Grok 4.20 Reasoning
xai/grok-4.20-reasoning
spread (output, p90 ÷ p10)
— too few providers
$2.50 – $6.00 · 3 providers · max÷min 2.4×
Cheapest / median / spread use providers that serve the model on their own capacity: first-party lab, hyperscaler, inference host.
blended = 90.9% input × [(1 − 70% cache) × input + 70% cache × cache-read] + 9.1% × output + cache writes (30% of uncached input) where a write price is published
A provider that publishes no cache price is blended with cache share 0 (all input at the input price) and labelled “no cache price published” — never penalised against identical in/out prices.
| Provider | Input | Output | Cache rd | Blended |
|---|---|---|---|---|
LLM Gatewaytiered router / aggregator | $1.25 | $2.50 | $0.20 | $0.70 |
Vertextiered hyperscaler | $1.25 | $2.50 | $0.20 | $0.70 |
Vercel AI Gateway router / aggregator | $1.25 | $2.50 | $0.20 | $0.70 |
OCI Generative AItiered hyperscaler | $1.25 | $2.50 | $0.20 | $0.70 |
Azure hyperscaler | $2.00 | $6.00 | — | $2.36no cache price published |
Subscription plans (flat fee, not per-token) · 1
Flat-fee plan — the per-token price is bundled into a subscription, so $0/token is not free. Excluded from cheapest, median and spread.
- DevPass (LLM Gateway) grok-4-20-reasoningsubscription plan
Data: models.dev (MIT), snapshot 2026-09-20. Prices are vendor-published; verify before purchase. Methodology.