Step-3.5-Flash
Official · Unknown · unknown
| Precision / quantization | Format | Bits | Publisher trust | Deployment state |
|---|
StepFun · Flash · step-3-5
Step-3.5-Flash: Specs, GPU requirements, hosting & deployment
Step-3.5-Flash is a recent Flash release in the StepFun family, certified from its immutable official source revision.
Reference only
Compare this model
Total parametersThe manufacturer has not published this information.
Active parametersDense model
Context windowN/A / Not directly comparable
Release statusRecent · Recent
Architecture
ModalitiesText
Licenseapache-2.0
Deployment stateReference only
Commercial stateCommercial Use Allowed
Release date
Architecture, strengths and use cases
Step-3.5-Flash is an official self-hostable StepFun release in the StepFun Flash track. It uses The manufacturer has not published this information., carries The manufacturer has not published this information., supports a verified context window of 0 tokens, and exposes only source-certified checkpoints and runtime combinations. Its release, license and deployment facts are tied to the official repository revision rather than inferred from the family name.
Step-3.5-Flash uses The manufacturer has not published this information. with The manufacturer has not published this information.. The stored architecture profile records layers, hidden width , attention heads and a 0 token context ceiling where the official configuration publishes those fields.
Verified The manufacturer has not published this information. architecture
Official checkpoint and pipeline evidence
Official Unknown checkpoint coverage
Private LLM inference
Agentic workflows
Long-context document processing
Certified checkpoints and quantizations
Only exact, source-certified variants attached to this release are shown.
Recommended hardware
Use only the listed certified runtime configuration with the exact checkpoint precision. The recommendation engine checks weight memory, KV cache, runtime overhead, safety headroom, GPU architecture and topology before ranking rentable and reference hardware.
Reference only
The official license permits commercial use; its obligations still apply.
License and self-hosting considerations
The full 0B resident weight set must fit across the selected GPUs. Context and concurrency add KV-cache memory; MoE active parameters do not replace resident-weight memory.
Step-3.5-Flash is published under apache-2.0. The release-scoped official license link and verification date are retained with the catalogue record.
Commercial Use Allowed. The official license permits commercial use; its obligations still apply.
Alternatives and sibling variants
Step-3.7-Flash, Step-3.7-Flash-GGUF, Step-3.7-Flash-NVFP4, Step-3.7-Flash-FP8, Step-3.5-Flash-FP8, Step 3.7 Flash, Step 3.5 Flash
Release timeline
stepfun/stepfun/step-35-flash
Source details
Source revision: 4af706d08154a632d5497e8fbc66558132b6245ada0ad125a6f4a312443b30ea
stepfun-ai/Step-3.5-Flash @ 2026-07-10T12:06:23Z
Frequently asked questions
How much VRAM does Step-3.5-Flash require?
The exact estimate depends on checkpoint precision, context and concurrency; the page recommendation uses the certified memory engine and compatible runtime configurations.
Which runtimes support Step-3.5-Flash?
No runtime is presented as supported until upstream evidence is verified.
Can Step-3.5-Flash be used commercially?
The stored commercial classification is Commercial Use Allowed. Consult the official apache-2.0 terms for the final obligations.
Official references
Last verified: 2026-09-03