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OpenAI Counters Mythos with 'GPT 5.5' Rollout
OpenAI distributes GPT 5.5 'Spud' to cybersecurity experts, matching Anthropic's Mythos in exploiting software vulnerabilities with 2 successful simulated cyberattacks out of 10, while taking a more open approach to model deployment as both companies prepare for IPOs and the White House considers new federal oversight measures.