Anthropic is working on a system to prove AI models’ identity

Anthropic is developing an open-source system called FlashProve that provides cryptographic "provable inference," letting users confirm that an output came from a specific model rather than an impostor. The system requires labs to publish model fingerprints that do not reveal private weights, and is designed to be lightweight enough for local verification. Researchers released a technical specification and open-source code on GitHub, but say the work is ongoing with no plans to deploy it at Anthropic or any other lab.