BigChaos OptiBlend
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
- AT&T
- Organisation type
- Industry
- Country
- United States of America
- Published
- 1 August 2009
- Authors
- A Töscher, M Jahrer, RM Bell
What it does
The problem areas the model was built for. A model can carry several of each.
- Domain
- Recommendation
- Task
- Movie ratings
- Numerical format
- FP32
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
"Netflix provided a training data set of 100,480,507 ratings that 480,189 users gave to 17,770 movies."
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
- Citations
- 237
won Netflix prize
Sources
Where this record came from and when it was last checked.
- Reference
- The BigChaos Solution to the Netflix Grand Prize
- Last updated
- 28 November 2025
What the numbers mean
Where it came from
BigChaos OptiBlend was published by AT&T, in United States of America, in August 2009. It comes out of industry.
It works in Recommendation, and is recorded as doing movie ratings.
Because the weights are not available, none of the hardware figures elsewhere on this site apply to it.
How it was trained
Its inclusion criterion is sOTA improvement.
Answers
BigChaos OptiBlend — common questions
Is BigChaos OptiBlend open source?
The licensing for BigChaos OptiBlend was never recorded in our source data. We treat unstated licensing as closed, because an unrecorded licence is not one to rely on.
How many parameters does BigChaos OptiBlend have?
No parameter count has been published for BigChaos OptiBlend, which is why no memory or speed figure appears on this page.
Who created BigChaos OptiBlend?
BigChaos OptiBlend was published by AT&T, based in United States of America, categorised as industry.
When was BigChaos OptiBlend released?
BigChaos OptiBlend was published in August 2009. Capability per parameter has improved considerably since, so a newer model of the same size is often the better use of the same hardware.
What is BigChaos OptiBlend used for?
BigChaos OptiBlend works in Recommendation, and is recorded as handling movie ratings. These are the areas it was designed around; they describe intent rather than a hard boundary.
What GPU do I need to run BigChaos OptiBlend?
None. BigChaos OptiBlend 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.
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.