Anthropic's latest flagship model version with claimed gains in coding, reasoning and vision.
Anthropic released Fable 5.2 and Mythos 5.2 today, with the llm-anthropic CLI plugin adding immediate support. Hands-on testing shows five reasoning levels from low to max, where xhigh produced the best SVG output while max exhausted 128,000 tokens on reasoning and failed to return an image, reproducing a known bug.
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.