Arena API Documentation

The Arena API is an OpenAI-compatible gateway that routes requests to the best AI model using Arena's leaderboard rankings. Use any OpenAI SDK to get started.

Getting StartedCreate your API key and make your first request in under a minute.OpenClawConnect OpenClaw to the Arena API and use routing modes like auto or fast.OpenCodeConnect OpenCode to the Arena API and use Arena routing modes like auto or fast.Claude CodePoint Claude Code at the Arena Gateway and route /v1/messages traffic through Arena billing and logging.ConductorConfigure Conductor's Claude Code agents to use the Arena API as their Anthropic-compatible gateway.CodexRun Codex through the local Responses proxy and forward /v1/responses traffic through Arena Gateway.Routing ModesLet Arena pick the best model with auto, max, fast, or cheap routing.LimitationsResearch preview constraints: text-only models, rate limits, and routing caveats.Rate LimitsAccount rate-limit tiers, enforced dimensions, and 429 response headers.Errors & Status CodesError response format, status codes, and debugging with trace IDs.API ReferenceFull OpenAPI documentation for all endpoints.