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 · Migrate to Claude Sonnet 5.5
Model ID: claude-sonnet-4-6
Context window: 1M tokens · Max output: 128K tokens · Input pricing: $3 / MTok · Output pricing: $15 / MTok
与当前模型阵容的比较
| Model | Context | Max output | Price / MTok | Thinking | Default effort | Knowledge cutoff |
|---|---|---|---|---|---|---|
| Claude Fable 5.1 | 1M | 128K | $10 / $50 | Adaptive (always on) | high |
Jun 2026 |
| Claude Opus 5.5 | 1M | 128K | $4 / $20 | Adaptive (always on) | medium |
Jun 2026 |
| Claude Sonnet 5.5 | 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 | 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.
规格
Model IDs
| Platform | Model ID |
|---|---|
| Claude API | claude-sonnet-4-6 |
| Amazon Bedrock (InvokeModel) | anthropic.claude-sonnet-4-6 |
| Claude Models on Google Cloud (Google managed) | claude-sonnet-4-6 |
| Microsoft Foundry | claude-sonnet-4-6 |
| Claude Platform on AWS | claude-sonnet-4-6 |
| Claude Models on Google Cloud (Anthropic managed) | claude-sonnet-4-6 |
Pricing
| Feature | Value |
|---|---|
| Input | $3 / MTok |
| Output | $15 / MTok |
| 5m cache write | $3.75 / MTok |
| 1h cache write | $6 / MTok |
| Cache read | $0.30 / 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 (extended deprecated) |
| Default effort | high |
| Input → output | Text and images → text |
| Reliable knowledge cutoff | Aug 2025 |
| Training data cutoff | Jan 2026 |
Availability
| Feature | Value |
|---|---|
| Status | Active (legacy) |
| Released | February 17, 2026 |
| Retirement | Not sooner than February 17, 2027 |
| Platforms | Claude API, Amazon Bedrock (InvokeModel), Claude Models on Google Cloud (Google managed), Microsoft Foundry, Claude Platform on AWS, Claude Models on Google Cloud (Anthropic managed) |
资源
-
迁移到 Claude Sonnet 5.5：从 Claude Sonnet 4.6 迁移到 Claude Sonnet 5.5 时会发生哪些变化。
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Claude Sonnet 5.5：当前的 Sonnet 模型：概述、规格和资源。
参考
-
系统提示：Claude Sonnet 4.6 在 claude.ai 和 Claude 应用中使用的 “system prompt”（系统提示）。
-
系统卡：Claude Sonnet 4.6 的安全评估和部署决策。
-
定价：完整价格列表，包括批量折扣和 “prompt caching”（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。
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Amazon Bedrock（Opus 4.6 及更早版本）：Claude Sonnet 4.6 使用 InvokeModel Bedrock 集成和 Bedrock 风格的模型 ID。