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Models/Anthropic/Opus 5.5

Opus 5.5

Anthropic 🧠 Language Model

Opus 5.5 by Anthropic (2026-09-21): the next Opus, for long-running agentic coding and knowledge work. 1M context, 128K output, adaptive thinking always on.

Specifications

Input modalitiestext, image
Output modalitiestext
Capabilitiestools, reasoning
Relative speed●●●○○ Average
Context window1,000,000 tokens
Max output128,000 tokens
Vision inputYes
Tool callingYes
Streaming outputYes
Input price$7.00 / 1M
Output price$35.00 / 1M

Pricing

$7.00 / 1M input tokens  ·  $35.00 / 1M output tokens

Platform credit pricing — live rates on the Models page.

Use Opus 5.5 on Zubnet →

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