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StepFun has released the Step 5 Preview weights. According to information published by StepFun, the announcement was made on October 19, 2026, along with the news that it will hold a Step 5 Preview Launch Night and AI founders gathering with Together Compute on Thursday, October 22, in San Francisco. The event will feature the first unveiling of Step 5 Preview, a live Q&A, and a roundtable discussion on what is still worth building as AI models grow more capable, with Zhou Hongyu, Dan Fu, Mar Hershenson, Saoud Rizwan, and Joey Wang taking the stage. There are currently no further development facts, and the launch night has not yet taken place.
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StepFun Step 5 Preview weights released, launch night to be held in San Francisco on October 22Developments
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Oct 19
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StepFun Step 5 Preview weights released, launch night to be held in San Francisco on October 22
StepFun Step 5 Preview weights have been released, and StepFun will host the Step 5 Preview Launch Night and AI Founders Gathering with Together Compute on October 22 (Thursday) in San Francisco. The event will feature the first public appearance of Step 5 Preview, a live Q&A, and a roundtable discussion on what is still worth building as AI models grow more capable; Zhou Hongyu, Dan Fu, Mar Hershenson, Saoud Rizwan, and Joey Wang will take the stage.