Step-1.5V
No estimate
No hardware requirements for this model
The weights for this model have not been published, so it cannot be downloaded or run on your own hardware at any size. It is reachable only through its provider, and no graphics card changes that.
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
- 1 March 2024
What it does
The problem areas the model was built for. A model can carry several of each.
- Domain
- Vision
- Task
- Visual 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.
- Parameters
- 100B
- Training data
- tokens
How it is classified
Labels the source dataset applies when tracking notable models, and how confident it is in the entry.
- Record confidence
- Unknown
Sources
Where this record came from and when it was last checked.
- Reference
- 100天后，阶跃星辰交出了第二份答卷
- Last updated
- 28 November 2025
What the numbers mean
Background
Step-1.5V was published by StepFun, in China, in March 2024. It comes out of industry.
It works in Vision, and is recorded as doing visual question answering.
Its weights were never published, so it can only be reached through its provider. No graphics card changes that.
Answers
Step-1.5V — common questions
What is Step-1.5V used for?
Step-1.5V works in Vision, and is recorded as handling visual question answering. Models frequently carry more than one of each, and the tags describe purpose rather than capability limits.
What GPU do I need to run Step-1.5V?
None. Step-1.5V is a closed model — its weights were never published, so it cannot be downloaded or run on your own hardware at any price. It is reachable only through its provider.
Is Step-1.5V open source?
The licensing for Step-1.5V was never recorded in our source data. We treat unstated licensing as closed, because an unrecorded licence is not one to rely on.
How many parameters does Step-1.5V have?
Step-1.5V has 100B parameters. That figure is the total, and it is what decides how much memory the model needs — roughly half a gigabyte per billion at the compression most people use.
Who created Step-1.5V?
Step-1.5V was published by StepFun, based in China, categorised as industry.
When was Step-1.5V released?
Step-1.5V was published in March 2024. Capability per parameter has improved considerably since, so a newer model of the same size is often the better use of the same hardware.
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.