Grok 4.1 Fast

xai· 2025-11-19· 2M ctx

API onlytool callreasoning quant: unknown

spread (output)

20×

$0.500 – $10.00 · 3 providers

3 providers priced · 7 omitted (stale)

Provider	Input	Output	Cache rd	Blended
ZenMux relay router	$0.200	$0.500	$0.050	$0.132
Abacusstale relay router	$0.200	$0.500	—	$0.227^*
Azurestale hyperscaler	$0.200	$0.500	$0.050	$0.132
Azurestale hyperscaler	$0.200	$0.500	$0.050	$0.132
FrogBotstale relay router	$0.200	$0.500	$0.050	$0.132
FrogBotstale relay router	$0.200	$0.500	$0.050	$0.132
Ofox relay router	$0.200	$0.500	$0.050	$0.132
Perplexity Agentstale unknown	$0.200	$0.500	$0.050	$0.132
FrogBotstale relay router	$0.200	$1.50	$0.020	$0.204
302.AI relay router	$2.00	$10.00	—	$2.73^*

Cheapest (output)

ZenMux

$0.500 /M

opencode.json

{
  "provider": {
    "zenmux": {
      "npm": "@ai-sdk/openai-compatible",
      "options": {
        "baseURL": "https://zenmux.ai/api/v1"
      },
      "models": {
        "x-ai/grok-4.1-fast": {}
      }
    }
  }
}

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

Output $/M over time7-day preview

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

Full price history & dynamics

This is a 7-day preview. Sign in for 30 days free; the full series and export are the API subscription.

Data: models.dev (MIT), snapshot 2026-09-19. Prices are vendor-published; verify before purchase. Methodology.