OpenRouter: failed to deserialize api response: error:missing field `status`

[ebamberg]

I am new to Rust and new to async_openai library and trying to use the OpenAIConfig with openrouter.ai, see code below.

I receive an error when async_openai tries to deserialise the response from openrouter cause the field status is missing in the response.

Error: failed to deserialize api response: error:missing field status

is this a bug, or do I do something wrong ? Do I need somekind of a custom response type for OpenRouter ?

my code (as I said I am new to Rust as well.)

let config = OpenAIConfig::new()
.with_api_key(api_key)
.with_api_base("https://openrouter.ai/api/v1");

let client = Client::with_config(config);

let request = CreateResponseArgs::default()
    .model(model)
    .input("What is the capitol of France?")
    .max_output_tokens(512u32)
    .build().unwrap();

let response = client
    .responses()      // Get the API "group" (responses, images, etc.) from the client
    .create(request)  // Make the API call in that "group"
    .await;

match response{
    Ok(response) => println!("Response: {:?}", response.output_text()),
    Err(err) => println!("Error: {}", err),
}

[ebamberg]

Btw the response that openrouter returns is valid and contains the response-text and no error.

{"object":"response","id":"gen-1766176041-YGQlFVvzj4Bb88zGOdhD","created_at":1766176041,"model":"google/gemma-3-27b-it:free","error":null,"output_text":"","output":[{"role":"assistant","type":"message","status":"completed","content":[{"type":"output_text","text":"The capital of France is Paris. \n\nIt's the country's most populous city and a major global center for art, fashion, gastronomy, and culture.\n\n\n\n","annotations":[]}],"id":"msg_tmp_w1wbe8xzcns"}],"incomplete_details":null,"tools":[],"tool_choice":"auto","parallel_tool_calls":true,"max_output_tokens":512,"temperature":null,"top_p":null,"metadata":{},"background":false,"previous_response_id":null,"service_tier":"auto","truncation":null,"store":false,"instructions":null,"reasoning":null,"safety_identifier":null,"prompt_cache_key":null,"user":null,"usage":{"input_tokens":8,"input_tokens_details":{"cached_tokens":0},"output_tokens":0,"output_tokens_details":{"reasoning_tokens":0},"total_tokens":8,"cost":0,"is_byok":false,"cost_details":{"upstream_inference_cost":null,"upstream_inference_input_cost":0,"upstream_inference_output_cost":0}}}

[64bit]

It sounds like the response does not contain status field, but Rust type expects it (a non-optional field) - and hence you'll see deserialization error.

This is the one of the reason this crate's scope is official OpenAI APIs.

That said, for your use case you might want to explore byot along with serde_json::Value for it: https://github.com/64bit/async-openai?tab=readme-ov-file#bring-your-own-types

[ebamberg]

Thank you I will have a look into byot