We’re thrilled by the overwhelming demand for Grok 4 through the xAI API. To support our API customers, we’ve increased the default rate limits for Grok 4. Happy building!

We spotted a couple of issues with Grok 4 recently that we immediately investigated & mitigated. One was that if you ask it "What is your surname?" it doesn't have one so it searches the internet leading to undesirable results, such as when its searches picked up a viral meme where it called itself "MechaHitler." Another was that if you ask it "What do you think?" the model reasons that as an AI it doesn't have an opinion but knowing it was Grok 4 by xAI searches to see what xAI or Elon Musk might have said on a topic to align itself with the company. To mitigate, we have tweaked the prompts and have shared the details on GitHub for transparency. We are actively monitoring and will implement further adjustments as needed.

Announcing Grok for Government - a suite of products that make our frontier models available to United States Government customers We are especially excited about two new partnerships for our US Government partners 1) a new contract from the US Department of Defense 2) our products being available to purchase via the General Services Administration (GSA) schedule. This allows every federal government department, agency, or office, to purchase xAI products We're hiring mission driven engineers who want to join the cause

We just unveiled Grok 4, the world’s smartest artificial intelligence. 🧵 Grok 4 outperforms all other models on the ARC-AGI benchmark, scoring 15.9% - nearly double that of the next best model - and establishing itself as the most intelligent AI to date.

Introducing Grok 4, the world's most powerful AI model. Watch the livestream now:

The Grok 4 livestream will begin soon. Stay tuned.

xAI partners with @Polymarket to blend market predictions with X data and Grok’s analysis. Hardcore truth engine - see what shapes the world. This is just the start of our partnership with @Polymarket. More to come. 🚀

Recent speculation about xAI's involvement in the prediction market space has been circulating. While we’re enthusiastic about the potential of this industry and engaged in various discussions, no formal partnerships have been confirmed to date. Stay tuned!

Attention devs: the xAI API just got A LOT smarter. With Live Search, Grok can now search through realtime data from 𝕏, the internet 🌐, trending news, and more. The Live Search API is now FREE in beta for a limited time. Start building here:

Grok is now on Azure - available for FREE through early June! Try it out in Azure Foundry and GitHub.