Step 3.5 Flash 2603

stepfun/step-3.5-flash-2603

StepFun flash model for efficient multimodal reasoning, coding, and tool use

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Context window: 256K
Input: Text
Output: Text
Released: 2026-04-02

Max output: 256K
Knowledge cutoff: 2025-01
Weights: Open
Capabilities: Open weight, Reasoning, Temperature, Tool call

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Performance

Overall capability

46.4/100

Coding: —
Reasoning: 46.1
Professional work: —
Knowledge & language: 51.2


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ModelRegistry · Catalog updated 2026-11-05