Simple request + error.

-- request --
{
  "messages": [
    {
      "role": "user",
      "content": "how many angels can dance on the head of a pin\n"
    }
  ],
  "model": "gpt-4.1",
  "stream": true
}

-- streaming --
data: {"id":"chatcmpl-BwoiPTGRbKkY5rncfaM0s9KtWrq5N","object":"chat.completion.chunk","created":1753357673,"model":"gpt-4.1-2025-04-14","service_tier":"default","system_fingerprint":"fp_51e1070cf2","choices":[{"index":0,"delta":{"role":"assistant","content":"","refusal":null},"logprobs":null,"finish_reason":null}],"usage":null}

data: {"id":"chatcmpl-BwoiPTGRbKkY5rncfaM0s9KtWrq5N","object":"chat.completion.chunk","created":1753357673,"model":"gpt-4.1-2025-04-14","service_tier":"default","system_fingerprint":"fp_51e1070cf2","choices":[{"index":0,"delta":{"content":"The"},"logprobs":null,"finish_reason":null}],"usage":null}

data: {"id":"chatcmpl-BwoiPTGRbKkY5rncfaM0s9KtWrq5N","object":"chat.completion.chunk","created":1753357673,"model":"gpt-4.1-2025-04-14","service_tier":"default","system_fingerprint":"fp_51e1070cf2","choices":[{"index":0,"delta":{"content":" question"},"logprobs":null,"finish_reason":null}],"usage":null}

data: {"id":"chatcmpl-BwoiPTGRbKkY5rncfaM0s9KtWrq5N","object":"chat.completion.chunk","created":1753357673,"model":"gpt-4.1-2025-04-14","service_tier":"default","system_fingerprint":"fp_51e1070cf2","choices":[{"index":0,"delta":{"content":" \""},"logprobs":null,"finish_reason":null}],"usage":null}

data: {"error": {"message": "The server had an error while processing your request. Sorry about that!", "type": "server_error"}}