Elon Musk’s AI startup, xAI, has unveiled Grok Code Fast 1, a cutting-edge agentic coding model designed to revolutionize software development workflows. Tailored for speed and efficiency, this model aims to empower developers with a tool that not only writes code but also autonomously manages coding tasks, making it a formidable competitor in the AI coding assistant arena.Reuters
What Is Grok Code Fast 1?
Grok Code Fast 1 is a specialized AI model built from the ground up to enhance agentic coding workflows. Unlike traditional AI assistants that merely suggest code snippets, Grok Code Fast 1 autonomously performs various programming tasks, including building projects from scratch, debugging, and providing insights into codebases. It excels in languages such as TypeScript, Python, Java, Rust, C++, and Go, making it a versatile tool for developers.
Key Features
- High-Speed Performance: Operating at approximately 92 tokens per second, Grok Code Fast 1 delivers rapid responses, facilitating a seamless coding experience.
- Extensive Context Window: With a context window of 256,000 tokens, it can handle large codebases and maintain coherence over extended interactions.
- Tool Integration: The model is trained to utilize common tools like grep, terminal commands, and file editing, making it compatible with various integrated development environments (IDEs). xAI
- Visible Reasoning Traces: Developers can view the model’s reasoning process, allowing for better understanding and control over its outputs.
Pricing & Availability
Grok Code Fast 1 is available at the following rates:
- Input Tokens: $0.20 per million
- Output Tokens: $1.50 per million
- Cached Input Tokens: $0.02 per million
For a limited time, the model is offered for free through select launch partners, including GitHub Copilot, Cursor, Cline, Roo Code, Kilo Code, opencode, and Windsurf.
How to Access
Developers can access Grok Code Fast 1 through various platforms:
- GitHub Copilot: Available as an opt-in public preview for Pro, Pro+, Business, and Enterprise plans in Visual Studio Code. Individual users can enable it via the model picker.
- Cline: Users can select Grok Code Fast 1 from the model options in Cline’s settings.
- OpenRouter: Accessible through the OpenRouter platform, allowing integration into various development environments.
Grok Code Fast 1 vs. GPT-5: A Comparative Analysis
| Feature | Grok Code Fast 1 | GPT-5 |
|---|---|---|
| Release Date | August 2025 | August 2025 |
| Context Window | 256,000 tokens | 400,000 tokens |
| Speed | 92 tokens/sec | 190 tokens/sec |
| Input Token Cost | $0.20 per million | $1.25 per million |
| Output Token Cost | $1.50 per million | $10.00 per million |
| Strengths | High-speed performance, cost-effective | Advanced reasoning, broader capabilities |
While GPT-5 offers a larger context window and advanced reasoning capabilities, Grok Code Fast 1 stands out with its speed and cost-effectiveness, making it a compelling choice for developers prioritizing rapid development cycles.
Benchmark Performance
Grok Code Fast 1 has demonstrated impressive performance on various benchmarks:
- SWE-Bench-Verified: Achieved a score of 70.8% using xAI’s internal testing harness.
- Leetcode Coding Benchmark (LCB): Proven proficiency in solving real coding tasks, including logic building and data structure utilization.
These benchmarks underscore the model’s capability to handle complex coding tasks efficiently.
Future Developments
xAI plans to update Grok Code Fast 1 frequently, with improvements rolling out in “days rather than weeks.” A new version supporting multimodal inputs, parallel tool calling, and extended context length is already in training. xAI
Conclusion
Grok Code Fast 1 represents a significant advancement in agentic coding, offering developers a powerful tool that combines speed, cost-effectiveness, and versatility. Whether you’re building new projects, debugging existing code, or integrating AI into your development pipeline, Grok Code Fast 1 provides the capabilities needed to enhance productivity and streamline workflows.
For more information and to try Grok Code Fast 1, visit xAI’s official website.
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