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High Reasoning

Grok Code Fast 1

Grok Code Fast 1 is xAI's specialized coding assistant that delivers lightning-fast responses at approximately 92 tokens per second with a 256,000-token context window, making it ideal for rapid prototyping and agentic coding workflows. Priced at just $0.20 per million input tokens, it combines speed, cost-efficiency, and practical coding proficiency across TypeScript, Python, Java, Rust, C++, and Go.

256k Context
High Intelligence
No cutoff Knowledge

Available for Chat, Vision, and File Uploads.

Performance Benchmarks

MMLU-Pro
79.3%
LiveCodeBench
65.7%
GPQA
72.7%

How do you want to interact?

Start a Conversation

Ask anything.
Have a natural conversation, brainstorm ideas, draft emails, or ask for advice.

Start Chatting

Use a Persona

Specialized Experts.
Instruct the AI to act as a Coding Tutor, Marketing Expert, or Travel Guide.

Pick a Persona

Why use Grok Code Fast 1?

Rapid Prototyping

Scaffolds simple apps and scripts in seconds for quick development starts

High-Speed Throughput

Delivers responses at 92-190 tokens per second for snappy, interactive coding loops

Agentic Tool Use

Supports function calls, shell commands, and multi-step autonomous workflows with visible reasoning

Capability Examples

Rapid Prototyping in Python
Write a fast Python script to scrape pet-friendly locations from a sample API and output JSON.
python\nimport requests\n\ndata = requests.get('https://api.example.com/pets?friendly=true').json()\n\npet_locations = [{'name': item['place'], 'lat': item['lat'], 'lon': item['lon']} for item in data['results']]\nprint(pet_locations)\nFixed edge cases for empty API response in <1s.
Bug Fix in TypeScript
Fix this buggy TypeScript function for codebase search that crashes on null inputs: function searchCode(codebase: string[], query: string) { return codebase.find(s => s.includes(query)); }
typescript\nfunction searchCode(codebase: string[], query: string): string[] {\n if (!query

How to use

1
Go to Chat

Navigate to the "AI Chat" page.

2
Select Model

Ensure Grok Code Fast 1 is selected.

3
Type Prompt

Ask a question or paste code.

4
Interact

Refine the answer by replying to the AI.

Compare LLMs Side-by-Side

Is Grok Code Fast 1 better than Claude 3.5 or Gemini? Test same prompts simultaneously in the Chat Playground.

Open Chat Playground

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