grok-3-fast
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xAI model grok-3-fast. Prices are in US dollars per million tokens.
Current price, since 2025-09-09: input $5.00, output $25.00, cached input $1.25.
xAI's pricing page does not list this model under this id.
Price a request with this model.
Standard price history#
| From | Input | Cached input | Cache write | Output | Longer prompts | Dated by | Source |
|---|---|---|---|---|---|---|---|
| 2025-09-09 | $5.00 | $1.25 | $25.00 | models.dev commit | link | ||
| 2025-06-17 | $5.00 | $1.25 | $25.00 | $25.00 | models.dev commit | link | |
| 2025-06-10, first record | $5.00 | $25.00 | models.dev commit | link |
A blank cache price is charged at the input price. Longer prompts list the prices for requests whose whole prompt exceeds the size given.
import model_prices
model_prices.rates("grok-3-fast", provider="xai")