XAI: Grok 4 Fast
Speed meets intelligence
Deploy Reasoning at Production Scale
Lightning-Fast Generation
10x Faster Response Times
Delivers responses in 2.55s to first token with 342.3 tokens per second output speed.
Massive Context Window
2 Million Token Context
Process entire documents and datasets without losing precision or reasoning quality.
Cost Efficiency
98% Lower Operational Cost
Uses 40% fewer thinking tokens while maintaining near-flagship performance on benchmarks.
Examples
See what XAI: Grok 4 Fast can create
Copy any prompt below and try it yourself in the playground.
Financial Analysis
“Analyze this quarterly earnings report and identify key financial trends, risk factors, and growth opportunities. Provide structured insights with supporting data points.”
Code Review
“Review this Python function for performance bottlenecks, security vulnerabilities, and code quality improvements. Suggest optimized alternatives.”
Research Synthesis
“Summarize these 50-page research papers on machine learning optimization and extract the most impactful findings and methodologies.”
Legal Document Analysis
“Extract key clauses, obligations, and risk areas from this contract. Flag potential issues and suggest clarifications.”
For Developers
A few lines of code.
Reasoning. Instant. Affordable.
ModelsLab handles the infrastructure: fast inference, auto-scaling, and a developer-friendly API. No GPU management needed.
- Serverless: scales to zero, scales to millions
- Pay per token, no minimums
- Python and JavaScript SDKs, plus REST API
import requestsresponse = requests.post("https://modelslab.com/api/v7/llm/chat/completions",json={"key": "YOUR_API_KEY","prompt": "","model_id": ""})print(response.json())
Ready to create?
Start generating with XAI: Grok 4 Fast on ModelsLab.