Kaiju Small
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
- Character.ai
- Organisation type
- Industry
- Country
- United States of America
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
- 13B
- Training data
- tokens
"The Kaiju family of models comes in 3 production variants: Small (13B), Medium (34B), and Large (110B)."
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
- Hosted access (no API)
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
- Significant use
- Record confidence
- Likely
Reasonbly inferred from MAU figures like 20 million in early 2025 (https://blog.character.ai/harnessing-data-at-scale-character-ais-transition-to-warpstream/ )
Sources
Where this record came from and when it was last checked.
- Reference
- Inside Kaiju
- Last updated
- 8 April 2026
What the numbers mean
Background
Kaiju Small was published by Character.ai, in United States of America. industry is the category the publisher falls under.
It works in Language, and is recorded as doing language modeling/generation.
Its weights were never published, so it can only be reached through its provider. No graphics card changes that.
How it was trained
Its inclusion criterion is significant use.
Answers
Kaiju Small — common questions
How many parameters does Kaiju Small have?
Kaiju Small has 13B parameters. "The Kaiju family of models comes in 3 production variants: Small (13B), Medium (34B), and Large (110B).". 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 Kaiju Small?
Kaiju Small was published by Character.ai, based in United States of America, categorised as industry.
What is Kaiju Small used for?
Kaiju Small works in Language, and is recorded as handling language modeling/generation. 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 Kaiju Small?
None. Kaiju Small 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 Kaiju Small open source?
No. Kaiju Small has not had its weights published, so it exists only as a service controlled by its owner.
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.