Anthropic 发布 Mythos 5.2 与 Fable 5.2 模型
原标题：Anthropic releases new Mythos and Fable models amid RSI concerns
AI 摘要
Anthropic 发布 Mythos 5.2 和 Fable 5.2 两款新模型，称在编程、推理和视觉方面有所提升，并将 Fable 的输入价格从每百万 token 10 美元降至 8 美元，响应速度提升 30%，同时支持零数据保留（ZDR）政策。这是 METR 报告暗示 Anthropic 可能接近递归自我改进（RSI）后的首次模型发布，发布说明也承认模型能力测试面临挑战。此外，AI 初创公司 Physical Superintelligence 称使用一个非公开的 Anthropic 模型证明了 Aaronson-Ambainis 猜想，Anthropic 未确认该模型是否为 Fable 5.2。
正文节选
Anthropic released new versions of its most advanced models on Monday, with the launch of Mythos 5.2 and Fable 5.2. The company says the new models “show improvements in areas like coding, reasoning, and vision,” and communicate more clearly with users. Notably, Anthropic is lowering the cost of Fable from $10 to $8 per million input tokens. As a result, Fable 5.2 is now cheaper than its primary competitor GPT-6 Astra. Anthropic says that the new version of Fable will return responses 30% faster