Claude Opus 4

by Anthropic

Claude Opus 4 is a model from Anthropic, released on May 22, 2025. It has a 200K-token context window and can generate up to 32K output tokens. API pricing is $15 per 1M input tokens and $75 per 1M output tokens.

Claude Opus 4 is Anthropic's most powerful model and the world's best coding model, part of the Claude 4 family. It delivers sustained performance on complex, long-running tasks and agent workflows. Opus 4 excels at coding, advanced reasoning, and can use tools (like web search) during extended thinking. It supports parallel tool execution and has improved memory capabilities.

Key specs

ProviderAnthropic
Release date2025-05-22
Licenseproprietary
Context window200K tokens
Max output32K tokens
Input price$15 / 1M tokens
Output price$75 / 1M tokens
Intelligence Score27.7
Coding index17.2

Quick answers

What is the context window of Claude Opus 4?

Claude Opus 4 has a context window of 200K tokens, with a maximum output of 32K tokens per response.

How much does Claude Opus 4 cost?

Claude Opus 4 costs $15 per 1M input tokens and $75 per 1M output tokens through the API.

Is Claude Opus 4 open source?

No. Claude Opus 4 is a proprietary model from Anthropic (proprietary license).

When was Claude Opus 4 released?

Anthropic released Claude Opus 4 on May 22, 2025.

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