Anthropic introduces FlashProve to verify whether a response came from a given AI model
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Rohan PaulXPickAnthropic open-sources FlashProve to verify which AI model wrote a replyAIAnthropic has open-sourced FlashProve, a cryptographic system that lets a server prove which AI model produced a given response. The post says it is far more efficient than prior open-source methods, and that a single Nvidia H100 produced proofs for Meta's Llama 4 Maverick at 110 tokens per second, each about 19MB, which a regular CPU checks in about 17 seconds. The author says the proofs could catch resellers serving a cheaper model and let safety evaluators confirm they are testing the model customers receive.
AnthropicOfficialPickAnthropic introduces FlashProve for verifying whether AI responses came from a given modelAIAnthropic has introduced FlashProve, a tool that lets developers verify whether a given response came from a given AI model, building on established cryptographic techniques. The company says it is substantially more efficient than prior open-source methods, and that proofs could make chat hijacking harder and let safety evaluators confirm they are testing the model served to customers. The code is open-sourced on GitHub.