Latest. Released September 22, 2026.
For long-running agentic coding and knowledge work
Model ID: claude-opus-5-5
Context window: 1M tokens · Max output: 128K tokens · Input pricing: $4 / MTok · Output pricing: $20 / MTok
Announcement · What’s new · Migration guide
概述
Claude Opus 5.5 专为长时间运行的智能体编码和知识工作而构建，定价为每百万输入/输出令牌 $4 / $20 美元。有四项破坏性变更会影响已在 Claude Opus 5 上运行的代码：无法禁用思考、强制工具使用会返回错误、思考块与模型和对话绑定，以及在 Claude API 和 Claude Models on Google Cloud (Google managed) 上不再接受早期的 computer_20251124 计算机使用工具。前三项同样适用于 Claude Fable 5.1。另有一项变更会改变响应结构，但不会导致任何请求失败：工具调用之间的文本以 thinking 块的形式返回，并且在默认 display 设置下其文本为空。如果应用程序将这些文本作为进度更新流式传输给用户，那么在设置能够返回文本的 display 值之前，它在工具调用之间将保持静默。
对比情况
| Model | Context | Max output | Price / MTok | Latency | Thinking | Default effort | Knowledge cutoff |
|---|---|---|---|---|---|---|---|
| Claude Fable 5.1 | 1M | 128K | $10 / $50 | Slower | Adaptive (always on) | high |
Jun 2026 |
| Claude Opus 5.5 (this model) | 1M | 128K | $4 / $20 | Moderate | Adaptive (always on) | medium |
Jun 2026 |
| Claude Sonnet 5.5 | 1M | 128K | $2 / $10 | Fast | Adaptive | high |
Jun 2026 |
| Claude Haiku 5.5 | 1M | 128K | From $0.10 / $0.50 | Fastest | Adaptive | medium |
Jun 2026 |
- Context: 1M tokens is roughly 555k words or 2.5M Unicode characters on the current tokenizer (introduced with Claude Opus 4.7); models before it fit about 750k words in 1M tokens. 200k tokens is roughly 150k words.
- Max output: Synchronous Messages API limit. On the Message Batches API, Claude Opus 5.5, Claude Opus 5, Claude Sonnet 5.5, Claude Sonnet 5, Claude Haiku 5.5, Claude Opus 4.8, Claude Opus 4.7, Claude Opus 4.6, and Claude Sonnet 4.6 support up to 300k output tokens with the output-300k-2026-03-24 beta header.
- Price / MTok: Input / output, base price per million tokens. Batch API requests are 50% off; prompt caching reads cost 10% of the base input price (2.5% on Claude Fable 5.1 and Claude Mythos 5.1, 5% on Claude Opus 5.5 and Claude Sonnet 5.5). See Pricing for the full list.
- Latency: Comparative latency, relative to the current lineup, as published in the models overview. Actual latency depends on prompt length, output length, and thinking effort.
- Thinking: Adaptive thinking lets the model decide how much to think, steered by effort. Extended thinking is the manual budget_tokens mode on earlier models.
- Default effort: The effort parameter’s default on the Claude API. Models without a value don’t support the parameter.
- Knowledge cutoff: Reliable knowledge cutoff: the date through which the model’s knowledge is most extensive and reliable.
规格
Model IDs
| Platform | Model ID |
|---|---|
| Claude API | claude-opus-5-5 |
| Amazon Bedrock | anthropic.claude-opus-5-5 |
| Claude Models on Google Cloud (Google managed) | claude-opus-5-5 |
| Microsoft Foundry | claude-opus-5-5 |
| Claude Platform on AWS | claude-opus-5-5 |
| Claude Models on Google Cloud (Anthropic managed) | claude-opus-5-5 |
Pricing
| Feature | Value |
|---|---|
| Input | $4 / MTok |
| Output | $20 / MTok |
| 5m cache write | $5 / MTok |
| 1h cache write | $8 / MTok |
| Cache read | $0.20 / MTok |
| Batch API | 50% discount on input and output |
Capabilities
| Feature | Value |
|---|---|
| Context window | 1M tokens |
| Max output | 128K tokens |
| Max output (Batch API, beta) | 300K tokens |
| Thinking | Adaptive (always on) |
| Default effort | medium |
| Comparative latency | Moderate |
| Input → output | Text and images → text |
| Reliable knowledge cutoff | Jun 2026 |
| Training data cutoff | Jun 2026 |
Availability
| Feature | Value |
|---|---|
| Status | Active (latest) |
| Released | September 22, 2026 |
| Retirement | Not sooner than September 22, 2027 |
| Platforms | Claude API, Amazon Bedrock, Claude Models on Google Cloud (Google managed), Microsoft Foundry, Claude Platform on AWS, Claude Models on Google Cloud (Anthropic managed) |
须知事项
- “Adaptive thinking”（自适应思考）始终开启，且无法关闭。您可以使用 effort 参数控制思考深度。
- 在 Message Batches API 上，使用
output-300k-2026-03-24beta 标头时，Claude Opus 5.5 最多支持 300k 个输出令牌。 - 最小可缓存提示长度为 512 个令牌。请参阅提示缓存。
- 使用 Models API 以编程方式查询限制和功能。
资源
-
为 Claude Opus 5.5 编写提示：Claude Opus 5.5 特有的行为差异和提示模式。
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Effort：用于控制思考深度、延迟和成本。为每种工作负载选择合适的级别。
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自适应思考：自适应思考的工作原理以及思考块的保留方式。
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快速模式：Claude API 上更低延迟的 Claude Opus 5.5，单独定价。
参考
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系统提示：Claude Opus 5.5 在 claude.ai 和 Claude 应用中使用的系统提示。
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系统卡：Claude Opus 5.5 的安全评估和部署决策。
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定价：完整价目表，包括批处理折扣和提示缓存费率。
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模型 ID 与版本管理：模型 ID、别名和固定快照的工作方式。
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模型弃用：每个 Claude 模型的生命周期状态和退役承诺。