Grok Code Fast 1

Grok Code Fast 1 is xAI's coding-focused reasoning model built from the ground up for agentic software development. According to the launch announcement, it was constructed "from scratch, starting with a brand-new model architecture," with a pre-training corpus weighted toward programming content and post-training datasets curated from real-world pull requests and coding tasks, a training collaboration that xAI says gives the model strong instincts for the kinds of edits developers make every day. The model was positioned as a "speedy daily driver" — nimble and responsive enough to handle the repeated reasoning and tool-call loops that make agentic coding feel slow with larger general-purpose models.

Independent hosting documentation describes Grok Code Fast 1 as a coding model optimized for common, high-volume programming tasks and agentic workflows, built to support the planning, writing, testing, and debugging cycle with speed and low cost as headline traits. The same Oracle Cloud Infrastructure page now flags the model as deprecated, and xAI's own launch notes stress that it was "mastered in the use of common tools like grep, terminal, and file editing," making it well suited to IDE-based use cases ranging from zero-to-one project scaffolding and codebase Q&A to bug fixing in mainstream languages. Given its deprecated status, teams still relying on it should plan a migration to a currently supported coding model.