xAI API Pricing
xAI API pricing for all 6 models, updated April 2026. Compare input and output token costs per 1M tokens across the full xAI model range.
Cheapest model: Grok 4 Fast at $0.20/1M input tokens
Model | Provider | Input / 1M | Output / 1M | Est. Input Cost | Est. Output Cost |
|---|---|---|---|---|---|
Grok 4 Fast2,000,000 ctx | xAI | $0.20 | $0.50 | $0.2000 | $0.5000 |
Grok 4.1 Fast2,000,000 ctx | xAI | $0.20 | $0.50 | $0.2000 | $0.5000 |
Grok 3 Mini131,000 ctx | xAI | $0.30 | $0.50 | $0.3000 | $0.5000 |
Grok 4.20 Beta2,000,000 ctx | xAI | $2.00 | $6.00 | $2.0000 | $6.0000 |
Grok 4256,000 ctx | xAI | $3.00 | $15.00 | $3.0000 | $15.0000 |
Grok 3131,000 ctx | xAI | $3.00 | $15.00 | $3.0000 | $15.0000 |
About xAI API Pricing
xAI offers 6 API models tracked on UsagePricing. All prices shown are standard pay-as-you-go rates per 1 million tokens — input tokens (your prompt) and output tokens (the model's response) are billed separately. Prices are reviewed daily and reflect the latest published rates from xAI.
Featured xAI Models
Frequently Asked Questions
How much does xAI API cost? ▼
xAI offers 6 API models. Pricing starts from $0.20 per 1M input tokens as of April 2026. Compare all xAI models on this page.
What is the cheapest xAI model? ▼
As of April 2026, the cheapest xAI model by input price is Grok 4 Fast at $0.20 per 1M input tokens.
How do I calculate my xAI API costs? ▼
Use the free xAI pricing calculator on UsagePricing.com. Enter your expected monthly token volume and the calculator estimates your total API spend based on current xAI rates.