Step 5 Preview from
@StepFun_ai is live on DeepInfra, day zero.
600B open-weight MoE, 27B active. 1M context, text + vision. FP8.
$1.00 in / $2.70 out / $0.05 cached per 1M tokens.
Built for long-horizon agents: coding, frontend, finance.
What would you load into 1M tokens first?