How to Get a Free xAI API Key (2026)
3 free models available — no credit card required. Get your xAI API key →
All Free xAI Models — Context Windows & Rate Limits
| Model | Context | Max Output | Modality | Rate Limit | Released | Status | |
|---|---|---|---|---|---|---|---|
| grok-4.3 | 1.0M | 32K | Credit-based | — | Online | Details | |
| grok-4.1-fast | 2.0M | 32K | Credit-based | — | Online | Details | |
| grok-3-mini | 131K | 8K | Credit-based | — | Online | Details |
Pricing & Limits
Credit Card Not required
Free Tier Permanently free
Context Range 131K – 2.0M
Total Models 3 free
Rate Limits Credit-based
API Compatibility See provider docs
Use Cases
What xAI's free models are best for, based on aggregated model capabilities: