Anthropic Unveils FlashProve for Proving Which Model Answered You
FlashProve is an Apache-licensed research prototype from Anthropic's Frontier Red Team that proves an AI response came from specific model weights, using hash-based STARK-family proofs. On Llama 4 Maverick (400B parameters) it runs at about 110 tokens per second on one H100, with 19 MB proofs checked on a CPU in 17 to 21 seconds. Proving costs 70 to 95 times normal inference GPU time, context is capped at 1,024 tokens, and Anthropic is not maintaining the repo.
inference, researchΒ· Published and added 3 Nov 2026
















































































































































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