METR

Anthropic released Mythos 5.2 and Fable 5.2, claiming gains in coding, reasoning and vision, while cutting Fable input pricing from $10 to $8 per million tokens and speeding responses by 30%. It is the lab's first model launch since a METR report suggested it may be approaching recursive self-improvement, and Fable 5.2 now supports zero data retention for enterprise clients.