Anthropic: Claude Opus 4.1

AnthropicID: anthropic/claude-opus-4.1

Claude Opus 4.1 is an updated version of Anthropic’s flagship model, offering improved performance in coding, reasoning, and agentic tasks. It achieves 74.5% on SWE-bench Verified and shows notable gains in multi-file code refactoring, debugging precision, and detail-oriented reasoning. The model supports extended thinking up to 64K tokens and is optimized for tasks involving research, data analysis, and tool-assisted reasoning.

Pricing per 1M Tokens

Input (Prompt)$15
Output (Completion)$75
Cache Read$1.50
Cache Write$19
ImageN/A

Specifications

Context Length200K
Max Output Tokens32K
Input ModalitiesImage + Text + File
Output ModalitiesText
TokenizerClaude
Instruct TypeN/A
Top Provider Context200K
Top Provider Max Output32K
ModeratedYes

Compare this model

See how Anthropic: Claude Opus 4.1 stacks up against other models.

vs Anthropic: Claude Sonnet 4.6vs Anthropic: Claude Opus 4.6vs Anthropic: Claude Opus 4.5vs Anthropic: Claude Haiku 4.5vs Anthropic: Claude Sonnet 4.5

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Anthropic: Claude Haiku 4.5
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Last updated: March 23, 2026

First tracked: March 23, 2026