Elon Musk just announced on x.com that the model has been released as «open source» under a «Grok 2 Community License Agreement.»
The license forbids the use of the material to «train, create or improve» any foundational AI models, but does allow for some commercial use.
Musk also said that Grok 3 — the model currently running on x.com, will be open sourced in about 6 months:
The @xAI Grok 2.5 model, which was our best model last year, is now open source.
Grok 3 will be made open source in about 6 months. https://t.co/TXM0wyJKOh
— Elon Musk (@elonmusk) August 23, 2025
Grok 2 was released on August 20, 2024, and was iteratively improved over the following months.
It’s a multimodal model that can understand images, search the web, understand PDFs, and has a built-in text-to-images model.
Grok 3 looks more attractive
Like Musk says, it was the state of the art for x.ai at the time, but was replaced just six months later in February 2025 by Grok 3.
Grok 3 would be the big kahuna if and when it gets open sourced, and was considered a flagship reasoning model at the time of its release, but was superseded by the launch of Grok 4 in July, 2025.
Grok 3 has also been famous for it’s changing system prompts, causing anitsemitism and Hitler-praising runs that got so bad they had to shut it down.
Read more: Elon Musk’s post on x, Grok 2 on Hugging Face, and discussion on r/singularity.