StepFun open-sources Step 5, a 600B model that runs on 8 GPUs
StepFun released the Step 5 Preview weights on Hugging Face as promised. The 600B MoE model runs in FP8 on a single 8-GPU H200 server.
StepFun News and Analysis
5 verified stories covering StepFun, product updates and industry developments.
StepFun Launches Step 5 Preview, Claims Cost 1/8 of Opus 5
StepFun's new Step 5 Preview MoE model claims a top-three open-weight benchmark score and a cost one-eighth of Claude Opus 5, with full weights due October 15.
StepFun ships five voice models, word error rate hits 1.7%
StepFun launched five StepAudio 3 models in one day, topping Artificial Analysis leaderboards for real-time dialogue and speech reasoning, with ASR hitting a 1.7% word error rate.
STEPX Neo shows StepFun’s first AI agent phone before price and specs are public
STEPX Neo shows StepFun’s first AI agent phone before price and specs are public. The piece reviews the verified facts and why the signal matters beyond one announcement.
Nubia agent phone set for WAIC reveal
Nubia agent phone set for WAIC reveal is reframed for global technology readers, with the key numbers, product claims and open questions kept intact.