vertex-openai/grok-4-20-reasoning

vertex-openai· 2M ctx

API onlytool callreasoning quant: unknown

spread (output)

2.4×

$2.50 – $6.00 · 5 providers

5 providers priced

Provider	Input	Output	Cache rd	Blended
Vertextiered hyperscaler	$1.25	$2.50	$0.200	$0.696
DevPass (LLM Gateway)tiered relay router	$1.25	$2.50	$0.200	$0.696
LLM Gatewaytiered relay router	$1.25	$2.50	$0.200	$0.696
Vercel AI Gateway unknown	$1.25	$2.50	$0.200	$0.696
Azureoutlier hyperscaler	$2.00	$6.00	—	$2.36^*

Cheapest (output)

Vertex

$2.50 /M

opencode.json

{
  "provider": {
    "google-vertex": {
      "npm": "@ai-sdk/google-vertex",
      "models": {
        "xai/grok-4.20-reasoning": {}
      }
    }
  }
}

Set GOOGLE_VERTEX_PROJECT, GOOGLE_VERTEX_LOCATION, GOOGLE_APPLICATION_CREDENTIALS 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 2026-09-20. Prices are vendor-published; verify before purchase. Methodology.