Claude Opus 5.5 (Fast)

Claude Opus 5.5 is a step-change improvement over Opus 5 for agentic coding, long-running agentic tasks, knowledge work, communication, and vision. It is more token-efficient per completed task and reports progress, findings, and next steps in clear language.

Model overview

Model ID: anthropic/claude-opus-5.5-fast
Provider: anthropic
Type: language
Context window: 1,000,000 tokens
Max output tokens: 128,000

Tags: explicit-caching, fast, file-input, reasoning, tool-use, vision, web-search

Model pricing

Metric	Value
`Input tokens (/1M)`	`$8.00`
`Output tokens (/1M)`	`$40.00`
`Image generation`	`n/a`
`Cached input read (/1M)`	`$0.40`
`Cached input write (/1M)`	`$10.00`
`Pricing source`	`gateway`

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