"Sonic" = Grok Code Fast. Get this frontier AI model 100% free in Kilo Code

The rumours are true. The stealth model "Sonic" which we gave you exclusive access to last week is from xAI.

Kilo Code is a 100% free, open-source AI agent extension for VS Code with over 250,000 installs.

We've partnered with xAI to bring you exclusive access to this powerful frontier model for free. And by free we mean really free: No rate limits and fast code generation.

TL;DR: Grok Code Fast is a frontier AI model that launched in GA today, and you get free access to use it inside Kilo Code.

The Model: Grok Code Fast

• Blazing-fast reasoning model optimized for agentic coding

• Free for a limited time (at least one week) through our launch partnership with xAI. Users opt-in to share usage data to help improve the model.

• Early access for Kilo Code users

• 262k context window (combined input/output)

• Unlimited usage—no throttling, no caps

"Our community raved about the speed of Grok Code Fast and were delighted by the model's tool calling proficiency in Kilo Code."

Brendan O’Leary, Developer Relations Engineer, Kilo Code

Standard Pricing (read: what you would pay outside Kilo Code, currently 100% free for Kilo Code users):

• Input tokens: $0.20/1M tokens

• Cached tokens: $0.02/1M tokens

• Output tokens: $1.50/1M tokens

How to Use Grok Code Fast in Kilo Code... 100% Free

Kilo Code is a launch partner with xAI and we're able to bring you this blazing fast coding model completely free for a limited time.

1. Install Kilo Code

Download our VS Code extension and join 250,000+ developers already using Kilo.

2. Select Grok Code Fast

Navigate to Settings, set API Provider to Kilo Code and Model to 'x-ai/grok-code-fast-1'

3. Start Coding

That's it. Get a frontier AI model with zero cost (for a limited time).