Guide
Two request shapes
GPT IDs use the familiar chat-completions shape. Claude IDs use the familiar messages shape. Both go to https://api.corouter.co.
chat completions
OpenAI model IDs such as gpt-6-astra and gpt-6-sol go in the model field beside a messages array.
messages
Anthropic model IDs such as claude-opus-5-5 also go in the model field. Do not put a GPT ID in that shape and expect a Claude model.
Questions
- Is corouter affiliated with OpenAI or Anthropic?
- No. Vendor names identify the model and the published list rate.