AXIOS (Sam Sabin) - White House quiet on OpenAI's Mythos-like model
OpenAI rolled out a cybersecurity model that rivals the capabilities of Mythos — without nearly as much fanfare or political pushback as Anthropic received. Why it matters: The seemingly straightforward model release raises questions about what actually triggered the Trump administration's concerns about Anthropic's Fable 5 and Mythos 5. Catch up quick: OpenAI debuted an update to GPT-5.5-Cyber on Monday as part of a slew of announcements aimed at deepening its work with cybersecurity companies and researchers. Yes, but: The new GPT-5.5-Cyber achieved an 85.6% score in CyberGym, an internal benchmark that measures whether an AI agent can reproduce known software vulnerabilities. - In comparison, Mythos 5 scored 83.8% on the same…