Grok-1 (open weights)

xAI · Grok (open weights) line · flagship · open weights

Released March 17, 2024Replaced by Grok 2.5

Grok-1 (open weights) was released by xAI on March 17, 2024, as an open-weights flagship model in the Grok (open weights) line.

Release 1 of 2 in the Grok (open weights) line.
The first release in this line.
Replaced by Grok 2.5 on August 23, 2025, 524 days later.
Its usual gap between releases was about 524 days; the line's last release was on August 23, 2025.

No detailed card for this model: we only add numbers published by the maker or by independent benchmarks. Sources: xAI · xAI on GitHub · Hugging Face

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Where the Grok (open weights) line stands

Grok 2.5 is the current model in this line. The card shows how long it has been since the last release against the line's usual gap and its recent ones — the rhythm, not a date.