grok-4-1-fast-non-reasoning — API, Pricing & Context Window | Vivgrid

grok-4-1-fast-non-reasoning — API, Pricing & Context Window

grok-4-1-fast-non-reasoning is the low-latency variant of xAI's Grok 4.1 fast line, optimized for quick responses without extended reasoning. It keeps the same massive 2M-token context window and image input, prioritizing speed for high-throughput workloads.

Vivgrid serves grok-4-1-fast-non-reasoning through its unified, OpenAI-compatible API and single billing surface.

Specifications
Provider xAI
Model ID grok-4-1-fast-non-reasoning
Best for General-purpose
Context window 2,000,000 tokens
Modalities Text, Image
Tool / function calling Yes
Knowledge cutoff 2025-07
Acceleration 🌐 Global (Centralized)

Pricing

Pricing for grok-4-1-fast-non-reasoning matches the provider's published rates. See live pricing in the Vivgrid Console.

Quick start

Call grok-4-1-fast-non-reasoning through Vivgrid's unified, OpenAI-compatible endpoint. Get an API key from the Vivgrid Console.

curl https://api.vivgrid.com/v1/chat/completions \
  -H "Authorization: Bearer $VIVGRID_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "grok-4-1-fast-non-reasoning",
    "messages": [\
      { "role": "user", "content": "Say hello in English, Chinese and Spanish." }\
    ],
    "stream": true
  }'

Ideal use cases

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