先获取模型列表
curl https://claudeagent.com.cn/v1/models \
-H "Authorization: Bearer YOUR_API_KEY"从返回结果复制模型名，再发送正式请求，可以避免因模型别名变化得到 503。
Chat Completions
curl https://claudeagent.com.cn/v1/chat/completions \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "gpt-6-astra",
"messages": [{"role": "user", "content": "Reply with OK"}]
}'OpenAI SDK 的 base_url 应填写 https://claudeagent.com.cn/v1。