claude-fable-5-1 · default

{"zh": "Anthropic Claude Fable 5.1(2026-09-01 发布),位于 Opus 之上的前沿档,面向最苛刻的推理与长周期智能体任务。相比 Fable 5,长时间智能体编程、多步研究,以及文档、表格、幻灯片类工作更强;输入输出价格不变,缓存读取降到原来的四分之一(仅为输入价的 2.5%)。100 万 token 上下文、单次最多输出 12.8 万 token,知识截止 2026-06;自适应思考始终开启,默认力度 high。不支持强制指定 tool_choice。", "en": "Anthropic Claude Fable 5.1 (released September 1, 2026), the frontier tier above Opus for the most demanding reasoning and long-horizon agentic work. Compared with Fable 5 it is stronger at long-running agentic coding, multistep research and document, spreadsheet and slide work, at the same input and output prices, with cache reads cut to a quarter (2.5% of the input price). 1M-token context with up to 128K output per response and a June 2026 knowledge cutoff; adaptive thinking is always on with high default effort. Forced tool_choice is not supported."}