--- title: Claude Sonnet 4.6 url: https://platform.claude.com/docs/ja/models/sonnet-4-6/overview description: Claude Sonnet 4.6のリファレンス：ライフサイクルステータス、各プラットフォームでのモデルID、コンテキストウィンドウ、出力制限、料金、移行リソース。Claude Sonnet 4.6はレガシーモデルです。現在のSonnetモデルはClaude Sonnet 5.5です。 --- **Legacy.** Released February 17, 2026. Although Claude Sonnet 4.6 is still available, you should consider migrating to Claude Sonnet 5.5. [See Claude Sonnet 5.5](https://platform.claude.com/docs/ja/models/sonnet-5-5/overview) · [Migrate to Claude Sonnet 5.5](https://platform.claude.com/docs/ja/models/sonnet-5-5/migration-guide#migrating-from-claude-sonnet-4-6) Model ID: `claude-sonnet-4-6` Context window: 1M tokens · Max output: 128K tokens · Input pricing: $3 / MTok · Output pricing: $15 / MTok [Announcement](https://www.anthropic.com/news/claude-sonnet-4-6) ## 現在のラインナップとの比較 | Model | Context | Max output | Price / MTok | Thinking | Default effort | Knowledge cutoff | | :---------------------------------------------------------------------------------- | :------ | :--------- | :----------------- | :----------------------------- | :------------- | :--------------- | | [Claude Fable 5.1](https://platform.claude.com/docs/ja/models/fable-5-1/overview) | 1M | 128K | $10 / $50 | Adaptive (always on) | `high` | Jun 2026 | | [Claude Opus 5.5](https://platform.claude.com/docs/ja/models/opus-5-5/overview) | 1M | 128K | $4 / $20 | Adaptive (always on) | `medium` | Jun 2026 | | [Claude Sonnet 5.5](https://platform.claude.com/docs/ja/models/sonnet-5-5/overview) | 1M | 128K | $2 / $10 | Adaptive | `high` | Jun 2026 | | **Claude Sonnet 4.6** (this model) | 1M | 128K | $3 / $15 | Adaptive (extended deprecated) | `high` | Aug 2025 | | [Claude Haiku 5.5](https://platform.claude.com/docs/ja/models/haiku-5-5/overview) | 1M | 128K | From $0.10 / $0.50 | 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. * **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. ## 仕様 ### Model IDs | Platform | Model ID | | :-------------------------------------------------------------------------------------------------------------------- | :---------------------------- | | Claude API | `claude-sonnet-4-6` | | [Amazon Bedrock (InvokeModel)](https://platform.claude.com/docs/ja/build-with-claude/claude-on-amazon-bedrock-legacy) | `anthropic.claude-sonnet-4-6` | | [Google Cloud](https://platform.claude.com/docs/ja/build-with-claude/claude-on-vertex-ai) | `claude-sonnet-4-6` | | [Microsoft Foundry](https://platform.claude.com/docs/ja/build-with-claude/claude-in-microsoft-foundry) | `claude-sonnet-4-6` | | [Claude Platform on AWS](https://platform.claude.com/docs/ja/build-with-claude/claude-platform-on-aws) | `claude-sonnet-4-6` | ### Pricing | Feature | Value | | :------------------------------------------------------------------------------------- | :------------------------------- | | Input | $3 / MTok | | Output | $15 / MTok | | [5m cache write](https://platform.claude.com/docs/ja/build-with-claude/prompt-caching) | $3.75 / MTok | | [1h cache write](https://platform.claude.com/docs/ja/build-with-claude/prompt-caching) | $6 / MTok | | [Cache read](https://platform.claude.com/docs/ja/build-with-claude/prompt-caching) | $0.30 / MTok | | [Batch API](https://platform.claude.com/docs/ja/build-with-claude/batch-processing) | 50% discount on input and output | [Full price list](https://platform.claude.com/docs/ja/about-claude/pricing) ### Capabilities | Feature | Value | | :-------------------------------------------------------------------------------------------------------------------------- | :----------------------------- | | [Context window](https://platform.claude.com/docs/ja/build-with-claude/context-windows) | 1M tokens | | Max output | 128K tokens | | [Max output (Batch API, beta)](https://platform.claude.com/docs/ja/build-with-claude/batch-processing#extended-output-beta) | 300K tokens | | [Thinking](https://platform.claude.com/docs/ja/build-with-claude/thinking) | Adaptive (extended deprecated) | | [Default effort](https://platform.claude.com/docs/ja/build-with-claude/effort) | `high` | | Input → output | Text and images → text | | Reliable knowledge cutoff | Aug 2025 | | Training data cutoff | Jan 2026 | ### Availability | Feature | Value | | :---------------------------------------------------------------------------- | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | [Status](https://platform.claude.com/docs/ja/about-claude/model-deprecations) | Active (legacy) | | Released | February 17, 2026 | | Retirement | Not sooner than February 17, 2027 | | Platforms | Claude API, [Amazon Bedrock (InvokeModel)](https://platform.claude.com/docs/ja/build-with-claude/claude-on-amazon-bedrock-legacy), [Google Cloud](https://platform.claude.com/docs/ja/build-with-claude/claude-on-vertex-ai), [Microsoft Foundry](https://platform.claude.com/docs/ja/build-with-claude/claude-in-microsoft-foundry), [Claude Platform on AWS](https://platform.claude.com/docs/ja/build-with-claude/claude-platform-on-aws) | ## リソース Claude Sonnet 4.6からClaude Sonnet 5.5へ移行する際の変更点。 現在のSonnetモデル：概要、仕様、リソース。 ## リファレンス Claude Sonnet 4.6がclaude.aiおよびClaudeアプリで使用するシステムプロンプト。 Claude Sonnet 4.6の安全性評価とデプロイメントの決定。 バッチ割引やプロンプトキャッシングのレートを含む完全な価格リスト。 モデルID、エイリアス、固定スナップショットの仕組み。 すべてのClaudeモデルのライフサイクルステータスと廃止に関するコミットメント。 Claude Sonnet 4.6はInvokeModel Bedrock統合とBedrockスタイルのモデルIDを使用します。