Claude Fable 5.1Claude Fable 5.1（Anthropic）
Anthropic 2026-09-01 发布的现役 Fable 档（Mythos 级）旗舰：与 Mythos 5.1 共享底层权重，仅安全护栏更严。1M 上下文、128K 最大输出，定价维持 $10/$50 每百万 tokens，但缓存读从 $1 降至 $0.25（降 75%），官方测算典型负载便宜约 25%、高度智能体化负载最高省 45%。Terminal-Bench-Science 0.1 由上代 24.7% 跃升至 52.6%，Terminal-Bench 4.0 达 55.8%。新增对话中逐条调节推理强度、内容溯源追踪与隐形水印。Anthropic's current Fable-tier (Mythos-class) flagship, released 2026-09-01, sharing weights with Mythos 5.1 under stricter safeguards. 1M context, 128K max output, priced at $10/$50 per million tokens, with cache reads cut from $1 to $0.25 (-75%): Anthropic estimates ~25% lower cost on typical workloads and up to 45% on heavily agentic ones. Terminal-Bench-Science 0.1 jumps from 24.7% to 52.6%; Terminal-Bench 4.0 reaches 55.8%. Adds mid-conversation effort control, content provenance tracking and invisible watermarking.
模型参数与规格Specifications
| 厂商 | Anthropic |
| 类型 | 对话大模型 |
| 参数规模 | 未公开 |
| 开源/闭源 | 闭源 |
| 架构 | 未公开 |
| 上下文窗口 | 1M |
| 最大输出 | 128K |
| 输入价格 | $10/M tokens |
| 输出价格 | $50/M tokens |
| 语言 | 多语言 |
| 发布时间 | 2026-09 |
| 评分 | 4.9 / 5 |
| 能力 | chat、vision、reasoning、functionchat、vision、reasoning、function |
| 标签 | 对话、推理、长上下文、智能体Chat、Reasoning、Long-context、Agent |
| 优点 | 长时智能体最强档（Science 52.6%）、缓存降价 75% 至 $0.25、1M 上下文 + 可中途调推理强度Best-in-class long-horizon agents (Science 52.6%)、Cache reads cut 75% to $0.25、1M context with mid-conversation effort control |
| 注意事项 | 闭源、全站最高价档之一、基准多为官方自测，待第三方复现Closed-source、Among the most expensive tiers on this site、Mostly self-reported benchmarks, pending third-party replication |
打开微信「扫一扫」，分享给好友或朋友圈
关闭关于 Claude Fable 5.1 的常见问题Frequently Asked Questions about Claude Fable 5.1
Claude Fable 5.1 是免费的吗？Is Claude Fable 5.1 free?
Claude Fable 5.1 目前以付费 API / 平台调用为主，可关注官方是否提供免费试用额度。Claude Fable 5.1 is mainly available via paid API/platform calls; watch for official free trial quotas.
Claude Fable 5.1 的上下文窗口有多大？How large is Claude Fable 5.1's context window?
Claude Fable 5.1 的上下文窗口为 1M，适合处理长文档与多轮复杂对话。Claude Fable 5.1's context window is 1M, suitable for long documents and multi-turn complex dialogue.
Claude Fable 5.1 是开源还是闭源？Is Claude Fable 5.1 open-source or closed-source?
闭源模型，主要通过官方 API 或平台使用。Closed-source model, mainly available via official API or platform.
Claude Fable 5.1 适合用来做什么？What is Claude Fable 5.1 good for?
Claude Fable 5.1 的主要能力包括 chat、vision、reasoning、function，可用于相关场景的创作、分析与自动化任务。Claude Fable 5.1's main capabilities include chat、vision、reasoning、function, usable for creation, analysis and automation in related scenarios.