All error codes

gpu_model_not_found

HTTP 404 Error

What happened

One of the card models you named is not offered on this server type, or is no longer sold. Model keys are per type: the same platform can offer different cards on different types.

What to do

Read GET /v1/server-types/{id}/pricing and take the key values from gpu_models of that type. Send the key exactly as it appears there.

Retrying

Fix the request and send it again.

How it arrives

{
    "type": "https://docs.fiberax.com/errors/gpu_model_not_found",
    "title": "Error",
    "status": 404,
    "code": "gpu_model_not_found",
    "request_id": "a277dcd1ca652c65"
}

Branch your code on code, never on the wording of title.