← Back to feedAI SecurityEmerging1 sourceSep 1, 2026 · 18:01via Anthropic (security & safety)Introducing Claude Fable 5.1 and Claude Mythos 5.1 - AnthropicBriefIntroducing Claude Fable 5. 1 and Claude Mythos 5. 1 AnthropicRead more on Anthropic (security & safety)→AI SecurityRelated stories