Anthropic and OpenAI Models Reach Parity in Offensive Cybersecurity Capabilities
Anthropic’s Mythos and OpenAI’s GPT-5.5 have demonstrated a "game-changing" ability to develop cyber exploits, with researchers noting that both models have reached a level of offensive parity. This leap in capability has already led to the detection of the first AI-written zero-day exploit in the wild, significantly shortening the window between vulnerability discovery and proof of concept. While OpenAI is rolling out a specialized GPT-5.5-Cyber version to vetted teams, some analysts report that both models still suffer from consistent reasoning failures. Meanwhile, the rapid advancement of these tools comes amid political tension in Washington, following a presidential reversal on safety reviews for new AI models.
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AI-assisted exploit development is shortening the time from vulnerability discovery to proof. Learn what the Apple M5 Mythos case really shows, why Web and API validation need evidence-first workflows, and where automation must stay within safe boundaries.
How big tech got its way on Trump’s AI executive order | AI (artificial intelligence) | The Guardian
David Sacks and Mark Zuckerberg attend a dinner with tech leaders at the White House in Washington DC on 4 September 2025. Photograph: Bloomberg/Getty Images ... The US president’s reversal on calling for a safety review of new AI models is a green light for tech’s unchecked power
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