UK committee reveals Anthropic withheld its latest model from AISI, which isn't a regulator

connoraxiotes · x · 2026-09-17

The UK Business, Innovation, Science and Trade Committee has published a response from the AI Security Institute to its 9 September letter, confirming that Anthropic withheld its latest model from the institute. Reposter theobearman stresses that AISI is not a regulator, and that accurate reporting on what AISI is and is not matters — especially from public institutions.

The exchange puts the tension between frontier labs and government evaluation bodies on the public record.

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