Stepfun
StepFun: Step 3.5 Flash
stepfun/step-3.5-flash
Input / M
Output / M
Context
Max Output
66K
Usage
Unranked
Quality
Unscored
Providers
1
Best Uptime 30m
100.00%
Released
Jan 29, 2026
Modalities
text
About
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....
Capabilities
Vision
Tools
Reasoning
Streaming
JSON Mode
Providers · 1
Per-provider pricing, uptime
| Provider | Input/M | Output/M | Context | Max Out | Quant | Uptime 30m |
|---|---|---|---|---|---|---|
| SiliconFlowRecommended SiliconFlow | stepfun/step-3.5-flash | $0.100 | $0.300 | 262K | 66K | fp8 | 100.00% |
Performance History
52 snapshots
Price History
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Versus
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First seen 3d ago · Last verified 19m ago