Last refreshed 2026-05-25. Next refresh: weekly.
Why use Claude Sonnet 4 on OpenRouter?
OpenRouter offers Claude Sonnet 4 with pay-as-you-go pricing at $3.00/1M 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.
Compare Claude Sonnet 4 across 4 providers to find the best fit for your use caseSetup recipe
Docs fallbackUse the provider REST API or SDKCreate a provider API keymodel: anthropic/claude-sonnet-4anthropic/claude-sonnet-4Request example
anthropic/claude-sonnet-4.Gotchas
- Use provider model ID "anthropic/claude-sonnet-4", not the LLMReference slug "claude-sonnet-4".
Compare Claude Sonnet 4 Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| Anthropic | $3.00 | $15.00 |
| AWS Bedrock | $8.00 | $40.00 |
| OpenRouter | $3.00 | $15.00 |
| Vercel AI Gateway | $3.00 | $15.00 |
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $3.00 |
| Output tokens | $15.00 |
Capabilities
About Claude Sonnet 4
Claude Sonnet 4 API snapshot (claude-sonnet-4-20250514) is deprecated and scheduled to retire from Anthropic-operated platforms on June 15, 2026. Use Claude Sonnet 4.6 for current integrations.
FAQ
What does Claude Sonnet 4 cost on OpenRouter?
On OpenRouter, Claude Sonnet 4 costs $3 per 1M input tokens and $15 per 1M output tokens.
What is the context window for Claude Sonnet 4 on OpenRouter?
Claude Sonnet 4 supports a 1m token context window on OpenRouter.
How does OpenRouter compare to other Claude Sonnet 4 providers?
Claude Sonnet 4 is available from 4 providers. The cheapest input pricing is $3.00/1M tokens from Anthropic.
What API model ID do I use for Claude Sonnet 4 on OpenRouter?
Use the model ID anthropic/claude-sonnet-4 when calling OpenRouter's API.
Who created Claude Sonnet 4?
Claude Sonnet 4 was created by Anthropic as part of the Claude 4 model family.
Is Claude Sonnet 4 open source?
Claude Sonnet 4 is not open source; the seed data lists it as proprietary.