Grok 4 1 Fast Reasoning
Grok 4 1 Fast Reasoning is a text model from 
Azure AI with a context window of 131K tokens and max output of 131K tokens. Pricing starts at 0.20 per million input tokens and 0.50 per million output tokens (cheapest at Azure AI).
Capabilities
✗ Vision✓ Function Calling✓ Reasoning✓ JSON Schema✗ System Messages✓ Web Search✗ Prompt Caching✗ Audio Input✗ Audio Output
Specifications
| Model Key | azure_ai/grok-4-1-fast-reasoning |
| Provider | Azure AI |
| Provider ID | azure_ai |
| Mode | Text |
| Canonical Name | grok-4.1-fast |
| Context Window | 131K tokens |
| Max Output | 131K tokens |
Pricing
| Type | Per 1K Tokens | Per 1M Tokens |
|---|---|---|
| Input Tokens | 0.000200 | 0.200 |
| Output Tokens | 0.000500 | 0.500 |
Price Comparison by Provider
Compare prices for Grok 4 1 Fast Reasoning 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-4-1-fast | 0.200 | 0.500 |
 Perplexity | perplexity/xai/grok-4-1-fast-non-reasoning | N/A | N/A |
| Azure AI | azure_ai/grok-4-1-fast-non-reasoning | 0.200 | 0.500 |
All Variants
All available versions, regions, and API endpoints for Grok 4 1 Fast Reasoning.
Model Key | Provider | Mode | Input Price, $ | Output Price, $ | Context | Max Output | Vision | Functions |
|---|---|---|---|---|---|---|---|---|
| azure_ai/grok-4-1-fast-non-reasoning | Azure AI | Text | 0.200 | 0.500 | 131K | 131K | no | yes |
| azure_ai/grok-4-1-fast-reasoning | Azure AI | Text | 0.200 | 0.500 | 131K | 131K | no | yes |
| perplexity/xai/grok-4-1-fast-non-reasoning | Perplexity | Other | N/A | N/A | N/A | N/A | no | yes |
| xai/grok-4-1-fast | xAI | Text | 0.200 | 0.500 | 2.0M | 2.0M | yes | yes |
| xai/grok-4-1-fast-non-reasoning | xAI | Text | 0.200 | 0.500 | 2.0M | 2.0M | yes | yes |
| xai/grok-4-1-fast-non-reasoning-latest | xAI | Text | 0.200 | 0.500 | 2.0M | 2.0M | yes | yes |
| xai/grok-4-1-fast-reasoning | xAI | Text | 0.200 | 0.500 | 2.0M | 2.0M | yes | yes |
| xai/grok-4-1-fast-reasoning-latest | xAI | Text | 0.200 | 0.500 | 2.0M | 2.0M | yes | yes |