Unverified50% confidenceReleaseExact time
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.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
9/23/2026
First Seen
Valid until: 12/22/2026
Sources
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