Verified 2026-05-15 · sourced from xAI
Grok 4.20 Reasoning Token Calculator, Pricing & 100K/1M Cost
Check xAI Grok 4.20 Reasoning pricing, estimate 100K and 1M token cost, and size a real API budget before you send a single request. Standard pricing is $1.25 per million input tokens and $2.50 per million output tokens with a 2M token context window.
Quick answer: Grok 4.20 Reasoning pricing per 1M tokens is $1.25 input and $2.50 output. Context window: 2,000,000 tokens · Cached input: $0.200 / 1M.
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Context window
2,000,000 tokens
Input price
$1.25 / 1M
Output price
$2.50 / 1M
Cached input
$0.200 / 1M
Usage scenarios
Compare standard and cached pricing (where available) across common workloads.
| Scenario | Tokens in | Tokens out | Total tokens | Standard cost | Cached cost |
|---|---|---|---|---|---|
Quick chat reply Single user question with a short assistant answer | 650 | 220 | 870 | $0.0014 | $0.0007 |
Coding assistant session Multi-turn pair programming exchange (≈6 turns) | 2,600 | 1,400 | 4,000 | $0.0067 | $0.0040 |
Knowledge base response Retrieval-augmented answer referencing multiple passages | 12,000 | 3,000 | 15,000 | $0.0225 | $0.0099 |
Near-max context run Large document processing approaching the 2M token limit | 1,760,000 | 240,000 | 2,000,000 | $2.80 | $0.952 |
Daily & monthly budgeting
Translate usage into predictable operating expenses across popular deployment sizes.
| Profile | Requests/day | Tokens/day | Daily cost | Monthly cost | Cached daily | Cached monthly |
|---|---|---|---|---|---|---|
| Team pilot | 25 | 75,000 | $0.125 | $3.75 | $0.0725 | $2.18 |
| Product launch | 100 | 500,000 | $0.813 | $24.38 | $0.445 | $13.35 |
| Enterprise scale | 500 | 3,000,000 | $5.00 | $150.00 | $2.90 | $87.00 |
Pricing notes
- xAI lists Grok 4.20 reasoning with 2M context and the same token rates as Grok 4.3.
Frequently asked questions
How much does Grok 4.20 Reasoning cost per 1,000 tokens?
At the published rates of $1.25 per million input tokens and $2.50 per million output tokens, a typical 1,000 token request (≈70% input, 30% output) costs about $0.0016.
Does Grok 4.20 Reasoning offer cached input discounts?
Grok 4.20 Reasoning drops input costs to $0.200 per million cached tokens. Using cached contexts, that same 1,000 token call totals $0.0009, a significant saving for chatbots and RAG systems.
What is the context window for Grok 4.20 Reasoning?
Grok 4.20 Reasoning supports up to 2,000,000 tokens (2M), allowing large prompts and retrieval-augmented payloads in a single call.
How fresh is the Grok 4.20 Reasoning pricing data?
Pricing is sourced from https://docs.x.ai/developers/pricing and was last verified on 2026-05-15. The calculator updates automatically when models.json is refreshed.