Last refreshed 2026-05-15. Next refresh: weekly.
Why use Claude 4 Opus on OpenRouter?
OpenRouter offers Claude 4 Opus with pay-as-you-go pricing at $15.00/1M input tokens. OpenRouter is a multi-provider LLM aggregator offering unified API access to 300+ models from all major labs and emerging providers, with automatic failover for reliability.
Setup recipe
Docs fallbackUse the provider REST API or SDKCreate a provider API keymodel: anthropic/claude-opus-4anthropic/claude-opus-4Request example
anthropic/claude-opus-4.Gotchas
- Use provider model ID "anthropic/claude-opus-4", not the LLMReference slug "claude-4-opus".
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $15.00 |
| Output tokens | $75.00 |
Capabilities
About Claude 4 Opus
Anthropic Claude 4 Opus API snapshot (claude-opus-4-20250514), deprecated April 14, 2026 with Claude API retirement scheduled for June 15, 2026. Use Claude Opus 4.7 for current integrations.
FAQ
What does Claude 4 Opus cost on OpenRouter?
On OpenRouter, Claude 4 Opus costs $15 per 1M input tokens and $75 per 1M output tokens.
What is the context window for Claude 4 Opus on OpenRouter?
Claude 4 Opus supports a 200,000 token context window on OpenRouter.
What API model ID do I use for Claude 4 Opus on OpenRouter?
Use the model ID anthropic/claude-opus-4 when calling OpenRouter's API.
Who created Claude 4 Opus?
Claude 4 Opus was created by Anthropic as part of the Claude 4 model family.
Is Claude 4 Opus open source?
Claude 4 Opus is not open source; the seed data lists it as proprietary.