The AI Museum
AI Analytics1,072 recordsRecounted 23 September 2026

Closed-weight models in 2020

Weightsopenclosedunknownfrontier only
Year20262025202420232022202120202019201820172016
2 filters active, showing 22 of 1,072 recordsClear all

22

Models

13 organisations

0%

Open weights

0 open, 22 closed

3

Frontier

By Epoch's flag

175B

Largest traceable

GPT-3 175B (davinci)

2020

Span

11 with a traceable size

Releases

by month
Jan
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Organisation

Country

Domain

Records

22
Closed-weight 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
Conformer + Wav2vec 2.0 + Noisy StudentGoogle2020-101BClosed
DeLighTUniversity of Washington2020-0899M *Closed
GShard (dense)Google2020-062BClosed
ConformerGoogle2020-05119MClosed
ContextNetGoogle2020-05113M *Closed
GPT-3 175B (davinci)OpenAI2020-05175BClosed
NAS+ESS (23M)Northeastern University (China)2020-0523MClosed
Go-exploreUber AI2020-04—Closed
Agent57DeepMind2020-03—Closed
MetNetGoogle2020-03225M *Closed
TransformerXL + spectrum controlUniversity of California Los Angeles (UCLA)2020-03151M *Closed
Feedback TransformerLORIA2020-02126M *Closed
FFN SwiGLUGoogle2020-02220MClosed
Perceiver IO (optical flow)DeepMind2020-0228MClosed
TaLK ConvolutionCarleton University2020-02240M *Closed
TCAN (WT2)Nanjing University2020-0233MClosed
Turing-NLGMicrosoft2020-0217B *Closed
AlphaFoldDeepMind2020-0116M *Closed
ContextNet + Noisy StudentGoogle2020-01—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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