xAIGrok 4.1 Fast
Grok 4.1 Fast is xAI's best agentic tool calling model that shines in real-world use cases like customer support and deep research. 2M context window.
Reasoning can be enabled/disabled using the reasoning enabled parameter in the API. Learn more in our docs
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Model details
Context window2,000,000 tokens
Max completion size37 tokens
Prompt cost / 1K tokens$0.0000002
Completion cost / 1K tokens$0.0000005
Accepts
Produces
Benchmark performanceAll scores have maximum of 100 points.
All scores have maximum of 100 points.
Overall
84
score
3rd
placement
Cost
97
score
4th
placement
Logic
89
score
3rd
placement
Speed
75
score
22nd
placement
Scoring
34
score
14th
placement
Tool Use
58
score
3rd
placement
Hallucination
89
score
5th
placement
Classification
50
score
1st
placement
Structured Output
92
score
2nd
placement
Pricing
| Usage pricing | |
|---|---|
| Prompt | $0.0000002 |
| Completion | $0.0000005 |
| Request | FREE |
| Image | FREE |
| Web Search | FREE |
| Internal Reasoning | FREE |
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