The AI Museum
AI Analytics1,072 recordsRecounted 23 September 2026

Frontier models from United States of America in 2019

9

Models

6 organisations

56%

Open weights

5 open, 4 closed

9

Frontier

By Epoch's flag

11B

Largest traceable

T5-11B

2019

Span

8 with a traceable size

Releases

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

Records

9
Frontier models from United States of America in 2019, newest first. Each row links to the source Epoch AI records for it.
ModelOrganisationReleasedParametersWeights
OpenAI FiveOpenAI2019-12159MClosed
Noisy Student (L2)Carnegie Mellon University (CMU)2019-11480MClosed
XLM-RoBERTaFacebook AI2019-11550MOpen
T5-11BGoogle2019-1011BOpen
T5-3BGoogle2019-103BOpen
Megatron-BERTNVIDIA2019-094BClosed
Megatron-LM (8.3B)NVIDIA2019-098B *Closed
RoBERTa LargeFacebook2019-07355MOpen
XLNetCarnegie Mellon University (CMU)2019-06340MOpen

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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