All Models

Step 3.7 Flash (Free)

Reasoning Tool Calling Attachments Open Weights

Newer StepFun flash model for faster agents, coding, and multimodal prompts

Providers 2
Released May 29, 2026
Input Modalities text, image, video
Output Modalities text
Tarsk Use coding

Available Providers (2)

Provider Model ID Input Cost Output Cost Context Max Output Docs
ZenMux stepfun/step-3.7-flash-free $0/MTok $0/MTok 256K 256K
Kilo Gateway stepfun/step-3.7-flash:free $0/MTok $0/MTok 262.1K 262.1K

Capabilities

Reasoning
Tool Calling
Attachments
Open Weights
Structured Output