OpenAI 对话格式（Chat Completions）
简介
给定一组包含对话的消息列表，模型将返回一个响应。相关指南可参阅OpenAI官网：Chat Completions。
基础文本对话
js
curl https://api.nextaicore.com/v1/chat/completions \
-H "Content-Type: application/json" \
-H "Authorization: Bearer $API_KEY" \
-d '{
"model": "gpt-4.1",
"messages": [
{
"role": "system",
"content": "你是一个有帮助的助手。"
},
{
"role": "user",
"content": "你好！"
}
],
"stream": true
}'响应示例：
js
{
"id": "chatcmpl-C7cFr7HRoSbH1LDsyc1DFlnu2bBem",
"object": "chat.completion",
"created": 1755931383,
"model": "gpt-4.1-2025-04-14",
"choices": [
{
"index": 0,
"message": {
"role": "assistant",
"content": "你好！有什么可以帮您的吗？",
"refusal": null,
"annotations": []
},
"logprobs": null,
"finish_reason": "stop"
}
],
"usage": {
"prompt_tokens": 21,
"completion_tokens": 9,
"total_tokens": 30,
"prompt_tokens_details": {
"cached_tokens": 0,
"audio_tokens": 0
},
"completion_tokens_details": {
"reasoning_tokens": 0,
"audio_tokens": 0,
"accepted_prediction_tokens": 0,
"rejected_prediction_tokens": 0
}
},
"system_fingerprint": "fp_c79ab13e31"
}流式响应
js
curl https://api.nextaicore.com/v1/chat/completions \
-H "Content-Type: application/json" \
-H "Authorization: Bearer $API_KEY" \
-d '{
"model": "gpt-4.1",
"messages": [
{
"role": "system",
"content": "你是一个有帮助的助手。"
},
{
"role": "user",
"content": "你好！"
}
],
"stream": true
}'响应示例：
js
data: {"id":"","object":"","created":0,"model":"gpt-4.1-2025-04-14","choices":[]}
data: {"id":"chatcmpl-C7cMJVJjklJYcUDc0filozhZjekT6","object":"chat.completion.chunk","created":1755931783,"model":"gpt-4.1-2025-04-14","system_fingerprint":"fp_c79ab13e31","choices":[{"index":0,"delta":{"role":"assistant","content":"","refusal":null},"logprobs":null,"finish_reason":null}],"usage":{}}
data: {"id":"chatcmpl-C7cMJVJjklJYcUDc0filozhZjekT6","object":"chat.completion.chunk","created":1755931783,"model":"gpt-4.1-2025-04-14","system_fingerprint":"fp_c79ab13e31","choices":[{"index":0,"delta":{"content":"你好"},"logprobs":null,"finish_reason":null}],"usage":{}}
data: {"id":"chatcmpl-C7cMJVJjklJYcUDc0filozhZjekT6","object":"chat.completion.chunk","created":1755931783,"model":"gpt-4.1-2025-04-14","system_fingerprint":"fp_c79ab13e31","choices":[{"index":0,"delta":{"content":"！"},"logprobs":null,"finish_reason":null}],"usage":{}}
data: {"id":"chatcmpl-C7cMJVJjklJYcUDc0filozhZjekT6","object":"chat.completion.chunk","created":1755931783,"model":"gpt-4.1-2025-04-14","system_fingerprint":"fp_c79ab13e31","choices":[{"index":0,"delta":{"content":"有什么"},"logprobs":null,"finish_reason":null}],"usage":{}}
data: {"id":"chatcmpl-C7cMJVJjklJYcUDc0filozhZjekT6","object":"chat.completion.chunk","created":1755931783,"model":"gpt-4.1-2025-04-14","system_fingerprint":"fp_c79ab13e31","choices":[{"index":0,"delta":{"content":"我"},"logprobs":null,"finish_reason":null}],"usage":{}}
data: {"id":"chatcmpl-C7cMJVJjklJYcUDc0filozhZjekT6","object":"chat.completion.chunk","created":1755931783,"model":"gpt-4.1-2025-04-14","system_fingerprint":"fp_c79ab13e31","choices":[{"index":0,"delta":{"content":"可以"},"logprobs":null,"finish_reason":null}],"usage":{}}
data: {"id":"chatcmpl-C7cMJVJjklJYcUDc0filozhZjekT6","object":"chat.completion.chunk","created":1755931783,"model":"gpt-4.1-2025-04-14","system_fingerprint":"fp_c79ab13e31","choices":[{"index":0,"delta":{"content":"帮"},"logprobs":null,"finish_reason":null}],"usage":{}}
data: {"id":"chatcmpl-C7cMJVJjklJYcUDc0filozhZjekT6","object":"chat.completion.chunk","created":1755931783,"model":"gpt-4.1-2025-04-14","system_fingerprint":"fp_c79ab13e31","choices":[{"index":0,"delta":{"content":"你"},"logprobs":null,"finish_reason":null}],"usage":{}}
data: {"id":"chatcmpl-C7cMJVJjklJYcUDc0filozhZjekT6","object":"chat.completion.chunk","created":1755931783,"model":"gpt-4.1-2025-04-14","system_fingerprint":"fp_c79ab13e31","choices":[{"index":0,"delta":{"content":"的吗"},"logprobs":null,"finish_reason":null}],"usage":{}}
data: {"id":"chatcmpl-C7cMJVJjklJYcUDc0filozhZjekT6","object":"chat.completion.chunk","created":1755931783,"model":"gpt-4.1-2025-04-14","system_fingerprint":"fp_c79ab13e31","choices":[{"index":0,"delta":{"content":"？"},"logprobs":null,"finish_reason":null}],"usage":{}}
data: {"id":"chatcmpl-C7cMJVJjklJYcUDc0filozhZjekT6","object":"chat.completion.chunk","created":1755931783,"model":"gpt-4.1-2025-04-14","system_fingerprint":"fp_c79ab13e31","choices":[{"index":0,"delta":{"content":"😊"},"logprobs":null,"finish_reason":null}],"usage":{}}
data: {"id":"chatcmpl-C7cMJVJjklJYcUDc0filozhZjekT6","object":"chat.completion.chunk","created":1755931783,"model":"gpt-4.1-2025-04-14","system_fingerprint":"fp_c79ab13e31","choices":[{"index":0,"delta":{},"logprobs":null,"finish_reason":"stop"}],"usage":{}}
data: [DONE]图像分析对话
js
curl https://api.nextaicore.com/v1/chat/completions \
-H "Content-Type: application/json" \
-H "Authorization: Bearer $API_KEY" \
-d '{
"model": "gpt-4.1",
"messages": [
{
"role": "user",
"content": [
{
"type": "text",
"text": "这张图片里有什么？"
},
{
"type": "image_url",
"image_url": {
"url": "https://upload.wikimedia.org/wikipedia/commons/thumb/d/dd/Gfp-wisconsin-madison-the-nature-boardwalk.jpg/2560px-Gfp-wisconsin-madison-the-nature-boardwalk.jpg"
}
}
]
}
],
"max_tokens": 300
}'响应示例：
js
{
"id": "chatcmpl-C7cUbTqDLw9ICl6imC6RBEfMdI4Os",
"object": "chat.completion",
"created": 1755932297,
"model": "gpt-4.1-2025-04-14",
"choices": [
{
"index": 0,
"message": {
"role": "assistant",
"content": "这张图片里有一条木头铺成的小路，延伸到远方。小路两旁是大片绿色的草地和一些灌木，背景中有一些树木。天空很蓝，有一些薄薄的白云，整个画面显得很宁静和清新，有田园或湿地的感觉。",
"refusal": null,
"annotations": []
},
"logprobs": null,
"finish_reason": "stop"
}
],
"usage": {
"prompt_tokens": 921,
"completion_tokens": 75,
"total_tokens": 996,
"prompt_tokens_details": {
"cached_tokens": 0,
"audio_tokens": 0
},
"completion_tokens_details": {
"reasoning_tokens": 0,
"audio_tokens": 0,
"accepted_prediction_tokens": 0,
"rejected_prediction_tokens": 0
}
},
"system_fingerprint": "fp_c79ab13e31"
}