The AI Museum
AI Analytics1,072 recordsRecounted 23 September 2026

Closed-weight models from United States of America in 2025

Weightsopenclosedunknownfrontier only
Year20262025202420232022202120202019201820172016
3 filters active, showing 53 of 1,072 recordsClear all

53

Models

9 organisations

0%

Open weights

0 open, 53 closed

6

Frontier

By Epoch's flag

5B

Largest traceable

π0.6 (pi-0.6)

2025

Span

2 with a traceable size

Releases

by month
Jan
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Organisation

Country

Domain

Records

newest 50 of 53
Closed-weight models from United States of America in 2025, newest first. Each row links to the source Epoch AI records for it.
ModelOrganisationReleasedParametersWeights
GPT-5.2OpenAI2025-12—Closed
GPT-5.2 CodexOpenAI2025-12—Closed
GPT-5.2 ProOpenAI2025-12—Closed
SIMA 2Google DeepMind2025-12—Closed
Claude Opus 4.5Anthropic2025-11—Closed
Gemini 3 Deep ThinkGoogle DeepMind2025-11—Closed
Gemini 3 ProGoogle DeepMind2025-11—Closed
Gemini 3 Pro Image (Nano Banana Pro)Google DeepMind2025-11—Closed
GPT-5.1OpenAI2025-11—Closed
GPT-5.1 InstantOpenAI2025-11—Closed
GPT-5.1-CodexOpenAI2025-11—Closed
GPT-5.1-Codex-MaxOpenAI2025-11—Closed
Grok 4.1xAI2025-11—Closed
Grok 4.1 FastxAI2025-11—Closed
Kaiju LargeCharacter.ai2025-11110B *Closed
Kaiju MediumCharacter.ai2025-1134B *Closed
Kaiju SmallCharacter.ai2025-1113B *Closed
Meta's Generative Ads Model (GEM)Meta AI2025-11—Closed
π0.6 (pi-0.6)Physical Intelligence2025-115BClosed
Claude Haiku 4.5Anthropic2025-10—Closed
GPT-5 ProOpenAI2025-10—Closed
Veo 3.1Google DeepMind2025-10—Closed
Claude Sonnet 4.5Anthropic2025-09—Closed
Gemini Robotics-ER 1.5Google DeepMind2025-09—Closed
Sora 2.0OpenAI2025-09—Closed
Claude Opus 4.1Anthropic2025-08—Closed
Gemini 2.5 Deep ThinkGoogle2025-08—Closed
Gemini 2.5 Flash Image (Nano Banana)Google2025-08—Closed
GPT-5OpenAI2025-08—Closed
GPT-5 miniOpenAI2025-08—Closed
GPT-5 nanoOpenAI2025-08—Closed
Gemini EmbeddingGoogle DeepMind2025-07—Closed
Grok 4xAI2025-073.0T *Closed
Grok 4 HeavyxAI2025-07—Closed
FGNGoogle DeepMind2025-06720MClosed
Gemini 2.5 Pro (Jun 2025)Google DeepMind2025-06—Closed
Claude Opus 4Anthropic2025-05—Closed
Claude Sonnet 4Anthropic2025-05—Closed
Gemini 2.5 Pro (May 2025)Google DeepMind2025-05—Closed
Imagen 4Google2025-05—Closed
Veo 3Google DeepMind2025-05—Closed
gpt-image-1OpenAI2025-04—Closed
Llama 4 Behemoth (preview)Meta AI2025-042.0T *Closed
Gemini 2.5 Pro (Mar 2025)Google DeepMind2025-03—Closed
GPT-4o (Mar 2025)OpenAI2025-03—Closed
o1-proOpenAI2025-03—Closed
Claude 3.7 SonnetAnthropic2025-02—Closed
GPT-4.5OpenAI2025-02—Closed
Grok 3xAI2025-023.0T *Closed
MercuryInception Labs2025-02—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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