curl --location --request POST 'https://cn2us02.opapi.win/v1/chat/completions' \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data-raw '{
    "model": "gpt-3.5-turbo",
    "messages": [
        {
            "role": "system",
            "content": "You are a helpful assistant."
        },
        {
            "role": "user",
            "content": "Say test"
        }
    ]
}'{
    "id": "chatcmpl-CKHZZAc3pBCNZrwv5PoN8yXMuEbiT",
    "object": "chat.completion",
    "created": 1758950145,
    "model": "gpt-5-nano-2025-08-07",
    "choices": [
        {
            "index": 0,
            "message": {
                "role": "assistant",
                "content": "test",
                "refusal": null,
                "annotations": []
            },
            "finish_reason": "stop"
        }
    ],
    "usage": {
        "prompt_tokens": 18,
        "completion_tokens": 138,
        "total_tokens": 156,
        "prompt_tokens_details": {
            "cached_tokens": 0,
            "audio_tokens": 0
        },
        "completion_tokens_details": {
            "reasoning_tokens": 128,
            "audio_tokens": 0,
            "accepted_prediction_tokens": 0,
            "rejected_prediction_tokens": 0
        }
    },
    "service_tier": "default",
    "system_fingerprint": null
}