当前模型与定价
这是 AILmanac 中唯一带有严格时效性保证的页面。站点上其他地方涉及的每一项模型信息都会链接到这里，而不是硬编码名称或数字，因此只需在一个地方保持更新即可。
当前的 Claude 模型
Last verified: 2026-09-14 · Official models & pricing
| Model | API model ID | Tier | Best for |
|---|---|---|---|
| Claude Fable 5.1 | claude-fable-5-1 | Mythos-class — flagship (above Opus) | Anthropic's most capable widely released model, released September 1, 2026. For demanding reasoning and long-horizon agentic work, or when Opus 5 at higher effort still falls short on your evals. Same list price as Fable 5 with cache reads at a quarter of the cost. Three breaking changes vs Fable 5: forced tool_choice (any/tool) returns 400, thinking blocks are readable only by Fable 5.1 or newer, and editing earlier turns invalidates thinking blocks. Refuses in-band (HTTP 200, stop_reason: refusal); fallback targets are Opus 5 and Opus 4.8. 30-day retention (NOT ZDR-eligible); not on Priority Tier. (Supersedes Claude Fable 5, now a legacy model.) |
| Claude Mythos 5.1 | claude-mythos-5-1 | Mythos-class — restricted (Project Glasswing) | Same underlying model, specs and pricing as Fable 5.1 with a different safeguard configuration, offered only to approved Project Glasswing participants (currently US organizations, via the Cyber Verification and Life Sciences Verification programs). Does not run the conversation-binding check on thinking blocks. Customers without access should use Fable 5.1. |
| Claude Opus 5 | claude-opus-5 | Opus — most capable | Complex agentic coding and enterprise work: 1M context, 128k output, with materially better numbers than Opus 4.8. Default on Claude Max, strongest available on Claude Pro. (Supersedes Claude Opus 4.8, now a legacy model.) |
| Claude Sonnet 5 | claude-sonnet-5 | Sonnet — balanced | The default workhorse and Claude Code's default model: the best combination of speed and intelligence, with a 1M-token context window. Start here for most work. (Supersedes Claude Sonnet 4.6, now a legacy model.) |
| Claude Haiku 4.5 | claude-haiku-4-5-20251001 | Haiku — fastest & cheapest | High-volume, latency-sensitive tasks: classification, extraction, routing, simple chat, and cheap sub-agents. |
| Claude Fable 5 | claude-fable-5 | Mythos-class — flagship (above Opus) | Legacy since September 1, 2026 (superseded by Fable 5.1) but still available. Multiday autonomous runs, first-shot on ambiguous specs, dense vision, sustained delegation to parallel subagents. GA June 9 2026. Refuses in-band (HTTP 200, stop_reason: refusal) — configure server-side or client-side fallback. Adaptive thinking only; raw thinking never returned. 30-day retention (NOT ZDR-eligible). Two reasons to stay on it for now: it supports forced tool_choice and Priority Tier, which Fable 5.1 does not. |
| Claude Mythos 5 | claude-mythos-5 | Mythos-class — restricted (Project Glasswing), legacy | Superseded by Mythos 5.1. Shares Fable 5's specs and pricing, offered separately for defensive cybersecurity workflows in Project Glasswing. Invitation-only, no self-serve sign-up. Customers without access should use Fable 5.1. |
Model IDs are exact; tiers and 'best for' are guidance. Pricing, context-window sizes and rate limits change frequently and are intentionally NOT listed here — always read them on the official page above. This file is the single source of truth: never hard-code model facts in prose, link to this table instead.
为什么定价和上下文限制不在表格中
它们变动得太频繁，无法安全地复制——过时的价格比没有价格更糟。我们只列出每个模型的标识信息（名称、API ID、用途），并将你引导至官方页面查看 定价、上下文窗口和速率限制，那里始终是权威来源。
我们如何保持其时效性
- 该表格由单一数据文件（
data/models.json）渲染而成，该文件携带 “最后验证”日期。 - 更新它只需改动一行——是一次绝佳的 首次贡献。
- 在后续阶段，自动化将把该文件与官方模型接口进行比对，并在出现差异时自动提交一个 pull request——但在发布之前始终会有人工审核。（参阅 我们的自动化如何运作。）
如何在它们之间做选择
一条快速的经验法则（完整指导见 选择模型）：
- 从 Sonnet 开始。 对大多数工作而言，它在质量、速度和成本之间达到了最佳平衡。
- 当难题上的质量比成本更重要时，选用 Opus。
- 对于高并发、对延迟敏感或简单的任务，降级到 Haiku。