Last refreshed 2026-10-07. Next refresh: weekly.
Why use Claude Sonnet 5.5 on OpenRouter?
OpenRouter offers Claude Sonnet 5.5 with pay-as-you-go pricing at $2.00/1M 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 5.5 across 5 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-5.5anthropic/claude-sonnet-5.5Request example
anthropic/claude-sonnet-5.5.Gotchas
- Use provider model ID "anthropic/claude-sonnet-5.5", not the LLMReference slug "claude-sonnet-5-5".
Compare Claude Sonnet 5.5 Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| Anthropic | $2.00 | $10.00 |
| AWS Bedrock | $2.00 | $10.00 |
| GCP Vertex AI | $2.00 | $10.00 |
| Microsoft Foundry | $2.00 | $10.00 |
| OpenRouter | $2.00 | $10.00 |
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $2.00 |
| Output tokens | $10.00 |
Capabilities
About Claude Sonnet 5.5
Anthropic's Claude Sonnet 5.5, second model in the Claude 5.5 family, released September 28, 2026. First-party positioning: faster, lower-cost complement to Claude Opus 5.5; strongest at well-scoped everyday tasks, bug fixes, and polished documents/slides/spreadsheets; clear upgrade over Claude Sonnet 5 (30%+ faster output; up to 30% less cost per task via fewer tokens — list price unchanged vs Sonnet 5). Claude API id claude-sonnet-5-5. List price $2 per 1M input and $10 per 1M output; cache reads $0.10 / MTok; 5m cache writes $2.50; 1h cache writes $4; Batch API 50% off ($1/$5).