The AI Museum
AI Analytics1,072 recordsRecounted 23 September 2026

Closed-weight language models in 2020

13

Models

11 organisations

0%

Open weights

0 open, 13 closed

3

Frontier

By Epoch's flag

175B

Largest traceable

GPT-3 175B (davinci)

2020

Span

8 with a traceable size

Releases

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

Records

13
Closed-weight language models in 2020, newest first. Each row links to the source Epoch AI records for it.
ModelOrganisationReleasedParametersWeights
CT-MoS (WT2)Google2020-1245MClosed
KEPLERTsinghua University2020-11125MClosed
DeLighTUniversity of Washington2020-0899M *Closed
GShard (dense)Google2020-062BClosed
GPT-3 175B (davinci)OpenAI2020-05175BClosed
NAS+ESS (23M)Northeastern University (China)2020-0523MClosed
TransformerXL + spectrum controlUniversity of California Los Angeles (UCLA)2020-03151M *Closed
Feedback TransformerLORIA2020-02126M *Closed
FFN SwiGLUGoogle2020-02220MClosed
TaLK ConvolutionCarleton University2020-02240M *Closed
TCAN (WT2)Nanjing University2020-0233MClosed
Turing-NLGMicrosoft2020-0217B *Closed
MeenaGoogle Brain2020-013BClosed

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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