Text generation and streaming

response, err := model.NewResponses(ctx, &responses.Request{
    Instructions: utils.Ptr("Answer concisely."),
    Input: responses.InputUnion{OfString: utils.Ptr("Explain a Go interface.")},
    Parameters: responses.Parameters{MaxOutputTokens: utils.Ptr(300)},
})
if err != nil { return err }
if response.Error != nil { return fmt.Errorf("model response: %s", response.Error.Message) }
for _, item := range response.Output {
    if item.OfOutputMessage == nil || item.OfOutputMessage.Content == nil { continue }
    for _, part := range *item.OfOutputMessage.Content {
        if part.OfOutputText != nil { fmt.Print(part.OfOutputText.Text) }
    }
}

streamCtx, cancel := context.WithCancel(ctx)
defer cancel()
stream, err := model.NewStreamingResponses(streamCtx, &responses.Request{
    Input: responses.InputUnion{OfString: utils.Ptr("Explain a Go interface.")},
})
if err != nil { return err }
for chunk := range stream {
    if chunk.OfError != nil { return chunk.OfError }
    if chunk.OfOutputTextDelta != nil { fmt.Print(chunk.OfOutputTextDelta.Delta) }
}
if err := streamCtx.Err(); err != nil { return err }