Hunyuan
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AI Assistant
- Introduction
- StepFun offers frontier and voice AI models, an AI Studio for exploration, and an API platform for building applications and agentic workflows.
- Added on
- 10/16/2026
- Pricing
- Not specified
- Official links
- Website, company & support ↗
PRODUCT OVERVIEW
What is StepFun?
StepFun is an AI company providing frontier and voice models. Its Step 5 Preview model is positioned for complex work and agentic tasks, while the StepAudio 3 family covers speech recognition, real-time voice interaction, voice generation, text-to-speech, and music generation. Users can explore models directly in AI Studio or bring them into their own products and workflows through the API Platform, which also offers a monthly Flash Pro subscription for coding, development, and agentic workflows. Developers can access documentation, builder and startup programs, and a developer community. Model weights for Step 5 Preview are available on Hugging Face and GitHub.
How to use StepFun
- 1
Explore models in AI Studio
Open AI Studio to try StepFun models directly and see what they can do.
- 2
Build with the API Platform
Use StepFun APIs to bring frontier AI into your products and workflows.
- 3
Subscribe to Flash Pro
Choose the monthly Flash Pro plan for coding, development, and agentic workflows.
StepFun Features
Step 5 Preview frontier model for complex work and agentic tasks
StepAudio 3 family for speech recognition, real-time interaction, voice generation, text-to-speech, and music
AI Studio for exploring StepFun models
API Platform for integrating models into products and workflows
Monthly Flash Pro subscription for coding, development, and agentic workflows
Model weights available on Hugging Face and GitHub
StepFun Use Cases
Exploring frontier and voice AI models in AI Studio
Building AI applications with StepFun APIs
Running coding, development, and agentic workflows with Flash Pro
Adding speech recognition, text-to-speech, or music generation to products
Accessing open model weights for Step 5 Preview
StepFun FAQs
Step 5 Preview is described as StepFun's frontier model for complex work and agentic tasks. Its model weights are available on Hugging Face and GitHub.
The StepAudio 3 family includes Realtime for real-time voice interaction, TTS for speech synthesis, Gen for voice generation, Music for music generation, and ASR for speech recognition.
You can explore StepFun models in AI Studio and see what they can do.
Use the API Platform to bring frontier AI into your products and workflows.
Flash Pro is a monthly subscription described as one plan for coding, development, and agentic workflows.
Developer documentation is available on the API Platform at platform.stepfun.ai/docs.
Yes, the site lists a Builder Program and a Startup Program, along with a developer community.
A support contact page is available at platform.stepfun.com/docs/zh/guides/contact-us.
StepFun Official Information
- Company
- StepFun Intelligence Co., Ltd.
- Website
- https://stepfun.com/
- Documentation
- https://platform.stepfun.ai/docs/en/guides/basic-concepts
StepFun Pricing
The supplied pages mention a monthly Flash Pro subscription but do not list its price or detailed plan entitlements.
See the official website for current pricing.
COMMUNITY REVIEWS
StepFun User Reviews
No reviews yet.
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