All Models

Step-3

Reasoning Tool Calling Attachments
Providers 2
Released Jul 31, 2025
Input Modalities image, text
Output Modalities text
Tarsk Use coding

Available Providers (2)

Provider Model ID Input Cost Output Cost Context Max Output Docs
ZenMux stepfun/step-3 $0.21/MTok $0.57/MTok 65.5K 64K
NanoGPT step-3 $0.25/MTok $0.65/MTok 65.5K 8.2K

Capabilities

Reasoning
Tool Calling
Attachments
Open Weights
Structured Output