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Models

Models from the labs in Epoch AI's catalog, the repositories they published on Hugging Face, and posts from their own news pages.

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7 notable models from xAI, newest first. The date is Epoch AI's publication date for the model.

Grok 4.7xAI · Language · 2.1B parametersAPI accessSep 21Grok 4.20xAI · Language · 500B parametersAPI accessFeb 17Grok 4.1 FastxAI · LanguageAPI accessNov 19, 2025Grok 4.1xAI · LanguageAPI accessNov 17, 2025Grok 4 HeavyxAI · LanguageUnreleasedJul 10, 2025Grok 4xAI · Language, Multimodal, Vision · 3,000B parameters · Training compute 5e26 FLOPAPI accessJul 9, 2025Grok 3xAI · Language, Vision, Multimodal · 3,000B parameters · Training compute 3.5e26 FLOPAPI accessFeb 17, 2025

Data: Epoch AI, CC BY 4.0. Changes: selected rows and columns of Epoch AI's database.