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Grok 4 Fast token cost
xAI · context 256,000 tokens · tokenizer Approx
Open in cost calculator · Count tokens · Full calculator · Official pricing
When to use Grok 4 Fast
Legacy Grok 4 Fast slug kept for migration math. Requests redirect to Grok 4.3 billing; prefer Grok 4.7 for new volume work.
Pricing
- Input
- $1.25/1M
- Output
- $2.50/1M
- Cached input
- $0.200/1M
- Verified
Official pricing source · Open main calculator · Cheaper long context models
Retired slug redirects to grok-4.3 (low reasoning effort) and bills at Grok 4.3 rates. Prefer Grok 4.7 for new work.
Estimate with TokenCalculator
Preselect Grok 4 Fast in the calculator to count tokens and project request or monthly cost. Exact vs Approx follows this model's tokenizer family. See the Exact vs Approx guide for honesty rules.
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Sources and references
Official documentation used for definitions, counting methods, or rate cards. Always confirm critical budgets on the provider page.