The AI Museum
AI Analytics1,072 recordsRecounted 23 September 2026

Closed-weight models from United States of America in 2018

11

Models

7 organisations

0%

Open weights

0 open, 11 closed

0

Frontier

By Epoch's flag

5B

Largest traceable

Mesh-TensorFlow Transformer 4.9B (language)

2018

Span

5 with a traceable size

Releases

by month
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sept
Oct
Nov
Dec

Records

11
Closed-weight models from United States of America in 2018, newest first. Each row links to the source Epoch AI records for it.
ModelOrganisationReleasedParametersWeights
SPN (ImageNet 128)Google Brain2018-12250MClosed
Mesh-TensorFlow Transformer 2.9B (translation)Google Brain2018-113B *Closed
Mesh-TensorFlow Transformer 4.9B (language)Google Brain2018-115BClosed
TrellisNetCarnegie Mellon University (CMU)2018-10180MClosed
Transformer + Simple Recurrent UnitASAPP2018-0990MClosed
AWD-LSTM-MoS+PDR + dynamic evaluation (WT2)IBM2018-0835MClosed
Dropout-LSTM+Noise(Bernoulli) (WT2)Columbia University2018-0551M *Closed
YOLOv3University of Washington2018-0457M *Closed
4 layer QRNN (h=2500)Salesforce Research2018-03151M *Closed
QRNNSalesforce Research2018-02135M *Closed
T-DMCAGoogle Brain2018-01Closed

An asterisk marks a parameter figure the source does not consider traceable to the people who built the model. That judgement is the source’s and it has false negatives: Kimi K3 is marked speculative at 2.8T while Moonshot’s own model card states the figure. Why that distinction carries the whole exhibit.

Counts are of models Epoch AI records as notable, not of every model released. The most recent month is always incomplete, because a model enters the dataset when it is reviewed rather than when it ships.

Epoch AI, 'Data on AI Models'. Published online at epoch.ai. Retrieved from 'https://epoch.ai/data/ai-models-documentation' Used under CC BY 4.0.

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