GPT-4b micro
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
- OpenAI,Retro Biosciences
- Organisation type
- Industry,Industry
- Country
- United States of America
- Published
- 17 January 2025
- Authors
- John Hallman, Rico Meinl
What it does
The problem areas the model was built for. A model can carry several of each.
- Domain
- Biology
- Task
- Protein generation, Proteins, Protein or nucleotide language model (pLM/nLM)
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
- Closed — provider access only
- Model access
- Unreleased
- Training code
- Unreleased
Outside scientists won’t be able to tell if the results are real until they’re published, something the companies say they are planning. Nor is the model available for wider use—it’s still a bespoke demonstration, not an official product launch.
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
- OpenAI’s new model, called GPT-4b micro, was trained to suggest ways to re-engineer the protein factors to increase their function.
- Last updated
- 28 November 2025
What the numbers mean
What this model is
GPT-4b micro was published by OpenAI,Retro Biosciences, in United States of America, in January 2025. It comes out of industry,Industry.
It works in Biology, and is recorded as doing protein generation, Proteins, Protein or nucleotide language model (pLM/nLM).
Its weights were never published, so it can only be reached through its provider. No graphics card changes that.
Answers
GPT-4b micro — common questions
What GPU do I need to run GPT-4b micro?
None. GPT-4b micro 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 GPT-4b micro open source?
No. GPT-4b micro has not had its weights published, so it exists only as a service controlled by its owner.
How many parameters does GPT-4b micro have?
No parameter count has been published for GPT-4b micro, which is why no memory or speed figure appears on this page.
Who created GPT-4b micro?
GPT-4b micro was published by OpenAI,Retro Biosciences, based in United States of America, categorised as industry,Industry.
When was GPT-4b micro released?
GPT-4b micro was published in January 2025.
What is GPT-4b micro used for?
GPT-4b micro works in Biology, and is recorded as handling protein generation, Proteins, Protein or nucleotide language model (pLM/nLM). These are the areas it was designed around; they describe intent rather than a hard boundary.
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.