Foreign States Already Have Claude Fable 5 and GPT 5.6 Sol

Foreign state actors have likely already stolen the weights of Anthropic's Claude Fable 5 and OpenAI's GPT 5.6 Sol, according to a new analysis. The article questions whether CEOs Sam Altman and Dario Amodei can guarantee their frontier model weights have not been exfiltrated, noting that such assurances are impossible to verify.

The default assumption should be that foreign state actors have already exfiltrated the weights of Claude Fable 5 https://platform.claude.com/docs/en/about-claude/models/introducing-claude-fable-5-and-claude-mythos-5 and GPT 5.6 Sol https://openai.com/index/previewing-gpt-5-6-sol/ , the latest frontier models from Anthropic https://www.anthropic.com and OpenAI https://openai.com . Here’s the question I wish a journalist would put to Sam Altman https://x.com/sama and Dario Amodei https://x.com/DarioAmodei on the record: “Can you guarantee that no foreign state actor has exfiltrated, or will exfiltrate, your frontier model weights?” They might say “Our weights have never left our own systems.” But there’s no way they can actually know that.