StepFun
A Chinese AI research organization focused on developing large-scale language models and multimodal models, known for producing the Step series of flagship models.
Timeline (last 90 days)
StepFun released the Step 5 Preview model as open weights.
StepFun positions Step 5 Preview as a base model for long-horizon agentic tasks.
StepFun officially released its flagship model Step-5-Preview.
Step-5-Preview is positioned as a flagship product for agentic work and reaches the frontier in two major domains, software engineering and professional knowledge work, with particular emphasis on performance in financial scenarios.
StepFun's official charts claim that Step5 Preview is benchmarked against GLM-5.3 and comparable Qwen models, with per-task costs reduced by approximately 65%.
StepFun has stated that it will release the open-source weights for Step5 on October 15.
StepFun Step5 Preview is a 600-billion-parameter MoE model with only 27 billion activated parameters, supporting visual data processing and a million-level token context window.
All Facts (6)
StepFun positions Step 5 Preview as a base model for long-horizon agentic tasks.
50%UnverifiedStep-5-Preview is positioned as a flagship product for agentic work and reaches the frontier in two major domains, software engineering and professional knowledge work, with particular emphasis on performance in financial scenarios.
50%UnverifiedStepFun's official charts claim that Step5 Preview is benchmarked against GLM-5.3 and comparable Qwen models, with per-task costs reduced by approximately 65%.
50%UnverifiedStepFun released the Step 5 Preview model as open weights.
50%UnverifiedStepFun officially released its flagship model Step-5-Preview.
50%UnverifiedStepFun Step5 Preview is a 600-billion-parameter MoE model with only 27 billion activated parameters, supporting visual data processing and a million-level token context window.
50%