阶跃星辰
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Introduction
StepFun is dedicated to developing proprietary super models, offering Step series language, speech, and multimodal models to help build AI applications.
Listed on
July 22, 2026
What is 阶跃星辰?
StepFun is an AI company founded in April 2023, focusing on proprietary super models. It has completed the development of a hundred-billion-parameter language large model and multimodal large model. Its products include Step series models (such as Step 3.7 Flash, Step 3.5 Flash, etc.) as well as the Step AI application and open platform, providing APIs for developers to integrate.
How to use 阶跃星辰?
- Users can learn about the product by visiting the official website, register for the open platform to obtain an API key, and then integrate the Step API into their applications. For end users, they can download the Step AI application (Mac, Windows, iOS, Android) or use the web version. Developers can refer to the documentation center for development.
Core features of 阶跃星辰
- Proprietary super models, including language, speech, and multimodal models
- Step API provides stable, high-performance, and easy-to-integrate interfaces
- Supports Agent workflows with stable tool calling
- Native multimodal visual understanding, parsing PDFs, tables, charts, etc.
- Flagship capabilities open-sourced, deployable, customizable, and fine-tunable
- Provides an open platform and Studio, connecting models, tools, and workflows
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