How much does Grok 4 Fast Reasoning cost?

The lowest price for Grok 4 Fast Reasoning is $0.50 /1M, at LaoZhang API.

Which provider offers Grok 4 Fast Reasoning cheapest?

LaoZhang API, at $0.50 /1M. 3 providers serve Grok 4 Fast Reasoning; the table above lists every one with its price.

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

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

Grok 4 Fast Reasoning is a text model by xAI. 3 providers serve it, from $0.50 to $2.50 /1M; the lowest price is at LaoZhang API.

Lowest price$0.50/1Mat LaoZhang API

Maker's price—The maker does not sell it

Providers3

Context—

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.
3 providers serve it; 52% 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
Helicone	$0.20/1M	From$0.50/1M	$0.05/1M	—
LaoZhang API	$0.20/1M	$0.50/1M	—	—
AI/ML API	$1.25/1M	$2.50/1M	$0.20/1M	—

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 Fast Reasoningthis model	$0.50/1M	—	—	3
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