Step 2 is StepFun's flagship language model, a large-scale system developed by the Beijing-based AI company founded by former Google and Baidu researchers. StepFun has positioned Step 2 as a frontier-tier model competitive with leading international offerings, with particular emphasis on multimodal understanding, long-context processing, and Chinese-language capability. The 16K context variant provides extended working memory suitable for multi-document analysis and complex dialogues.
Step 2 demonstrates strong performance across reasoning, code, mathematics, and image understanding tasks. StepFun's team focused on scaling compute and data quality simultaneously, and the model reflects an architecture designed for versatility across both Chinese and English content. It is relevant for enterprise deployments in China seeking frontier capability with domestic hosting.
Key Features
Frontier-tier language model from StepFun with multimodal understanding support
16K context window for extended document and conversation handling
Strong bilingual capability across Chinese and English
Competitive reasoning and mathematical problem-solving performance
Code generation and technical task support
Built by a team with deep expertise from Google Brain and Baidu research backgrounds
Ideal Use Cases
Enterprise AI applications in China requiring domestically hosted frontier capability
Complex bilingual research and document analysis tasks
Mathematical reasoning and scientific problem solving
Multimodal workflows combining text and image understanding
Example Prompts for Step 2 16K
Technical Specifications
| Provider | StepFun |
| Category | Text |
| Modality | Text -> Text |
| Context Window | 16K tokens |
Frequently Asked Questions
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