Open-weight frontier models from United States of America
10
Models
6 organisations
100%
Open weights
10 open, 0 closed
10
Frontier
By Epoch's flag
1.6T
Largest traceable
Switch
2018–2024
Span
10 with a traceable size
Records
10| Model | Organisation | Released | Parameters | Weights |
|---|---|---|---|---|
| Llama 3.1-405B | Meta AI | 2024-07 | 405B | Open |
| Nemotron-4 340B | NVIDIA | 2024-06 | 340B | Open |
| Switch | 2021-01 | 1.6T | Open | |
| mT5-XXL | 2020-10 | 13B | Open | |
| XLM-RoBERTa | Facebook AI | 2019-11 | 550M | Open |
| T5-11B | 2019-10 | 11B | Open | |
| T5-3B | 2019-10 | 3B | Open | |
| RoBERTa Large | 2019-07 | 355M | Open | |
| XLNet | Carnegie Mellon University (CMU) | 2019-06 | 340M | Open |
| ResNeXt-101 32x48d | 2018-05 | 829M | Open |
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.