preview

Grok 4.20 (Reasoning)

xai/grok-4-20-reasoning

Prices

Input: $1.25 per 1M tokens
low
Input (>200k ctx): $2.50 per 1M tokens
low
Input (batch, >200k ctx): $2.00 per 1M tokens
low
Input (batch): $1.00 per 1M tokens
low
Input (cached read, >200k ctx): $0.40 per 1M tokens
low
Input (cached read, batch, >200k ctx): $0.32 per 1M tokens
low
Input (cached read, batch): $0.16 per 1M tokens
low
Input (cached read): $0.20 per 1M tokens
low
Input (image tokens): $1.25 per 1M tokens
low
Output: $2.50 per 1M tokens
low
Output (>200k ctx): $5.00 per 1M tokens
low
Output (batch, >200k ctx): $4.00 per 1M tokens
low
Output (batch): $2.00 per 1M tokens
low

Also available on

The same model, sold by someone else. The price above is the maker's own.

6 sales channels for this model.
Channel	What	Price
Google Vertex AI	Input	$1.25 per 1M tokens
	Input (>200k ctx)	$2.50 per 1M tokens
	Input (cached read, >200k ctx)	$0.40 per 1M tokens
	Input (cached read)	$0.20 per 1M tokens
	Output	$2.50 per 1M tokens
	Output (>200k ctx)	$5.00 per 1M tokens
Google Vertex AI · vertex-ai	Input	$1.25 per 1M tokens
	Input (>200k ctx)	$2.50 per 1M tokens
	Input (cached read, >200k ctx)	$0.40 per 1M tokens
	Input (cached read)	$0.20 per 1M tokens
	Output	$2.50 per 1M tokens
	Output (>200k ctx)	$5.00 per 1M tokens
Microsoft Azure	Input	$2.00 per 1M tokens
	Output	$6.00 per 1M tokens
Microsoft Azure · azure-ai	Input	$1.25 per 1M tokens
	Input (cached read)	$1.25 per 1M tokens
	Output	$2.50 per 1M tokens
Other · google-vertex	Input	$1.25 per 1M tokens
	Input (>200k ctx)	$2.50 per 1M tokens
	Input (cached read, >200k ctx)	$0.40 per 1M tokens
	Input (cached read)	$0.20 per 1M tokens
	Output	$2.50 per 1M tokens
	Output (>200k ctx)	$5.00 per 1M tokens
Other · vercel	Input	$1.25 per 1M tokens
	Input (>200.001k ctx)	$2.50 per 1M tokens
	Input (cached read, >200.001k ctx)	$0.40 per 1M tokens
	Input (cached read)	$0.20 per 1M tokens
	Output	$2.50 per 1M tokens
	Output (>200.001k ctx)	$5.00 per 1M tokens

Specifications

Provider: xai
Context window: 1,000,000
Max output tokens: 1,000,000
Open weights: no
Released: 03/09/2026
Retires: 04/06/2027
First seen by this tracker: 09/14/2026

Price history

No price of this model has changed since we started tracking it.

Input (cached read): 0.2 per 1M tokens, unchanged since 09/14/2026
Input: 1.25 per 1M tokens, unchanged since 09/14/2026
Output: 2.5 per 1M tokens, unchanged since 09/14/2026
Input (>200k ctx): 2.5 per 1M tokens, unchanged since 09/14/2026
Output (>200k ctx): 5 per 1M tokens, unchanged since 09/14/2026
Input (cached read, >200k ctx): 0.4 per 1M tokens, unchanged since 09/14/2026
Input (image tokens): 1.25 per 1M tokens, unchanged since 09/23/2026
Input (cached read, batch): 0.16 per 1M tokens, unchanged since 09/26/2026
Input (batch): 1 per 1M tokens, unchanged since 09/26/2026
Output (batch): 2 per 1M tokens, unchanged since 09/26/2026
Input (batch, >200k ctx): 2 per 1M tokens, unchanged since 09/26/2026
Output (batch, >200k ctx): 4 per 1M tokens, unchanged since 09/26/2026
Input (cached read, batch, >200k ctx): 0.32 per 1M tokens, unchanged since 09/26/2026

Last updated 10/03/2026, 02:10