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Claude Mythos 5.1

Claude Mythos 5.1 is an SI model from Anthropic. The Containment Board lists it as a flagship model of Anthropic, which gets B+ overall.

Developer
Anthropic
Type
SI model
Rogue Log cases
0
Lab grade
B+

What the sources document

This entry only states what the sources on enterrsi.si document. Release dates, sizes and other specifications are left out unless a source here gives them.

Grade context

The Containment Board grades labs, not single models. Anthropic gets B+ overall, rank 1 of 11, on the commitments that decide whether its models can be tested, contained and stopped. See the full report card.

  • Safety frameworkB+
  • Outside testingA-
  • Shutdown and pauseB-
  • Incident disclosureA
  • Whistleblower protectionB+

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