Grok 4.1 Fast Reasoning
xAI
- Language
- Reasoning
- File input
- Vision
- Tool use
- Implicit caching
- Context
- 1M
- Max output
- 1M
- Input / 1M
- $0.200
- Output / 1M
- $0.500
Quickstart
Point any OpenAI-compatible client at Maxynetic Systems and pass spacexai/grok-4.1-fast-reasoning as the model.
curl https://api.maxynetic.com/v1/chat/completions \
-H "Authorization: Bearer $MAXYNETIC_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "spacexai/grok-4.1-fast-reasoning",
"messages": [{ "role": "user", "content": "Explain routing in one line." }]
}'Pricing
Billed per token with no markup on the underlying provider rate.
Input
Per 1M prompt tokens
$0.200
Output
Per 1M completion tokens
$0.500
Cache read
Per 1M cached prompt tokens
$0.050
A 1M-token prompt with 250K tokens of output costs about $0.325.