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Grok 4.1 Fast Reasoning
xAI's fast reasoning model. 2M token context window for processing massive documents and codebases.
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Specifications
| Provider | xAI |
| Category | Text |
| Context window | 2M tokens |
Pricing (Starter tier)
26.00 credits / 1M input tokens
65.00 credits / 1M output tokens
Higher tiers get volume discounts. See tiers
Quick Start
curl -X POST https://query.genx.sh/api/v1/generate \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "grok-4.1-fast-reasoning",
"params": {
"prompt": "What are the latest developments in AI?"
}
}'
Example Request Body
// POST /api/v1/generate
{
"model": "grok-4.1-fast-reasoning",
"params": {
"prompt": "What are the latest developments in AI?"
}
}