grok-code-fast-1 is exceptionally versatile across the full software development stack

Grok Code Fast 1

We're thrilled to introduce grok-code-fast-1, a speedy and economical reasoning model that excels at agentic coding.

A speedy daily driver
While today's models are undeniably powerful, they often don't feel purpose-built for agentic coding workflows, where loops of reasoning and tool calls can feel frustratingly slow. As heavy users of agentic coding tools, our engineers saw room for a more nimble, responsive solution optimized for our day-to-day tasks.

We built grok-code-fast-1 from scratch, starting with a brand-new model architecture. To lay a robust foundation, we carefully assembled a pre-training corpus rich with programming-related content. For post-training, we curated high-quality datasets that reflect real-world pull requests and coding tasks.

Throughout the training process, we collaborated closely with our launch partners to refine and sharpen the model’s behavior inside their agentic platforms. grok-code-fast-1 has mastered the use of common tools like grep, terminal, and file editing, and thus should feel right at home in your favorite IDE.

We've teamed up with select launch partners to offer grok-code-fast-1 for free for a limited time, including GitHub Copilot, Cursor, Cline, Roo Code, Kilo Code, opencode, and Windsurf.

Blazing fast
Our inference and supercomputing teams developed several innovative techniques to dramatically accelerate our serving speed, creating a uniquely responsive experience where the model will have already called dozens of tools before you even finish reading the first paragraph of the thinking trace. We've also invested in prompt caching optimizations, regularly achieving cache hit rates above 90% when used with our launch partners.

A versatile programmer
grok-code-fast-1 is exceptionally versatile across the full software development stack and is particularly adept at TypeScript, Python, Java, Rust, C++, and Go. It can complete common programming tasks with minimal oversight, ranging from building zero-to-one projects and providing insightful answers to codebase questions to performing surgical bug fixes.