Immediate trihead

Closed weights Brown University July 2001

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
Brown University
Organisation type
Academia
Country
United States of America
Published
6 July 2001
Authors
Eugene Charniak

What it does

The problem areas the model was built for. A model can carry several of each.

Domain
Language
Task
Language modeling

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

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
SOTA improvement

"The perplexity for both of these models significantly improve upon the trigram model base-line as well as the best previous grammar based language model" I don't see any standard benchmark that they claim SOTA on

Record confidence
Unknown
Citations
422

Sources

Where this record came from and when it was last checked.

Reference
Immediate-Head Parsing for Language Models
Last updated
28 November 2025

What the numbers mean

What this model is

Immediate trihead was published by Brown University, in the country recorded as United States of America, during July 2001. The category the publisher falls under is academia.

It works in the domain of Language, and is recorded as performing the task of language modeling.

Its weights were never published, so it can only be reached through its provider. No graphics card changes that.

Training and provenance

It is tracked in the underlying dataset for one reason in particular: sOTA improvement.

Answers

Immediate trihead — common questions

01

Immediate trihead— is it open source?

The licensing was never recorded in our source data. We treat unstated licensing as closed, because an unrecorded licence is not one to rely on.

02

Immediate trihead— how many parameters does it have?

No parameter count has been published for it, which is why no memory or speed figure appears on this page.

03

Immediate trihead— who created it?

It was published by Brown University, based in United States of America, an organisation categorised as academia.

04

Immediate trihead— when was it released?

It was published in July 2001. Capability per parameter has improved considerably since, so a newer model of the same size is often the better use of the same hardware.

05

Immediate trihead— what is it used for?

It works in the domain of Language, and is recorded as handling the task of language modeling. 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.

06

Immediate trihead— 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.

Source

Original publication

Record last updated 28 November 2025

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.