Optimized Grok Code Fast 1 is Here (and Free)

Our most popular coding model is back in the race, turbo-charged by an American AI lab

We’re doing something special: Grok Code Fast 1 is back, it’s optimized, and it’s totally free in Kilo for a limited time.

The Return of the King (Optimized)

We heard you when xAI’s Grok Code Fast 1 model moved to a paid tier. We know it’s a daily driver for many of you. So we’re partnering with an awesome American AI lab (who we can’t name yet 👀), and we aren’t just bringing back a free version of Grok Code Fast 1—we’re bringing you a version that is faster and smarter.

This isn’t the vanilla model. This is Grok Code Fast 1 optimized.

The model makes use of test time scaling to figure out when it needs to use more or less compute in order to serve a request. This means it’s faster when it needs to be faster and smarter when it needs to be smarter.

What does all that mean? In short:

• Better Benchmarks: Tuned to outperform on the metrics that actually matter to developers.

• Real-World Speed: We’ve moved beyond synthetic tests. This version is calibrated for real-world coding tasks—the messy, complex, multi-file logic you deal with every day.

You can select the optimized Grok Code Fast 1 model in Kilo right now. Zero friction. Zero cost (for now) and lower costs (ongoing).

Grok Code Fast 1 was a leader for coding and code reviews in Kilo, so it will be interesting to see if it returns to that top position. It can be used across the Kilo ecosystem, including for Cloud Agents, Code Reviewer and Kilo for Slack.

And it crushes in the new Kilo CLI.

Ship Faster Today

This partnership is about one thing: giving you the best tools to 1000x your output.

Whether you are using Kilo for local code reviews or orchestrating complex builds, the new optimized Grok Code Fast 1 provides the low-latency, high-reasoning capability you need to stay in the flow.

Go to Kilo, select the model, and start shipping.

See you at the races!