
xAI, the AI startup of Elon Musk, has open-sourced its Grok 2.5 model. It means the model is now freely available for developers and researchers worldwide. Musk announced the update on Saturday via a post on X, his social media platform, where he also revealed that the company’s upcoming Grok 3 model will follow suit in about six months.
The @xAI Grok 2.5 model, which was our best model last year, is now open source.
— Elon Musk (@elonmusk) August 23, 2025
Grok 3 will be made open source in about 6 months. https://t.co/TXM0wyJKOh