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Claude Opus 4

AnthropicArena Rank #1

Anthropic's most powerful model. Best-in-class for extended thinking, agentic workflows, and complex code generation.

Specifications

Context Window

200K

Parameters

Undisclosed

Input Price / 1M tokens

$15.00

Output Price / 1M tokens

$75.00

Arena Rank

#1

Open Source

No

Best For

Complex reasoningcodingagentic tasks

Pricing (per 1M tokens)

Input

$15.00

Output

$75.00

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Frequently Asked Questions

What is Claude Opus 4?▾
Anthropic's most powerful model. Best-in-class for extended thinking, agentic workflows, and complex code generation.
How much does Claude Opus 4 cost?▾
Claude Opus 4 costs $15.00 per 1M input tokens and $75.00 per 1M output tokens.
What is Claude Opus 4 best for?▾
Claude Opus 4 is best for: Complex reasoning, coding, agentic tasks.
Is Claude Opus 4 open source?▾
No, Claude Opus 4 is a proprietary model available through Anthropic's API.