StepFun
Step 3.5 Flash 2603
StepFun flash model for efficient multimodal reasoning, coding, and tool use
stepfun/step-3.5-flash-2603
Context
256K
Output
256K
Released
2026-04-02
Knowledge cutoff
2025-01
Types
InputText
OutputText
Reasoning
Supported
Tool use
Supported
Structured output
—
Attachments
—
Open weights
Supported
Provider pricing
No providers currently list this model.
Benchmarks
Artificial Analysis Coding Index
34.6 · index
SciCode
38.5 · percent correct
Terminal-Bench Hard
32.6 · success rate