Claude Opus 5.5
Anthropic's large model, with a context window long enough to hold very large documents in one request.
| Model id | claude-opus-5.5 |
| Made by | Anthropic |
| Context window | 1 million tokens |
| Longest single answer | Not published yet |
| Reads images | Yes |
| Uses document tools | Yes |
| Plans | Light and Pro |
| Price | Included in your plan. Beyond your monthly allowance, billed per use if you turned on overage. |
Strengths
- Working across long reports, contracts and large workbooks
- Planning a sequence of changes before making them
- Careful reasoning over figures and structure
Used for
- Every request you send while it is selected, including the steps the assistant runs in the background for that request (planning, checking its work, summarising the conversation).
Larger and longer requests draw more of your allowance than short ones, whichever model you choose. See Usage.