FFree
StepfunOpen Weights

Step 3.5 Flash 2603

step-3-5-flash-2603

Best Input Price

$0.00 / 1M

StepFun flash model for efficient multimodal reasoning, coding, and tool use

Context Window

262,144 tokens

Reasoning

Supported

Tool Calling

Supported

Released

2026-04-02

Inference Providers (5)

ProviderModel IDContextInput / 1MOutput / 1MAction
StepFun Step Plan (Global)step-3.5-flash-2603256,000$0.00$0.00Docs ↗
StepFun Step Plan (China)step-3.5-flash-2603256,000$0.00$0.00Docs ↗
EmpirioLabs AIstep-3-5-flash-2603256,000$0.10$0.30Docs ↗
NanoGPTstepfun-ai/step-3.5-flash-2603262,144$0.10$0.30Docs ↗
StepFun (China)step-3.5-flash-2603256,000$0.10$0.30Docs ↗