How much does the Grok 4.3 API cost?

Grok 4.3 lists at $1.25 per million input tokens and $2.5 per million output tokens as of August 2026. On a realistic task of 1,500 input and 500 output tokens across 3 calls, that is $0.00938 per task, or $9,375 per million tasks.

Is Grok 4.3 expensive compared to other models?

Grok 4.3 ranks #4 of 10 tracked models on cost per task. It costs 5.95x more than the cheapest tracked model (Mistral Small), while the most expensive (GPT-5.5) costs 7.20x more than it.

When does self-hosting beat the Grok 4.3 API?

Against a $2/hour dedicated GPU ($1,460/month), self-hosting becomes cheaper than Grok 4.3 above 155,733 tasks per month, within that box's physical capacity of 788,400 tasks.

Model pricing · xAI · mid tier · August 2026

Grok 4.3 API pricing, in numbers that matter

List price, real cost per task, rank against the field, and the self-hosting break-even, all computed from our open dataset.

Input, $/1M tokens

$1.25

Output, $/1M tokens

$2.5

Cost per task

$0.00938

Cost rank

#4 of 10

The task profile behind every figure: 1,500 input and 500 output tokens per call, 3 calls per task. On that profile Grok 4.3 costs $0.00938 per task and $9,375 per million tasks. Output is billed at 2x the input rate, so despite the profile sending three times more input than output, output makes up 40% of the bill. Input and output carry comparable weight here, so prompt caching and context trimming return nearly as much as output caps.

Grok 4.3 against the field

#	Model	$/task	vs Grok 4.3	Head-to-head
1	Mistral Small	$0.00158	0.17x	compare
2	DeepSeek-V4-Flash	$0.00396	0.42x	compare
3	Gemini 2.5 Flash	$0.00510	0.54x	compare
4	Grok 4.3	$0.00938	-	-
5	GPT-5.4 mini	$0.01013	1.08x	compare
6	Claude Haiku 4.5	$0.01200	1.28x	compare
7	Claude Sonnet 5	$0.02400	2.56x	compare
8	Gemini 3.1 Pro	$0.02700	2.88x	compare
9	Claude Opus 4.8	$0.06000	6.40x	compare
10	GPT-5.5	$0.06750	7.20x	compare

Self-hosting break-even

Against a reference $2/hour dedicated instance ($1,460/month fixed, 788,400 tasks/month capacity at full utilisation), the break-even against Grok 4.3 is 155,733 tasks per month. That sits inside the box's capacity, so past that volume self-hosting genuinely wins on cost. Work through your own numbers in the $/task calculator or the break-even guide.

Frequently asked

How much does the Grok 4.3 API cost?: Grok 4.3 lists at $1.25 per million input tokens and $2.5 per million output tokens as of August 2026. On a realistic task of 1,500 input and 500 output tokens across 3 calls, that is $0.00938 per task, or $9,375 per million tasks.
Is Grok 4.3 expensive compared to other models?: Grok 4.3 ranks #4 of 10 tracked models on cost per task. It costs 5.95x more than the cheapest tracked model (Mistral Small), while the most expensive (GPT-5.5) costs 7.20x more than it.
When does self-hosting beat the Grok 4.3 API?: Against a $2/hour dedicated GPU ($1,460/month), self-hosting becomes cheaper than Grok 4.3 above 155,733 tasks per month, within that box's physical capacity of 788,400 tasks.