Step 3.5 Flash
stepfun/step-3.5-flash
StepFun flash lane for quick multimodal reasoning and coding assistance
Capabilities
ReasoningYes
Tool callingYes
Structured outputNo
TemperatureSupported
AttachmentNo
Open weightsYes
Limits
Context256,000 tokens
Max input256,000 tokens
Max output256,000 tokens
Details
FamilyN/A
Knowledge cutoff2025-01
Release date2026-01-29
Last updated2026-02-13
Modalities
Inputtext
Outputtext
Benchmarks
Artificial Analysis Coding Index
31.6
index
SciCode
40.4
percent correct
Terminal-Bench Hard
27.3
success rate
SWE-Bench Verified
74.4
resolved
Community Rating
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Pricing
Cost per 1M tokens
InputN/A
OutputN/A