size: 198B. 默认reasoning_effort: medium。阶跃星辰的旗舰多模态推理模型。基于 198B 总参数 / 11B 激活参数的稀疏 MoE 架构，原生支持图片和视频理解。
curl https://api.yourplatform.com/v1/chat/completions \
-H "Content-Type: application/json" \
-H "Authorization: Bearer YOUR_API_KEY" \
-d '{
"model": "undefined",
"messages": [
{"role": "user", "content": "Hello!"}
],
"stream": true
}'