Step 3.5 Flash
unknownStepfun
StepFun flash lane for quick multimodal reasoning and coding assistance
Limits
Context256,000
Input256,000
Output256,000
Modalities
Inputtext
Outputtext
Release info
Release2026-01-29
Last update2026-02-13
Knowledge cutoff2025-01
Provider offerings
Provider-specific prices and limits stay separate from canonical model facts.
| Provider | Provider model ID | Input | Output | Context | Output limit |
|---|---|---|---|---|---|
| EmpirioLabs AI | step-3-5-flash | $0.1 / 1M | $0.3 / 1M | 256,000 | 131,072 |
| StepFun Step Plan (Global) | step-3.5-flash | Unknown | Unknown | 256,000 | 256,000 |
| StepFun (China) | step-3.5-flash | $0.1 / 1M | $0.3 / 1M | 256,000 | 256,000 |
| StepFun Step Plan (China) | step-3.5-flash | Unknown | Unknown | 256,000 | 256,000 |
| StepFun (Global) | step-3.5-flash | $0.1 / 1M | $0.3 / 1M | 256,000 | 256,000 |
| NanoGPT | stepfun-ai/step-3.5-flash | $0.2 / 1M | $0.5 / 1M | 256,000 | 256,000 |
| Nvidia | stepfun-ai/step-3.5-flash | $0 / 1M | $0 / 1M | 256,000 | 16,384 |
| SiliconFlow (China) | stepfun-ai/Step-3.5-Flash | $0.1 / 1M | $0.3 / 1M | 262,000 | 262,000 |
| Hugging Face | stepfun-ai/Step-3.5-Flash | $0.1 / 1M | $0.3 / 1M | 262,144 | 256,000 |
| SiliconFlow | stepfun-ai/Step-3.5-Flash | $0.1 / 1M | $0.3 / 1M | 262,000 | 262,000 |
| OpenRouter | stepfun/step-3.5-flash | $0.1 / 1M | $0.3 / 1M | 262,144 | 65,536 |
| Qiniu | stepfun/step-3.5-flash | Unknown | Unknown | 64,000 | 4,096 |
| ZenMux | stepfun/step-3.5-flash | $0.1 / 1M | $0.3 / 1M | 256,000 | 64,000 |
| Vercel AI Gateway | stepfun/step-3.5-flash | $0.09 / 1M | $0.3 / 1M | 262,114 | 262,114 |
| Kilo Gateway | stepfun/step-3.5-flash | $0.1 / 1M | $0.3 / 1M | 262,144 | 256,000 |
Capabilities
Attachments
No
Reasoning
Yes
Tool calling
Yes
Structured output
Unknown
Temperature
Yes