Open-weight & owned stack · Open lab releases

StepFun previews 600-billion-parameter Step 5

Sep 20, 2026. Covered by 4 outlets.

StepFun previewed a 600-billion-parameter sparse mixture-of-experts model with a one-million-token context window and planned October open-weight release.

Read the original at datastudios.orgOpens the publisher's site in a new tab

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