AI Security Institute: Anthropic
(asked on 19th October 2026) - View Source
Question to the Cabinet Office:
To ask the Minister for the Cabinet Office, what restrictions applied to the access to Claude Mythos 5.1 that Anthropic offered to the AI Security Institute before that model's release.
Answered by
Kanishka Narayan
Minister of State (Cabinet Office) (Jointly with the Department for Business, Innovation, Science and Technology)
This question was answered on 28th October 2026
The AI Security Institute cannot comment on the specific agreements it has in place with AI developers for commercial and legal reasons. Anthropic made clear at the time of the release of Mythos 5.1 that only limited US organisations had access to this model. Anthropic has since provided the AI Security Institute with unrestricted access.