Grok 4.20 (Reasoning)

xai· 2026-03-09· 1M ctx

API onlytool callreasoningstructured quant: unknown

spread (output)

2.4×

$2.50 – $6.00 · 5 providers

5 providers priced

Provider	Input	Output	Cache rd	Blended
Eden AItiered relay router	$1.25	$2.50	$0.200	$0.696
Impossibl relay router	$1.25	$2.50	$0.200	$0.696
Merge Gatewaytiered unknown	$1.25	$2.50	$0.200	$0.696
xAItiered first party lab	$1.25	$2.50	$0.200	$0.696
Cloudflare AI Gatewayoutlier unknown	$2.00	$6.00	$0.200	$1.22

Cheapest (output)

Eden AI

$2.50 /M

opencode.json

{
  "provider": {
    "edenai": {
      "npm": "@ai-sdk/openai-compatible",
      "options": {
        "baseURL": "https://api.edenai.run/v3"
      },
      "models": {
        "xai/grok-4.20-0309-reasoning": {}
      }
    }
  }
}

Set EDENAI_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 2026-09-20. Prices are vendor-published; verify before purchase. Methodology.