All modelsMODEL / FRONTIER COVERAGEOpus 5.5TYPEModelSIGNALS5FIRST SEENSep 25, 2026LAST SEENOct 27, 2026Recent signalsHow Anthropic ships the #1 LLM in the World safely: Separating the Brain from the Hands Oct 27, 2026Artificial Analysis says Kimi K3.1 Pro lands 4th on its Intelligence Index, behind only Opus 5.5 (max), Sonnet 5.5 (max), and Muse Wonder Full (max) (@artificialanlys) Oct 23, 2026Anthropic says new measures like preserved thinking in Fable 5.1 and Opus 5.5 have reduced data harvesting through distillation attacks by about 90% to 99% (Anthropic) Oct 12, 2026Meta’s Muse just stole the AI spotlight from OpenAI and Anthropic Sep 25, 2026Meta’s AI Tamagotchi bet is…working? Sep 25, 2026RELATEDAnthropicMetaOpenAIClaudeMuseGPT-6ChatGPTMuse Wonder FullALL MODELSLATEST SIGNAL