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Messages
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POST
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Authorizations
OrcaRouter API keys look like sk-orca-.... Pass them in the
Authorization: Bearer sk-orca-... header.
Body
application/json
Example:
"anthropic/claude-sonnet-4.6"
Anthropic extended thinking. Set on Claude 4 / Claude Opus models that support thinking. The model emits a hidden reasoning pass before its final answer.
Free-form MCP server configuration forwarded to Anthropic verbatim.
