How much does Grok-4-Fast cost?

The lowest price for Grok-4-Fast is $0.50 /1M, at Requesty.

Which provider offers Grok-4-Fast cheapest?

Requesty, at $0.50 /1M. 2 providers serve Grok-4-Fast; the table above lists every one with its price.

Grok-4-Fast reads up to 2M tokens per request.

We have not found Grok-4-Fast's weights published by its maker.

2 API providers serve Grok-4-Fast. Compare their prices above, or open a provider to see everything it offers.

Textby xAIReleased Sep 19, 2025

Grok-4-Fast is a text model by xAI. 2 providers serve it, from $0.50 to $0.50 /1M; the lowest price is at Requesty.

Lowest price$0.50/1Mat Requesty

Maker's price—The maker does not sell it

Providers2

Context2M

Against the 737 text models on the site priced the same way.

Mid-priced: its lowest price is $0.50 /1M against a median of $1.10; 34% of comparable models cost less.
Its 2M-token context window is larger than 99% of them (median 262K), about 3000 pages of text.
On LMArena's Text board it ranks #40 of the 120 comparable models scored there.
2 providers serve it; 36% of comparable models have fewer.

Every provider's list price, read from its own price page or API. A price marked “from” changes with context length, resolution or mode.

Provider	Input	Output	Prompt caching	Context
Requesty	$0.20/1M	From$0.50/1M	$0.05/1M	2M
Azure	$0.20/1M	From$0.50/1M	—	—

Output price by provider, /1M, cheapest first

Prices in US dollars, updated daily from each provider. Prices last checked Oct 25, 2026.

Same kind of model from other makers, at a similar price.

Model	Lowest price	Context	Arena	Providers
Grok-4-Fastthis model	$0.50/1M	2M	1407	2
GLM-5.3	$1.10/1M	1.05M	1623	49
GLM-5.3-Flash	$0.20/1M	1.05M	1608	45
Qwen3.8 27B	$0.50/1M	262K	1591	33
GPT-6 Luna	$0.40/1M	1.05M	1578	28
Sonar	$1/1M	127K	—	9
Claude Haiku 5.5	$0.30/1M	1M	1585	27
MiMo-V2.6-Pro	$0.696/1M	1.05M	1625	21
Qwen3.8 Flash Next	$0.376/1M	262K	1628	5