The AI Museum
AI Analytics1,072 recordsRecounted 23 September 2026

Language models from United States of America

Weightsopenclosedunknownfrontier only
Year20262025202420232022202120202019201820172016
2 filters active, showing 259 of 1,072 recordsClear all

259

Models

57 organisations

36%

Open weights

81 open, 145 closed

38

Frontier

By Epoch's flag

1.6T

Largest traceable

Switch

1959–2026

Span

104 with a traceable size

Releases

by year, from 2011
2011201220132014201520162017201820192020202120222023202420252026

Organisation

Country

Domain

Records

newest 50 of 259
Language models from United States of America, newest first. Each row links to the source Epoch AI records for it.
ModelOrganisationReleasedParametersWeights
Claude Fable 5.1Anthropic2026-09—Closed
Gemini 3.8 FlashGoogle DeepMind2026-09—Closed
Grok 4.7xAI2026-092B *Closed
Muse Spark 1.3Meta AI2026-09—Closed
Muse Spark 1.2Meta AI2026-08—Closed
Claude Opus 5Anthropic2026-07—Closed
InklingThinking Machines2026-07975B *Open
Claude Fable 5Anthropic2026-06—Closed
Claude Mythos 5Anthropic2026-06—Closed
MAI-Code-1-FlashMicrosoft2026-06—Closed
Nemotron 3 UltraNVIDIA2026-06550B *Open
Claude Opus 4.8Anthropic2026-05—Closed
Composer 2.5Cursor2026-051.0T *Closed
Gemini 3.5 FlashGoogle DeepMind2026-05—Closed
TML-Interaction-SmallThinking Machines2026-05276BClosed
Claude Mythos PreviewAnthropic2026-04—Not recorded
Claude Opus 4.7Anthropic2026-04—Closed
Composer 2Cursor2026-031.0TClosed
Gemini 3.0 Flash-liteGoogle DeepMind2026-03—Closed
Nemotron 3 SuperNVIDIA2026-03120B *Open
SWE 1.6Cognition2026-03—Closed
GPT-5.3 CodexOpenAI2026-02—Closed
GPT-5.3-Codex-SparkOpenAI2026-02—Closed
Grok 4.20xAI2026-02500B *Closed
GPT-5.2 CodexOpenAI2025-12—Closed
Nemotron 3-Nano-30B-A3BNVIDIA2025-1232B *Open
Claude Opus 4.5Anthropic2025-11—Closed
Gemini 3 Deep ThinkGoogle DeepMind2025-11—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
Olmo 3Allen Institute for AI2025-1132BOpen
Claude Haiku 4.5Anthropic2025-10—Closed
Claude Sonnet 4.5Anthropic2025-09—Closed
Claude Opus 4.1Anthropic2025-08—Closed
Gemini 2.5 Deep ThinkGoogle2025-08—Closed
gpt-oss-120bOpenAI2025-08117BOpen
gpt-oss-20bOpenAI2025-0821BOpen
Gemini EmbeddingGoogle DeepMind2025-07—Closed
Grok 4xAI2025-073.0T *Closed
Grok 4 HeavyxAI2025-07—Closed
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
Gemini 2.5 Pro (Mar 2025)Google DeepMind2025-03—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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