Responses API (beta)

Warning: The Responses API is in beta and may change without notice. Prefer ChatComplete for production workloads.

OpenAI-compatible stateless Responses API: reasoning, tool calling, web search, streaming.

resp, err := client.CreateResponse(ctx,
    "Explain quantum entanglement.",              // input (string or structured)
    openrouter.WithResponsesModel("openai/o1"),
    openrouter.WithResponsesReasoningEffort("medium"),
)

Streaming:

stream, _ := client.CreateResponseStream(ctx, "...",
    openrouter.WithResponsesModel("openai/o1"),
)
defer stream.Close()
for ev := range stream.Events() {
    // ev is a typed Responses stream event
}
if err := stream.Err(); err != nil { return err }

See examples/responses/main.go and responses_options.go for the full option set (tools, web search, metadata, max output tokens, etc.).