The AI Museum
AI Analytics1,072 recordsRecounted 23 September 2026

Closed-weight models from United States of America in 2021

21

Models

9 organisations

0%

Open weights

0 open, 21 closed

2

Frontier

By Epoch's flag

1.2T

Largest traceable

GLaM

2021

Span

14 with a traceable size

Releases

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

Records

21
Closed-weight models from United States of America in 2021, newest first. Each row links to the source Epoch AI records for it.
ModelOrganisationReleasedParametersWeights
GLaMGoogle2021-121.2TClosed
T-NLRv5 XXLMicrosoft2021-125BClosed
BASIC-LGoogle2021-113B *Closed
FlorenceMicrosoft2021-11893MClosed
NÜWAMicrosoft Research2021-11870MClosed
ViT-G/14 (LiT)Google Research2021-113BClosed
EveHarvard Medical School2021-1015M *Closed
Megatron-Turing NLG 530BMicrosoft2021-10530BClosed
FLAN 137BGoogle Research2021-09137BClosed
MEBMicrosoft2021-09135BClosed
Turing ULRv5Microsoft2021-092BClosed
W2v-BERTGoogle Brain2021-081BClosed
CodexOpenAI2021-0712B *Closed
ALIGNGoogle Research2021-06820MClosed
CoAtNetGoogle2021-062BClosed
Fold2SeqIBM2021-0612M *Closed
ViT-G/14Google Brain2021-062BClosed
Meta Pseudo LabelsGoogle Brain2021-03480M *Closed
DLWPUniversity of Washington2021-023MClosed
BigSSLGoogle2021-018B *Closed
DALL-EOpenAI2021-0112B *Closed

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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