xai/grok-4-1-fast-reasoning

Grok 4.1 Fast Reasoning

RoutableGuaranteed 30%+ savings

xAI

Grok 4.1 Fast Reasoning is a latency-optimized variant of Grok 4 prioritizing speed while retaining strong chain-of-thought performance.

chatvisionreasoningfastazure-foundry

Context

128,000

Input / 1M

$0.2

Output / 1M

$0.5

Providers

Provider	Input / 1M	Output / 1M	Context	RPM	Status
azure-foundry	$0.2	$0.5	128,000	5,000	Routable

Quickstart

curl http://ca-seldon-router.niceglacier-d4ff9f30.centralus.azurecontainerapps.io/v1/chat/completions \
  -H 'Authorization: Bearer $SELDON_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{
    "model": "xai/grok-4-1-fast-reasoning",
    "messages": [{"role": "user", "content": "Hello!"}],
    "max_tokens": 256
  }'