Anthropic / MODEL CARD
Claude Opus 5.5
Thoughtful work, from start to finish.
Overview
Designed for extended coding sessions and knowledge work. Opus combines a million-token context with adaptive thinking for tasks that span many steps.
Working with Claude Opus 5.5
Adaptive thinking is always enabled. Control depth with effort; preserve thinking blocks when continuing tool conversations.
Specifications
- Official model ID
claude-opus-5-5- Context window
- 1,000,000 tokens
- Maximum output
- 128,000 tokens
- Input
- Text and images
- Output
- Text
- Knowledge cutoff
- June 2026
Manufacturer specifications · checked October 8, 2026. Cloud limits are shown separately below.
Anthropic model documentation ↗Reference pricing
Anthropic standard text rates / 1M tokens
Input$4.00
Output$20.00
Manufacturer rates. Long context, caching, tools, and processing modes can change the price. See the official documentation for details.
opencodex Cloud
Cloud access and prices are shown separately from manufacturer specifications.
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