Last refreshed 2026-09-28. Next refresh: weekly.
Why use Claude Opus 5.5 on OpenRouter?
OpenRouter offers Claude Opus 5.5 with pay-as-you-go pricing at $4.00/1M 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 Opus 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-opus-5.5anthropic/claude-opus-5.5Request example
anthropic/claude-opus-5.5.Gotchas
- Use provider model ID "anthropic/claude-opus-5.5", not the LLMReference slug "claude-opus-5-5".
Compare Claude Opus 5.5 Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| Anthropic | $4.00 | $20.00 |
| AWS Bedrock | $4.00 | $20.00 |
| GCP Vertex AI | $4.00 | $20.00 |
| Microsoft Foundry | $4.00 | $20.00 |
| OpenRouter | $4.00 | $20.00 |
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $4.00 |
| Output tokens | $20.00 |
Capabilities
About Claude Opus 5.5
Anthropic's Claude Opus 5.5, first model in the Claude 5.5 family, released September 22, 2026. First-party positioning: long-running agentic coding and knowledge work; performs at the level of Claude Fable 5.1 on most work; typical workloads about 40% less cost than Opus 5 at default settings (list input/output 20% below Opus 5; cache reads 60% below). Claude API id claude-opus-5-5. List price $4 per 1M input and $20 per 1M output; cache reads $0.20 per 1M tokens (0.05x base input); 5-minute cache writes $5; 1-hour cache writes $8; Batch API 50% off ($2/$10).