Step 3.5 Flash
No estimate
No hardware requirements for this model
This model's weights are open, but no parameter count has been published for it. Every memory and speed figure starts from that number, so we would rather show nothing than a fabricated estimate.
On record
Full specification
Everything on record for this model. Most of it describes how it was trained rather than how it runs — useful context for judging how much work went into it, and how it compares with models built at a different scale.
Origin
Who built this model, where, and when it was published.
- Organisation
- StepFun
- Organisation type
- Industry
- Country
- China
- Published
- 2 February 2026
What it does
The problem areas the model was built for. A model can carry several of each.
- Domain
- Language
- Task
- Language modeling/generation, Question answering
Size
How large the model is and how much data it was trained on. Parameters are the figure that decides whether it fits on a given graphics card.
- Training data
- tokens
Availability
Whether you can obtain the model and run it on your own hardware, which is what decides if any of the graphics-card figures on this page apply.
- Weights
- Open — downloadable
- Model access
- Open weights (unrestricted)
How it is classified
Labels the source dataset applies when tracking notable models, and how confident it is in the entry.
- Record confidence
- Likely
Sources
Where this record came from and when it was last checked.
- Reference
- Step 3.5 Flash
- Last updated
- 8 April 2026
What the numbers mean
Background
Step 3.5 Flash was published by StepFun, in China, in February 2026. It comes out of industry.
It works in Language, and is recorded as doing language modeling/generation, Question answering.
The weights are published, so it can be downloaded and run on your own hardware indefinitely, offline, with no account attached.
Answers
Step 3.5 Flash — common questions
Who created Step 3.5 Flash?
Step 3.5 Flash was published by StepFun, based in China, categorised as industry.
When was Step 3.5 Flash released?
Step 3.5 Flash was published in February 2026.
What is Step 3.5 Flash used for?
Step 3.5 Flash works in Language, and is recorded as handling language modeling/generation, Question answering. A model can carry several of each, so these are the areas it was built for rather than a limit on what it will attempt.
Where can I download Step 3.5 Flash?
The weights for Step 3.5 Flash are published, though we do not hold a repository link for it. This site calculates hardware requirements rather than hosting model files.
What GPU do I need to run Step 3.5 Flash?
We cannot say. Step 3.5 Flash has open weights, but no parameter count has been published for it, and every memory and speed calculation starts from that number. We would rather show nothing than a fabricated estimate.
Is Step 3.5 Flash open source?
Its weights are published, so Step 3.5 Flash can be downloaded and run on your own hardware. Note that open weights is not the same as open source in the full sense — it says nothing about the training data, the training code, or the commercial terms attached.
How many parameters does Step 3.5 Flash have?
No parameter count has been published for Step 3.5 Flash, which is why no memory or speed figure appears on this page.
The other direction
Looking at it from the other side?
This page starts from the model. If you already own a card and want to know everything it will run, start from the hardware instead.