StepFun: Step 3.5 Flash
stepfun/step-3.5-flash
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....
Modalities
In / Out Price
$0.10 / $0.30 per 1M
Context
262K
Released
Jan 29, 2026
Knowledge Cutoff
—
Uptime
Share of successful requests per carrier, measured over the last 5 minutes, 30 minutes and day. When one carrier dips, the router fails over to the next.
Carriers
1
Best carrier, 30m
100.00%
Healthy now
1 / 1
| Provider | Status | Last 5m | Last 30m | Last day |
|---|---|---|---|---|
 SiliconFlow | Operational | — | 100.00% | 100.00% |