xAI: Grok 4.1 Fast
x-ai/grok-4.1-fast
Created Dec 13, 2025|2M context|$0.20/M input tokens|$0.50/M output tokens
Intel TDX
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.
Providers for xAI: Grok 4.1 Fast
RedPill routes requests to the best providers that are able to handle your prompt size and parameters, with fallbacks to maximize uptime.
x-ai
Input Price
$0.20
Output Price
$0.50
Total Context
2M
API
RedPill provides an OpenAI-compatible completion API to all models & providers that you can call directly, or using the OpenAI SDK. Additionally, some third-party SDKs are available.
fetch("https://api.redpill.ai/v1/chat/completions", {
method: "POST",
headers: {
"Authorization": "Bearer <YOUR-REDPILL-API-KEY>",
"Content-Type": "application/json"
},
body: JSON.stringify({
"model": "x-ai/grok-4.1-fast",
"messages": [
{
"role": "user",
"content": "What is the meaning of life?"
}
]
})
})