NextStep

by StepFun

About the model:

Image generation model by StepFun.

Model type:

Image

Model performance class:

Full

Link to the model:

https://huggingface.co/stepfun-ai/NextStep-1-Large

Base models:

NextStep-1-Large-Pretrain

End model:

NextStep-1-Large

End model license:

Apache-2.0

About the organisation:

StepFun, a Chinese AI company.

Link to the organisation:

https://www.stepfun.com/

Model release date:

August 2025

Availability

Base Model Data

Data sources described only in abstract.

End User Model Data

Data sources described only in abstract.

Base Model Weights

Weights made available through HuggingFace.

https://huggingface.co/stepfun-ai/NextStep-1-Large-Pretrain

End User Model Weights

Weights made available through HuggingFace.

https://huggingface.co/stepfun-ai/NextStep-1-Large

Training Code

Github available, however does not (yet) contain training code.

https://github.com/stepfun-ai/NextStep-1

Documentation

Code Documentation

No training code, so no documentation (yet).

Hardware Architecture

Partial hardware architecture information provided in paper.

https://arxiv.org/pdf/2508.10711

Preprint

Preprint made available through arXiv.

https://arxiv.org/pdf/2508.10711

Paper

Paper peer-reviewed at ICLR 2026.

https://openreview.net/forum?id=Ndnwg9oOQO

Modelcard

Model card contains minimal information.

https://huggingface.co/stepfun-ai/NextStep-1-Large

Datasheet

No datasheet found.

Access

Licenses

Apache-2.0, an OSI-approved license.

https://huggingface.co/stepfun-ai/NextStep-1-Large

Is this information not up to date?

Contribute here ->

Supported by the Centre for Language Studies and the Dutch Research Council. Website design & development © 2024 by BSTN. This version of the index generated 09 April 2026, website content last updated 11 March 2026.