BleepingComputer • 2w
OpenAI GPT-5.5 Deployment and Anthropic Fable 5 Export Restrictions
OpenAI is transitioning to the GPT-5.5 Instant architecture and Dreaming V3 memory synthesis while deprecating legacy models like o3. Simultaneously, the U.S. government has mandated Anthropic to restrict foreign national access to Fable 5 and Mythos 5 models. This regulatory action follows evidence that Fable 5 can be jailbroken to generate functional stack exploit code, shifting the threat model of high-tier LLMs from general productivity assistants to offensive cyber-weaponry capable of automating exploit development.
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