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Anthropic: Claude Opus 4

anthropic/claude-opus-4

Released May 22, 2025Knowledge cutoff Jan 31, 2025200,000 context$15/M input tokens$75/M output tokens

Claude Opus 4 is benchmarked as the world’s best coding model, at time of release, bringing sustained performance on complex, long-running tasks and agent workflows. It sets new benchmarks in software engineering, achieving leading results on SWE-bench (72.5%) and Terminal-bench (43.2%). Opus 4 supports extended, agentic workflows, handling thousands of task steps continuously for hours without degradation.

Read more at the blog post here(opens in new tab)

Overview
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Uptime
API

Performance for Claude Opus 4

Compare different providers across OpenRouter

Effective Pricing for Claude Opus 4

Actual cost per million tokens across providers over the past hour

Apps using Claude Opus 4

Top public apps this month

Recent activity on Claude Opus 4

Total usage per day on OpenRouter

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Uptime stats for Claude Opus 4

Uptime stats for Claude Opus 4 across all providers

Providers for Claude Opus 4

OpenRouter routes requests to the best providers that are able to handle your prompt size and parameters, with fallbacks to maximize uptime.

Sample code and API for Claude Opus 4

OpenRouter normalizes requests and responses across providers for you.

OpenRouter provides an OpenAI-compatible completion API to 300+ models & providers that you can call directly, or using the OpenAI SDK. Additionally, some third-party SDKs are available.

In the examples below, the OpenRouter-specific headers are optional. Setting them allows your app to appear on the OpenRouter leaderboards.

Using third-party SDKs

For information about using third-party SDKs and frameworks with OpenRouter, please see our frameworks documentation.

See the Request docs for all possible fields, and Parameters for explanations of specific sampling parameters.