Grok Code Fast 1 is xAI's specialized coding model optimized for fast code generation, completion, and debugging. It delivers low-latency code output within a context window of 256K tokens, tuned specifically for software development workflows.
import { streamText } from 'ai'
const result = streamText({ model: 'xai/grok-code-fast-1', prompt: 'Why is the sky blue?'})Grok Code Fast 1 is xAI's first dedicated coding model, released August 28, 2025. Unlike the general-purpose Grok models that handle coding alongside other tasks, Grok Code Fast 1 is specifically optimized for software development: code generation, completion, refactoring, debugging, and code explanation. The specialization targets lower latency and code-tuned outputs for development workflows.
The model operates within a context window of 256K tokens and up to 256K tokens per response, with low-latency inference for development tools. It handles code across major programming languages and frameworks, and focuses on project context, coding conventions, and production-style snippets over toy examples.
Grok Code Fast 1 is available at $0.2 per million input tokens and $1.5 per million output tokens through Vercel AI Gateway. Its speed optimization makes it practical for IDE integrations, automated code review, and CI/CD pipeline tasks where response time impacts developer productivity.