Model
Model explorer
Step-2
CLOSEDStepFun · Step-2 family · released Jul 1, 2024
First trillion-parameter MoE LLM from a Chinese firm; previewed March 2024, officially launched July 2024 at WAIC; Step-2-16k ranked 5th globally (1st in China) on LiveBench in Nov 2024, behind only OpenAI and Google models.
ReasoningCodingVisionFunction callingTool useAgentic
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Elo · unrated
Parameters
1000B
Active params
Undisclosed
Context
16K tokens
Architecture
Trillion-parameter Mixture-of-Experts (first from a Chinese firm)
License
Proprietary
Languages
2+
API price (in/out)
No hosted API
Modalities
text
Benchmark results
Bar shows position within the tracked field; marker = field best
Run it locally
Closed weights — available via API only. No local deployment.
Input / M tok
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Output / M tok
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Resources
API price — · each benchmark row carries its own source badge (see methodology)