StepFun flash model for efficient multimodal reasoning, coding, and tool use
Details
| Field | Value |
|---|---|
| id | stepfun-ai/Step-3.5-Flash |
| family | step |
| modality | text->text |
| context_length | 262000 |
| max_output_tokens | 262000 |
| release_date | 2026-02-11 |
| is_open_weights | no |
| supports_tool_call | yes |
| supports_reasoning | yes |
| supports_structured_output | yes |
| supports_attachment | no |
| input_modalities | text |
| output_modalities | text |