Grok 4.20
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
- xAI
- Organisation type
- Industry
- Country
- United States of America
- Published
- 17 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
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
- 500B
- Training data
- tokens
"This is just our V8 small foundation model, so 500B params" from Elon Musk on X (https://x.com/elonmusk/status/2023840935285760142?s=20) Likely sparse
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
How it is classified
Labels the source dataset applies when tracking notable models, and how confident it is in the entry.
- Why it is tracked
- Discretionary
- Record confidence
- Likely
Sources
Where this record came from and when it was last checked.
- Last updated
- 13 July 2026
What the numbers mean
Where it came from
Grok 4.20 was published by xAI, in the country recorded as United States of America, during February 2026. It comes out of an organisation categorised as industry.
It works in the domain of Language, and is recorded as performing the task of language modeling/generation.
This is a closed model: the trained values stayed with whoever produced them, and there is no local version to run.
Training and provenance
It is tracked in the underlying dataset for one reason in particular: discretionary.
Answers
Grok 4.20 — common questions
Grok 4.20— who created it?
It was published by xAI, based in United States of America, an organisation categorised as industry.
Grok 4.20— when was it released?
It was published in February 2026.
Grok 4.20— what is it used for?
It works in the domain of Language, and is recorded as handling the task of language modeling/generation. These are the areas it was designed around; they describe intent rather than a hard boundary.
Grok 4.20— what GPU do I need to run it?
None. This 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.
Grok 4.20— is it open source?
No. Its weights have not been published, so it exists only as a service controlled by its owner.
Grok 4.20— how many parameters does it have?
It has a parameter count of 500B. "This is just our V8 small foundation model, so 500B params" from Elon Musk on X (https://x.com/elonmusk/status/2023840935285760142?s=20) Likely sparse. 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.
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.