Step 3.7 Flash
Step 3.7 Flash is StepFun's latest high-efficiency multimodal Mixture-of-Experts model. It pairs a 196B-parameter language backbone with a vision encoder for native image and video understanding, activating roughly 11B parameters per token. The model supports a 256K context window and exposes selectable reasoning levels (high/medium/low), letting callers trade off speed, cost, and depth of reasoning. Designed for coding, agentic workflows, structured outputs, and long-context productivity tasks.
stepfun/step-3.7-flash
- Context
- 262k tokens
- Completion cap
- 256,000
- Tools
- Yes
- JSON
- Yes
- Released
- 2026-05-28
Call it from Geek Hub
Same OpenAI SDK. Change the base URL and the model id.
curl https://api.geekhub.mx/v1/chat/completions \
-H "Authorization: Bearer $GEEKHUB_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "stepfun/step-3.7-flash",
"messages": [{"role": "user", "content": "Hola"}]
}'Frequently asked questions
- What is Step 3.7 Flash?
- Step 3.7 Flash is StepFun's latest high-efficiency multimodal Mixture-of-Experts model. It pairs a 196B-parameter language backbone with a vision encoder for native image and video understanding, activating roughly 11B parameters per token. The model supports a 256K context window and exposes selectable reasoning levels (high/medium/low), letting callers trade off speed, cost, and depth of reasoning. Designed for coding, agentic workflows, structured outputs, and long-context productivity tasks. Step 3.7 Flash runs on the Geek Hub API (OpenAI-compatible). Model id: stepfun/step-3.7-flash.
- Is Step 3.7 Flash free?
- No. Input is $0.218 per 1M tokens and output is $1.2536 per 1M tokens on Geek Hub (markup included).
- What is the context length of Step 3.7 Flash?
- Step 3.7 Flash has a 262k tokens context window. It supports up to 256,000 completion tokens.
- Does Step 3.7 Flash support tool calling and structured outputs?
- Step 3.7 Flash accepts tools and tool_choice for function calling. It also supports structured outputs via a JSON schema in response_format.
- When was Step 3.7 Flash released?
- Step 3.7 Flash was released on 2026-05-28.