x-ai
xAI: Grok 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...
Quality Score
100/100
composite of price, context, capability
Input Price
$0.20
per 1M tokens
Output Price
$0.50
per 1M tokens
Context Window
2,000,000
tokens
- Model ID
- x-ai/grok-4.1-fast
- Vendor
- x-ai
- Tokenizer
- Grok
- Input Modalities
- text, image, file
- Output Modalities
- text
- Max Output
- 30,000 tokens
- Tool Calling
- ✓ supported
- Structured Output
- ✓ supported
- Reasoning Mode
- ✓ supported
- Vision
- ✓ accepts images
- Audio
- no
- Moderated
- no
Strong choice for
Code
SQL Generation
Writing correct, performant SQL from natural-language prompts.
Code
Code Completion
Inline IDE-style autocomplete that has to feel instant.
Code
Code Documentation
Writing clear docstrings and READMEs that match the code.
Data
CSV / Spreadsheet Cleanup
Normalizing messy tabular data with consistent fields.
Writing
Long-Document Summarization
Summarizing books, transcripts, court filings.
Writing
Transcript Cleanup
Turning raw ASR output into readable prose.
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