Grok 4 1 Fast
xAIText
Grok 4 1 Fast is a text model from xAI with a context window of 2.0M tokens and max output of 2.0M tokens. Pricing starts at $0.20 per million input tokens and $0.50 per million output tokens.
Specifications
| Model Key | xai/grok-4-1-fast |
| Provider | xAI |
| LiteLLM Provider | xai |
| Mode | Text |
| Canonical Name | grok-fast-4.1 |
| Context Window | 2.0M tokens |
| Max Output | 2.0M tokens |
Capabilities
✓ Vision✓ Function Calling✓ Reasoning✓ JSON Schema✗ System Messages✓ Web Search✗ Prompt Caching✓ Audio Input✗ Audio Output
Pricing
| Type | Per 1K Tokens | Per 1M Tokens |
|---|---|---|
| Input Tokens | $0.000200 | $0.200 |
| Output Tokens | $0.000500 | $0.500 |
| Cache Read (Input) | $0.000050 | $0.050 |
Similar Models
Models with similar capabilities and context window size.
Model | Provider | Mode | Input Price | Output Price | Context | Max Output | Vision | Functions |
|---|---|---|---|---|---|---|---|---|
| Gemini 1.5 Pro-exp-0827 | Google Gemini | Text | N/A | N/A | 2.1M | 8K | yes | yes |
| Gemini 2.0 Pro-exp-02-05 | Google Gemini | Text | N/A | N/A | 2.1M | 8K | yes | yes |
| Gemini Experimental 1206 | Google Gemini | Text | N/A | N/A | 2.1M | 8K | yes | yes |
| Grok 4 1 Fast Non Reasoning | xAI | Text | $0.200 | $0.500 | 2.0M | 2.0M | yes | yes |
| Grok 4 1 Fast Non Reasoning | xAI | Text | $0.200 | $0.500 | 2.0M | 2.0M | yes | yes |
| Grok 4 1 Fast Reasoning | xAI | Text | $0.200 | $0.500 | 2.0M | 2.0M | yes | yes |
| Grok 4 1 Fast Reasoning | xAI | Text | $0.200 | $0.500 | 2.0M | 2.0M | yes | yes |
| Grok 4 Fast Non Reasoning | xAI | Text | $0.200 | $0.500 | 2.0M | 2.0M | no | yes |
| Grok 4 Fast Reasoning | xAI | Text | $0.200 | $0.500 | 2.0M | 2.0M | no | yes |
| Grok 4 Fast:free | OpenRouter | Text | N/A | N/A | 2.0M | 30K | no | yes |