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Step-3.7-Flash

StepFun
Model overview

step-3.7-flash

StepFun's current open-weight multimodal flagship for reasoning, tool use, and long context.

general LLMreasoningcodingmultimodalvision-languagelong contextagentchatcode generationsoftware engineering agentlocal inferenceenterprise access
CompareCompanyRankingsPublic signals
Representative version

step-3.7-flash

CompanyStepFun
Release2026-05-29
Release typeModel release
Parameters198B / 11B active
ArchitectureNot disclosed
Context262,144
Input modalitiestext / image / video
Output modalitiestext / code / tool_call
Tool use / function callingConfirmed: Tool use, Function calling
Structured output / reasoningConfirmed: Reasoning
Vision / audio / videoConfirmed: Vision, Video
Open weights / LicenseWeights available / Apache-2.0 (license source pending verification)
stepfun-step-3-7-flash-current · License source pending verification
Vendor APIAvailable
Step-3.7-Flash launchstepfun-step-3-7-flash-current · 2026-05-29
OpenRouterOpenRouter listed
PricingOfficial · 2026-05-29: $0.2 / $1.15
OpenRouter · 2026-07-15: $0.2 / $1.15
input / output, per 1M tokens
BenchmarkNo reliable public source
Public signalsNo reliable public source
Use casesMultimodal agents / coding and review / Video understanding / local inference
Claim evidenceRelease / model specs / weightsStep-3.7-Flash launchstep-3.7-flash · 2026-05-29
OpenRouter

Pricing / context / availability

OpenRouterOpenRouter listed
OpenRouter listingstepfun/step-3.7-flash
Mapped versionstep-3.7-flash
stepfun-step-3-7-flash-current
PricingOfficial · 2026-05-29: $0.2 / $1.15
OpenRouter · 2026-07-15: $0.2 / $1.15
input / output, per 1M tokens
Context256000
Speed/LatencyNo reliable public source
Snapshot time2026-07-15T20:11:41.551Z
SourceView source
Evidence gaps

Public display boundary

No reliable benchmark sourceNo public model-card activity countersNo linkable real reviewSpeed/latency not disclosed