Grok 4.1 Fast (Reasoning)

xai· 2025-11-19· 2M ctx

API onlytool callreasoningstructured quant: unknown

spread (output)

1.1×

$0.450 – $0.500 · 9 providers

9 providers priced

Provider	Input	Output	Cache rd	Blended
Jiekou.AI relay router	$0.180	$0.450	—	$0.205^*
Azure hyperscaler	$0.200	$0.500	$0.050	$0.132
FrogBot relay router	$0.200	$0.500	$0.050	$0.132
Vertex hyperscaler	$0.200	$0.500	$0.050	$0.132
Helicone relay router	$0.200	$0.500	$0.050	$0.132
DevPass (LLM Gateway) relay router	$0.200	$0.500	$0.050	$0.132
LLM Gateway relay router	$0.200	$0.500	—	$0.227^*
302.AI relay router	$0.200	$0.500	—	$0.227^*
Vercel AI Gateway unknown	$0.200	$0.500	$0.050	$0.132

Cheapest (output)

Jiekou.AI

$0.450 /M

opencode.json

{
  "provider": {
    "jiekou": {
      "npm": "@ai-sdk/openai-compatible",
      "options": {
        "baseURL": "https://api.jiekou.ai/openai"
      },
      "models": {
        "grok-4-1-fast-reasoning": {}
      }
    }
  }
}

Set JIEKOU_API_KEY in your environment. Generated — verify against the OpenCode docs.

Output $/M over time

Median line, min–max band. Pre-2026-09 points are catalog-recorded dates from models.dev git history, not provider effective dates.

Data: models.dev (MIT), snapshot 2026-09-20. Prices are vendor-published; verify before purchase. Methodology.