1M Token Long Context Window
Anthropic Claude: 1M token context
Anthropic’s Claude model family supports expanding the context window from the default 200K tokens to 1,000,000 tokens (1M)—5× the default capacity.
Info
Siraya AI automatically enables the 1M token context window for Claude Sonnet 4/4.5/4.6 models. No configuration is required.
- Learn more: Announcement, Context windows docs
- Pricing: Requests that exceed 200K tokens are charged at premium rates. See pricing details.
With Siraya AI, you can enable this capability effortlessly to handle large-scale document analysis, code review, long-running conversations, and more.
Supported Models
The following Claude models currently support the 1M-token context window:
| Model | Default Context Window | Extended Context Window |
|---|---|---|
| Claude Opus 4.6 | 200K tokens | 1M tokens |
| Claude Sonnet 4.5 | 200K tokens | 1M tokens |
| Claude Sonnet 4 | 200K tokens | 1M tokens |
Info
The 1M-token context window is currently a Beta feature, and functionality and pricing may change in future versions.
Long-Context Pricing
When the number of tokens in a request exceeds 200K, long-context pricing will apply automatically. The multipliers are as follows:
| Pricing Item | Up to 200K | Over 200K |
|---|---|---|
| Input tokens | 1x (standard rate) | 2x (double rate) |
| Output tokens | 1x (standard rate) | 1.5x (1.5× standard rate) |