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Orbitrage speaks OpenAI format only. You don’t use the Anthropic SDK — just name a Claude model in a normal chat-completions call and Orbitrage routes it to Anthropic for you.
  • Name any Claude model (claude-sonnet-4-6, claude-opus-4-8, …) and Orbitrage forwards to Anthropic and translates the request behind the scenes.
  • Or pass model="auto" and let the router choose an open-weight model.
  • Tools, streaming, and vision work exactly as in Tool calling and Streaming.
Claude models are BYOK-only. Save and enable an Anthropic key on the Models page — the call then runs on your Anthropic account at your rate and Orbitrage charges $0 for the tokens. With no enabled key, claude-* returns 403 byok_key_required rather than falling back to pooled inference. You still call in OpenAI format either way. See BYOK.