Grok 4 Fast feel like it shouldn't exist...

Elon Musk and xAI just released Grok 4 Fast.

MY FULL VIDEO ON IT (it’s a lot bigger than it seems)

It’s really good… better than Gemini 2.5 Pro

It has a 2 million token context window (really good).

Here’s the thing… it’s 47 times cheaper than Grok 4.

Grok 4 is still the king of the ARC-AGI benchmark, ML researchers are using it climb even higher on the Leaderboard, but now this new model is just as good and A LOT cheaper.

Google always showed that the Gemini family is the best on the “intelligence cost curve”. Now Grok 4 Fast completely breaks that idea. It’s far and away the biggest winner on that chart.

Elon’s massive bet on post-training and scaling RL is now beginning to pay dividends.

We are about to see what happens to AI model’s abilities when as you point the world’s largest training cluster on them.

Check out my full coverage here:

It’s getting exciting :)

-Wes Roth