Step 3.5 Flash
by StepFun · 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....
- Input / 1M tokens
- $0.10
- Output / 1M tokens
- $0.30
- Context
- 262K
Specs
| Input price | $0.10 / 1M tokens |
|---|---|
| Output price | $0.30 / 1M tokens |
| Context window | 262K tokens |
| Max output | 65.5K tokens |
| Reads | text |
| Writes | text |
| Tool calling | Yes |
| Reasoning | Yes |
| Listed | Jan 29, 2026 |
List prices in USD, updated Oct 30, 2026. Providers may charge differently.
Providers
1 provider serves this model, as of Oct 30, 2026, 18:12 UTC.
| Provider | Quantization | Context | Max output | Input / 1M | Output / 1M | Uptime (30 min) | Latency (median) | Throughput (median) | Supports | Status |
|---|---|---|---|---|---|---|---|---|---|---|
| SiliconFlow | fp8 | 262K | 65.5K | $0.10 | $0.30 | 100% | 1.08 s | 76 tok/s | Normal |
"Cheapest" is the lowest input plus output price; "Fastest" the highest median throughput. Columns empty for every provider are not shown.
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