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stepfun · Active

step-3.5-flash

step family · launched 2026-02-11

ReasoningToolsStructured
AITopic score40.4Not yet ranked

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

Evidence coverage3%1 evaluations · 1 institutions
Context / maximum output262k / 262ktokens
Cache / input / output— · $0.1 · $0.3USD per million tokens
Value / freshness61.4 / 57relative value · release freshness
Product profile

What this model supports

Inputtext
Outputtext
Knowledge cutoffNot disclosed
WeightsProprietary / hosted
Capability profile

Strengths by domain

Coding—0 public results
Research & reasoning—0 public results
Professional work—0 public results
Knowledge & instruction—0 public results
Behind the score

Every result has a source

Raw results and standardized readings are shown together. Missing tests add neither points nor penalties.

Human preference & indices2 results

AA IndexArtificial Analysis60.29 indexReading 40.4

Imported from a directly fetched third-party leaderboard.

Configuration: step-3.5-flashOpen evidence
Arena TextLMArena1,402.6 EloReading 40.4

Direct LMArena text leaderboard result.

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