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When the only strategy to understand the universe is truth-seeking, you build a truth-seeking machine
September was my last month at xAI! I joined as one of the first members of the post-training team in 2024 and eventually led research tooling, where we built some of the world’s best systems to accelerate Grok’s development. On my first day, I was at the whiteboard with @ibab…
thoughtful writing
Try uploading your PDFs to Grok, including books! We’ve significantly improved performance on summarizing or answering questions about long documents.
We've upgraded Grok 4's PDF processing abilities: 1. Grok can now seamlessly handle massive PDFs - hundreds of pages and beyond! 2. Grok has a better understanding of the PDF content through sharper recognition capabilities. Grok's PDF upgrades are now live for all our users on…
maybe the real human data was the friends we made along the way
Meta taking a 49% stake in Scale AI for $14.8B, investors and employees get paid. Meta prob wanted to acquire them but didn’t want to go through regulatory approval so found this roundabout scheme. Alexandr will run Meta’s superintelligence lab, and Scale will find a new ceo

training a model on X is called post training *not to be confused with post-training, which comes after pre-training
once again we learn the hard lesson that hard things are supposed to be hard
the team cooked with this one
Meet the Grok 3 family, now on our API! Grok 3 Mini outperforms reasoning models at 5x lower cost, redefining cost-efficient intelligence. Grok 3, the world's strongest non-reasoning model, excels in tasks that need real world knowledge like law, finance, and healthcare.

insanely fun year ahead, prepare for max acceleration :)
how it feels to release GPUs back into the pool for your cracked coworker's training run
taking requests for magic crystal ball to predict the future below (with %) 🔮
This is it: The world’s smartest AI, Grok 3, now available for free (until our servers melt). Try Grok 3 now: x.com/i/grok X Premium+ and SuperGrok users will have increased access to Grok 3, in addition to early access to advanced features like Voice Mode
Woah! That was one of the most unexpectedly rewarding hours of my life. Instead of passively listening to an audiobook about physics while doing errands as usual I had an hour long back-and-forth conversation with Ara from Grok 3 about a bunch of scientific topics. We started…
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