codex-mini
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
- Organisation type
- Industry
- Country
- United States of America
- Published
- 16 May 2025
What it does
The problem areas the model was built for. A model can carry several of each.
- Domain
- Language
- Task
- Code generation
- Base model
- o4-mini
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
- API access
- Training code
- Unreleased
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
- Introducing Codex
- Last updated
- 28 November 2025
What the numbers mean
What this model is
codex-mini was published by OpenAI, in United States of America, in May 2025. industry is the category the publisher falls under.
It works in Language, and is recorded as doing code generation.
It is derived from o4-mini rather than trained from scratch, which is the usual way a specialised model is produced.
Because the weights are not available, none of the hardware figures elsewhere on this site apply to it.
Answers
codex-mini — common questions
Who created codex-mini?
codex-mini was published by OpenAI, based in United States of America, categorised as industry.
When was codex-mini released?
codex-mini was published in May 2025.
What is codex-mini used for?
codex-mini works in Language, and is recorded as handling code generation. These are the areas it was designed around; they describe intent rather than a hard boundary.
What GPU do I need to run codex-mini?
None. codex-mini 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 codex-mini open source?
No. codex-mini has not had its weights published, so it exists only as a service controlled by its owner.
How many parameters does codex-mini have?
No parameter count has been published for codex-mini, 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.