Grok Code Fast 1

Announced on August 28, 2025, Grok Code Fast 1 is a speedy, economical reasoning model purpose-built for agentic coding. It “thinks before responding,” supports function calling and structured outputs, and provides a 256,000-token context window for large codebases. Official pricing is $0.20 per million input tokens, $1.50/M output, and $0.02/M cached input; live search isn’t supported. Typical rate limits are 480 requests/minute and 2M tokens/minute. xAI highlights fast tool-use loops and visible “thinking trace,” and notes strong performance on everyday coding tasks across TypeScript, Python, Java, Rust, C++, and Go. It’s generally available via the xAI API, with limited-time free access through partners like GitHub Copilot, Cursor, and Cline.