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Step 3.5 Flash is StepFun's most capable open-source foundation model. Built on a sparse Mixture of Experts (MoE) architecture, it selectively activates only 11B of its 196B parameters per token....
Best for
Price history
Local run command
# Refer to provider docs:
Presumptive Specs:
Typical GPU
12–24 GB VRAM
System RAM
16+ GB
Disk
20+ GB free
Runtime
Docker / local runtime
Community reliability estimate · not official
About this score: Community-estimated based on user reports and publicly available benchmark data (e.g. TruthfulQA). This is not an official score from the model provider. Scores may be inaccurate — always verify with the official leaderboard before making production decisions.
Input & output cost per 1M tokens over time
Price history is a Pro feature
Track pricing trends and catch price drops early.
Upgrade to Pro — $19/mo →Provider
Learn how to use StepFun: Step 3.5 Flash
💡 Tip: Start with the sample prompts above to see how StepFun: Step 3.5 Flash works best.
Proven prompts shared by the community for this model