Claude Fable/Mythos 5.1 发布：缓存降价但成本上升
原标题：[AINews] Claude Fable/Mythos 5.1: new SOTA model, 75% cache price cut but 70% more output tokens
AI 摘要
Anthropic 发布了 Claude Fable 5.1 和 Mythos 5.1，定位为编码和知识工作的新旗舰模型，宣称在多项基准上达到 SOTA。缓存读取价格下调 75%，但输出 token 使用量增加约 1.7 倍，导致单任务成本上升 20%。社区分析认为两个模型可能共享权重，仅安全策略不同。
正文节选
With Astra clearly finally warming up for a full launch (with @sama and @openai writing about it again after a month of self imposed pacing), there’s a familiar window to take the narrative with the round robin of model launches, with Grok 4.7 and Gemini Flash 3.8 also on the way. But that’s also perhaps not the best way to frame today’s launch… which got well over 12M views updating the sitting world best model yet again: The benchmark table speaks for itself: While per-token pricing is the sam