Last refreshed 2026-05-11. Next refresh: weekly.
Why use Claude 3.5 Sonnet on OpenRouter?
OpenRouter offers Claude 3.5 Sonnet with competitive pricing. 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 3.5 Sonnet across 6 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-3.5-sonnetanthropic/claude-3.5-sonnetRequest example
anthropic/claude-3.5-sonnet.Gotchas
- Use provider model ID "anthropic/claude-3.5-sonnet", not the LLMReference slug "claude-3.5-sonnet".
Compare Claude 3.5 Sonnet Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| GCP Vertex AI | $3.00 | $15.00 |
| AWS Bedrock | $3.00 | $15.00 |
| Anthropic | $3.00 | $15.00 |
| OpenRouter | — | — |
| Microsoft Foundry | — | — |
Capabilities
About Claude 3.5 Sonnet
Claude 3.5 Sonnet, the latest in Anthropic's line of large language models, merges state-of-the-art reasoning, coding, and natural language understanding capabilities with advanced multi-modal processing. Released in October 2024, it excels in benchmarks against previous models and competitors, thanks to its scalable attention mechanisms and massive neural network architecture. Its dynamic routing enables specialization in various tasks, supporting applications from software development and data analysis to customer support and content creation. Users benefit from its "Artifacts" feature for real-time collaborative workflows and can access the model through platforms like Claude.ai and APIs at competitive pricing rates.
FAQ
What is the context window for Claude 3.5 Sonnet on OpenRouter?
Claude 3.5 Sonnet supports a 200,000 token context window on OpenRouter.
How does OpenRouter compare to other Claude 3.5 Sonnet providers?
Claude 3.5 Sonnet is available from 6 providers. The cheapest input pricing is $3/1M tokens from GCP Vertex AI.
What API model ID do I use for Claude 3.5 Sonnet on OpenRouter?
Use the model ID anthropic/claude-3.5-sonnet when calling OpenRouter's API.
Who created Claude 3.5 Sonnet?
Claude 3.5 Sonnet was created by Anthropic as part of the Claude 3.5 model family.
Is Claude 3.5 Sonnet open source?
Claude 3.5 Sonnet's open source status is unknown in the seed data.