xAI
Grok 4 Fast Pricing
API pricing for Grok 4 Fast by xAI. Input tokens cost $0.2/1M, output tokens cost $0.5/1M with 2M context window.
Last updated:
ReasoningToolsVision
Input Cost
$0.2
per 1M tokens
Output Cost
$0.5
per 1M tokens
Context Window
2M
tokens
Cost Calculator
Estimated Cost:
$0.00
Model Details
Provider
xAI
Model ID
grok-4-fast
Context Window
2M tokens
Max Output
30000 tokens
Cache Read Cost
$0.05/1M
Release Date
2025-09-19
Compare Alternatives
| Model | Input | Output | Context |
|---|---|---|---|
| Grok 4 Fast (this model) | $0.2 | $0.5 | 2M |
| DeepSeek Chat DeepSeek | $0.28 | $0.42 | 128K |
| DeepSeek Reasoner DeepSeek | $0.28 | $0.42 | 128K |
| Grok 4 Fast (Non-Reasoning) xAI | $0.2 | $0.5 | 2M |
| Grok 4.1 Fast xAI | $0.2 | $0.5 | 2M |
| Grok 4.1 Fast (Non-Reasoning) xAI | $0.2 | $0.5 | 2M |
Available from Resellers
Grok 4 Fast is also available through these resellers and gateways:
| Reseller | Model | Input | Output |
|---|---|---|---|
| Abacus | Grok 4 Fast (Non-Reasoning) | $0.2 | $0.5 |
| Abacus | Grok 4.1 Fast (Non-Reasoning) | $0.2 | $0.5 |
| Abacus | Grok Code Fast 1 | $0.2 | $1.5 |
| Azure | Grok 4 Fast (Non-Reasoning) | $0.2 | $0.5 |
| Azure | Grok 4 Fast (Reasoning) | $0.2 | $0.5 |
| Azure | Grok Code Fast 1 | $0.2 | $1.5 |
| Azure Cognitive Services | Grok 4 Fast (Non-Reasoning) | $0.2 | $0.5 |
| Azure Cognitive Services | Grok 4 Fast (Reasoning) | $0.2 | $0.5 |
| Azure Cognitive Services | Grok Code Fast 1 | $0.2 | $1.5 |
| GitHub Copilot | Grok Code Fast 1 | $0 | $0 |