Step 3.7 Flash

ReasoningTool CallingAttachmentsOpen WeightsStructured Output

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...

Providers21

ReleasedMay 28, 2026

Input Modalitiestext, image, video

Output Modalitiestext

Tarsk Usecoding

Benchmarks

Available Providers (21)

Provider	Model ID	Input Cost	Output Cost	Context	Max Output
Kenari	`step-3-7-flash:free`	$0/MTok	$0/MTok	256K	256K
Kenari	`step-3-7-flash`	$0/MTok	$0/MTok	256K	256K
UnoRouter	`step-3.7-flash:free`	$0/MTok	$0/MTok	256K	256K
Nvidia	`stepfun-ai/step-3.7-flash`	$0/MTok	$0/MTok	256K	16.4K
Kilo Gateway	`stepfun/step-3.7-flash:free`	$0/MTok	$0/MTok	262.1K	262.1K
ZenMux	`stepfun/step-3.7-flash-free`	$0/MTok	$0/MTok	256K	256K
StepFun (Global)	`step-3.7-flash`	$0.18/MTok	$1.11/MTok	256K	256K
StepFun (China)	`step-3.7-flash`	$0.18/MTok	$1.11/MTok	256K	256K
Ambient	`stepfun/step-3.7-flash`	$0.19/MTok	$1.14/MTok	262.1K	262.1K
Requesty	`step-3.7-flash`	$0.20/MTok	$1.15/MTok	262.1K	256K
Hugging Face	`stepfun-ai/Step-3.7-Flash`	$0.20/MTok	$1.15/MTok	262.1K	256K
Vercel AI Gateway	`stepfun/step-3.7-flash`	$0.20/MTok	$1.15/MTok	256K	256K
EmpirioLabs AI	`step-3-7-flash`	$0.20/MTok	$1.15/MTok	256K	131.1K
Deep Infra	`stepfun-ai/Step-3.7-Flash`	$0.20/MTok	$1.15/MTok	262.1K	256K
Kilo Gateway	`stepfun/step-3.7-flash`	$0.20/MTok	$1.15/MTok	256K	230.4K
OpenRouter	`stepfun/step-3.7-flash`	$0.20/MTok	$1.15/MTok	262.1K	230.4K
ZenMux	`stepfun/step-3.7-flash`	$0.20/MTok	$1.15/MTok	256K	256K
Eden AI	`flexai/Step-3.7-Flash`	$0.20/MTok	$1.15/MTok	262.1K	256K
Eden AI	`deepinfra/stepfun-ai/Step-3.7-Flash`	$0.20/MTok	$1.15/MTok	262.1K	256K
StepFun Step Plan (China)	`step-3.7-flash`	—/MTok	—/MTok	256K	256K
StepFun Step Plan (Global)	`step-3.7-flash`	—/MTok	—/MTok	256K	256K

Capabilities

Reasoning

Tool Calling

Attachments

Open Weights

Structured Output