Step 3.5 Flash-2603

Overview

Model description: original source language.

基于 Step 3.5 Flash 针对高频 Agent 场景优化，在保留旗舰推理与工具调用能力的同时，进一步提升 Token 效率与推理速度，并支持切换低推理模式以降低消耗。对 Coding 与 Agent 框架兼容性也做了专项优化。

Pricing

Pricing follows the current settings of your account group.

API integration

Use a Yunhai API key to call configured models.

curl "$YUNHAI_BASE_URL/chat/completions" \
  -H "Authorization: Bearer $YUNHAI_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"stepfun/step-3.5-flash-2603","messages":[{"role":"user","content":"你好"}]}'