---
title: Claude Opus 5.5
url: https://platform.claude.com/docs/zh-TW/models/opus-5-5/overview
description: Claude Opus 5.5 一覽：用途、各平台上的模型 ID、上下文視窗、輸出限制、定價、可用性，以及使用它進行建構的指南與資源。
---
**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](https://www.anthropic.com/claude-opus-5-5) · [What’s new](https://platform.claude.com/docs/zh-TW/models/opus-5-5/whats-new-opus-5-5) · [Migration guide](https://platform.claude.com/docs/zh-TW/models/opus-5-5/migration-guide)
## 概覽
Claude Opus 5.5 專為長時間執行的「agentic coding」（代理式程式設計）與知識工作而打造，定價為每百萬輸入／輸出 token $4 / $20 美元。有四項「breaking changes」（重大變更）會影響已在 Claude Opus 5 上執行的程式碼：[思考無法停用](https://platform.claude.com/docs/zh-TW/models/opus-5-5/whats-new-opus-5-5#thinking-cant-be-disabled)、[強制工具使用會傳回錯誤](https://platform.claude.com/docs/zh-TW/models/opus-5-5/whats-new-opus-5-5#forced-tool-use-is-not-supported)、[思考區塊與模型及對話綁定](https://platform.claude.com/docs/zh-TW/models/opus-5-5/whats-new-opus-5-5#thinking-blocks-are-tied-to-the-model-that-produced-them)，以及在 Claude API 與 Google Cloud 上，[不再接受較早的 `computer_20251124` 電腦使用工具](https://platform.claude.com/docs/zh-TW/models/opus-5-5/whats-new-opus-5-5#computer-20251124-is-not-supported)。前三項同樣適用於 Claude Fable 5.1。另一項變更會改變回應的結構，但不會導致任何請求失敗：[工具呼叫之間的文字會以 `thinking` 區塊傳回](https://platform.claude.com/docs/zh-TW/models/opus-5-5/whats-new-opus-5-5#text-between-tool-calls)，且在預設的 `display` 設定下，這些區塊的文字為空。若應用程式會將這些文字作為進度更新串流給使用者，則在設定會傳回文字的 `display` 值之前，工具呼叫之間將不會有任何輸出。
[Claude Opus 5.5 的新功能](https://platform.claude.com/docs/zh-TW/models/opus-5-5/whats-new-opus-5-5)
## 比較
| Model | Context | Max output | Price / MTok | Latency | Thinking | Default effort | Knowledge cutoff |
| :------------------------------------------------------------------------------------- | :------ | :--------- | :----------------- | :------- | :------------------- | :------------- | :--------------- |
| [Claude Fable 5.1](https://platform.claude.com/docs/zh-TW/models/fable-5-1/overview) | 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](https://platform.claude.com/docs/zh-TW/models/sonnet-5-5/overview) | 1M | 128K | $2 / $10 | Fast | Adaptive | `high` | Jun 2026 |
| [Claude Haiku 5.5](https://platform.claude.com/docs/zh-TW/models/haiku-5-5/overview) | 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.
## 規格
### Model IDs
| Platform | Model ID |
| :-------------------------------------------------------------------------------------------------------- | :-------------------------- |
| Claude API | `claude-opus-5-5` |
| [Amazon Bedrock](https://platform.claude.com/docs/zh-TW/build-with-claude/claude-in-amazon-bedrock) | `anthropic.claude-opus-5-5` |
| [Google Cloud](https://platform.claude.com/docs/zh-TW/build-with-claude/claude-on-vertex-ai) | `claude-opus-5-5` |
| [Microsoft Foundry](https://platform.claude.com/docs/zh-TW/build-with-claude/claude-in-microsoft-foundry) | `claude-opus-5-5` |
| [Claude Platform on AWS](https://platform.claude.com/docs/zh-TW/build-with-claude/claude-platform-on-aws) | `claude-opus-5-5` |
### Pricing
| Feature | Value |
| :---------------------------------------------------------------------------------------- | :------------------------------- |
| Input | $4 / MTok |
| Output | $20 / MTok |
| [5m cache write](https://platform.claude.com/docs/zh-TW/build-with-claude/prompt-caching) | $5 / MTok |
| [1h cache write](https://platform.claude.com/docs/zh-TW/build-with-claude/prompt-caching) | $8 / MTok |
| [Cache read](https://platform.claude.com/docs/zh-TW/build-with-claude/prompt-caching) | $0.20 / MTok |
| [Batch API](https://platform.claude.com/docs/zh-TW/build-with-claude/batch-processing) | 50% discount on input and output |
[Full price list](https://platform.claude.com/docs/zh-TW/about-claude/pricing)
### Capabilities
| Feature | Value |
| :----------------------------------------------------------------------------------------------------------------------------- | :--------------------- |
| [Context window](https://platform.claude.com/docs/zh-TW/build-with-claude/context-windows) | 1M tokens |
| Max output | 128K tokens |
| [Max output (Batch API, beta)](https://platform.claude.com/docs/zh-TW/build-with-claude/batch-processing#extended-output-beta) | 300K tokens |
| [Thinking](https://platform.claude.com/docs/zh-TW/build-with-claude/thinking) | Adaptive (always on) |
| [Default effort](https://platform.claude.com/docs/zh-TW/build-with-claude/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](https://platform.claude.com/docs/zh-TW/about-claude/model-deprecations) | Active (latest) |
| Released | September 22, 2026 |
| Retirement | Not sooner than September 22, 2027 |
| Platforms | Claude API, [Amazon Bedrock](https://platform.claude.com/docs/zh-TW/build-with-claude/claude-in-amazon-bedrock), [Google Cloud](https://platform.claude.com/docs/zh-TW/build-with-claude/claude-on-vertex-ai), [Microsoft Foundry](https://platform.claude.com/docs/zh-TW/build-with-claude/claude-in-microsoft-foundry), [Claude Platform on AWS](https://platform.claude.com/docs/zh-TW/build-with-claude/claude-platform-on-aws) |
## 須知事項
* 「Adaptive thinking」（自適應思考）始終開啟，且無法關閉。請使用 [effort 參數](https://platform.claude.com/docs/zh-TW/build-with-claude/effort)控制思考深度。
* 在 [Message Batches API](https://platform.claude.com/docs/zh-TW/build-with-claude/batch-processing#extended-output-beta) 上，Claude Opus 5.5 搭配 `output-300k-2026-03-24` beta 標頭時，最多支援 300k 個輸出 token。
* 最小可快取提示長度為 512 個 token。請參閱[提示快取](https://platform.claude.com/docs/zh-TW/build-with-claude/prompt-caching#cache-limitations)。
* 使用 [Models API](https://platform.claude.com/docs/zh-TW/api/models/list) 以程式化方式查詢限制與功能。
## 資源
Claude Opus 5.5 特有的行為差異與提示模式。
用於控制思考深度、「latency」（延遲）與成本的設定。請依工作負載選擇等級。
自適應思考的運作方式，以及思考區塊如何被保留。
在 Claude API 上提供較低延遲的 Claude Opus 5.5，另行計價。
## 參考資料
Claude Opus 5.5 在 claude.ai 與 Claude 應用程式中使用的系統提示。
Claude Opus 5.5 的安全性評估與部署決策。
完整價目表，包括批次折扣與提示快取費率。
模型 ID、別名與固定快照的運作方式。
每個 Claude 模型的生命週期狀態與退役承諾。