called Mythos.
Classification
Attack SophisticationModerate
AI Component TargetedModel
Affected Vendors
OpenAIAnthropic
Related Issues
Monthly digest — independent AI security research
Original source: https://www.securityweek.com/openai-widens-access-to-cybersecurity-model-after-anthropics-mythos-reveal/
First tracked: April 16, 2026 at 02:00 PM
Classified by LLM (prompt v3) · confidence: 85%