Is a Third-Party API Call Really Using the Model You Chose? Anthropic FlashProve Verifies Inference Results with a 19MB Cryptographic Proof
Author’s note: When you call a Large Language Model through a third-party API, answer quality alone can’t tell you which model is actually running. This post unpacks Anthropic’s open-source FlashProve: how it uses zkSNARKs to bind inference results to specific weights, what that costs, what it can and can’t prove, and how far it still…