Grok 3 Fast
Grok 3 Fast is a text model from 
xAI with a context window of 131K tokens and max output of 131K tokens. Pricing starts at 5.00 per million input tokens and 25.00 per million output tokens (cheapest at Oracle Cloud (OCI)).
Capabilities
✗ Vision✓ Function Calling✗ Reasoning✗ JSON Schema✗ System Messages✓ Web Search✗ Prompt Caching✗ Audio Input✗ Audio Output
Specifications
| Model Key | xai/grok-3-fast-latest |
| Provider | xAI |
| Provider ID | xai |
| Mode | Text |
| Canonical Name | grok-3-fast |
| Context Window | 131K tokens |
| Max Output | 131K tokens |
Pricing
| Type | Per 1K Tokens | Per 1M Tokens |
|---|---|---|
| Input Tokens | 0.0050 | 5.00 |
| Output Tokens | 0.025 | 25.00 |
| Cache Read (Input) | 0.0013 | 1.25 |
Benchmarks
No benchmark data is available for this model.
Price Comparison by Provider
Compare prices for Grok 3 Fast across different providers. The same model may be available through multiple providers at different price points.
Provider | Model Key | Input Price, $ | Output Price, $ |
|---|---|---|---|
| xAI | xai/grok-3-fast-beta | 5.00 | 25.00 |
 Vercel AI Gateway | vercel_ai_gateway/xai/grok-3-fast | 5.00 | 25.00 |
 Oracle Cloud (OCI) | oci/xai.grok-3-fast | 5.00 | 25.00 |
All Variants
All available versions, regions, and API endpoints for Grok 3 Fast.
Model Key | Provider | Mode | Input Price, $ | Output Price, $ | Context | Max Output | Vision | Functions |
|---|---|---|---|---|---|---|---|---|
| oci/xai.grok-3-fast | Oracle Cloud (OCI) | Text | 5.00 | 25.00 | 131K | 131K | no | yes |
| vercel_ai_gateway/xai/grok-3-fast | Vercel AI Gateway | Text | 5.00 | 25.00 | 131K | 131K | no | yes |
| xai/grok-3-fast-beta | xAI | Text | 5.00 | 25.00 | 131K | 131K | no | yes |
| xai/grok-3-fast-latest | xAI | Text | 5.00 | 25.00 | 131K | 131K | no | yes |