Grok 4.5
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
- 8 July 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.
- Parameters
- 1.5T
- Training data
- tokens
SpaceXAI CEO Elon Musk stated on X that Grok 4.5 would have 1.5 trillion parameters, presumably meaning total parameters https://x.com/elonmusk/status/2071184354756477041?s=20
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.
- Record confidence
- Likely
Sources
Where this record came from and when it was last checked.
- Reference
- Grok 4.5
- Last updated
- 21 July 2026
What the numbers mean
Background
Grok 4.5 was published by xAI, in United States of America, in July 2026. The organisation is categorised as industry.
It works in Language, and is recorded as doing language modeling/generation, Question answering.
Its weights were never published, so it can only be reached through its provider. No graphics card changes that.
Answers
Grok 4.5 — common questions
Who created Grok 4.5?
Grok 4.5 was published by xAI, based in United States of America, categorised as industry.
When was Grok 4.5 released?
Grok 4.5 was published in July 2026.
What is Grok 4.5 used for?
Grok 4.5 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.
What GPU do I need to run Grok 4.5?
None. Grok 4.5 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 Grok 4.5 open source?
No. Grok 4.5 has not had its weights published, so it exists only as a service controlled by its owner.
How many parameters does Grok 4.5 have?
Grok 4.5 has 1.5T parameters. SpaceXAI CEO Elon Musk stated on X that Grok 4.5 would have 1.5 trillion parameters, presumably meaning total parameters https://x.com/elonmusk/status/2071184354756477041?s=20. 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.