Artificial Intelligence
StepFun
StepFun is an AI-native company in Artificial Intelligence, based in China. Shown below: 1 tool, 7 models.
CN
- Employees
- 400
- Valuation / employee
- $30M
- Tools
- 1
- Listed models
- 7
- Listed papers
- 5
Figures and classifications reflect imported catalog records, not live company reporting.
Tools
1 in the catalog
Models
7
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Step 3.7 Flash Gen 3 Multimodal
Step StepFun's flagship multimodal reasoning model, a 198B total parameter sparse MoE with 11B active parameters. Natively understands images and video, supports adjustable reasoning effort, and is optimized for agent a…
- Chatting
- Task automation
- Video analysis
- Coding
- Agents
- Image analysis
-
Step Image Edit 2 Gen 3 Multimodal
StepFun’s lightweight unified image generation and editing model. It supports both text-to-image and image editing through API endpoints, runs with under 6B parameters, and is designed for fast 1 to 2 second responses i…
- Images
- Image generation
- Visual imagery assistance
-
StepAudio 2.5 TTS Gen 3 Multimodal
StepFun’s contextual text-to-speech model with performance-oriented vocal control. It combines global and inline context guidance with zero-shot voice cloning so generated speech can follow broader style instructions as…
- Text to speech
- Voice cloning
- Dialect simulation
-
ACE-Step 1.5 XL (4B DiT) Gen 3 Multimodal
Step ACE-Step 1.5 XL is the 4B-parameter Diffusion Transformer decoder in the ACE-Step 1.5 music generation line, built for higher audio quality than the earlier 2B models. The release says it achieves the best scores a…
- Music production
- Audio
- Songwriting
-
Step 3.5 Flash Gen 7 Text
StepFun’s open source sparse MoE LLM, with 196B total parameters but 11B active per token, tuned for fast agentic reasoning, coding and long context work while staying efficient.
- Coding
- Writing
- Brainstorming
- Agents
-
ACE Step v1.5 Gen 4 Audio
Step ACE-STEP v1.5 is an open source, super fast music foundation model that uses a hybrid language model plus diffusion transformer pipeline to turn short prompts into multi minute songs, running on consumer GPUs with…
- Music
- Music lyrics
- Customer insights
-
Step-Audio-EditX Gen 4 Audio
A text-guided audio editor for speech, music, and effects. Describe the change and it performs precise, time-aligned edits with low latency.
- Video editing
- Video dubbing
- Music
In the catalogs
7
Papers
- Motion Transfer Across Subjects at Inference Motion4Motion, also called M4M, is a training free framework for transferring motion from a source video to a…
- Parametric Social Identity Injection and Diversification in Public Opinion Simulation Large language models (LLMs) have recently been adopted as synthetic agents for public opinion simulation, of…
Repositories
- NextStep-1 NextStep-1: Toward Autoregressive Image Generation with Continuous Tokens at Scale [ is our most capable open-source foundation model, engineered to deliver frontier reasoning and agentic capa…
- Step-Audio-R1 Jan 14, 2026: 🚀 We release the inference code and model weights of Nov 27, 2025: 🎉 We release the inference c…
- Step-Audio2 Sep 15, 2025: 👋 We release Sep 3, 2025: 👋 We release our Aug 29, 2025: 👋 We are pleased to open-source and th…
- Step1X-Edit [](https://replicate.com/zsxkib/step1x-edi…
Source rankings
Imported positions; not an independent quality score.
- Overall Rank#177
- AI Native Rank#52
- Rank#23