The AI Museum
AI Analytics1,072 recordsRecounted 23 September 2026

Closed-weight language models in 2023

21

Models

17 organisations

0%

Open weights

0 open, 21 closed

4

Frontier

By Epoch's flag

1.1T

Largest traceable

PanGu-Σ

2023

Span

8 with a traceable size

Releases

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

Records

21
Closed-weight language models in 2023, newest first. Each row links to the source Epoch AI records for it.
ModelOrganisationReleasedParametersWeights
GQA-8-XXLGoogle Research2023-1211BClosed
AndesGPTOppo Mobile Telecommunications2023-11Closed
Claude 2.1Anthropic2023-11Closed
Cohere EmbedCohere2023-11Closed
Inflection-2Inflection AI2023-11Closed
PPLX-70B-OnlinePerplexity2023-1170B *Closed
RoFormerZhuiyi Technology2023-11110MClosed
CODEFUSION (Python)Microsoft2023-1075MClosed
Amazon TitanAmazon2023-09200B *Closed
GPT-3.5 Turbo InstructOpenAI2023-0920B *Closed
Claude 2Anthropic2023-07Closed
GPT3-2.7B (FlashAttention-2)Stanford University2023-073BClosed
InternLMShanghai AI Lab2023-07104BClosed
ERNIE 3.5Baidu2023-06Closed
GPT-3.5 TurboOpenAI2023-0620B *Closed
LTM-1Magic2023-06Closed
DPO on Pythia-2.8BStanford University2023-053BClosed
PaLM 2Google2023-05340B *Closed
BloombergGPTBloomberg2023-0351BClosed
ClaudeAnthropic2023-03Closed
PanGu-ΣHuawei Noah's Ark Lab2023-031.1TClosed

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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