Name: Grok 4.5
Author: xAI

Question 1

What does this Grok 4.5 vs Grok Build 0.1 comparison cover?

Accepted Answer

It brings together documented inputs and outputs, token limits, deployment terms and available pricing. When both models have source-linked, verified results on a shared benchmark, those results are shown with their individual sources. The comparison is a starting point for evaluating your own workload.

Question 2

Which is cheaper: Grok 4.5 or Grok Build 0.1?

Accepted Answer

Grok 4.5 lists $2.00 input and $6.00 output per 1M tokens. Grok Build 0.1 lists $1.00 input and $2.00 output. The cheaper workload depends on the mix of input and output. Long-context tiers, caching, batch processing and retries can change the bill.

Question 3

Which has the larger context window: Grok 4.5 or Grok Build 0.1?

Accepted Answer

Grok 4.5 lists 500K tokens and Grok Build 0.1 lists 256K. Grok 4.5 therefore has the larger recorded context window, but capacity alone is not a quality score.

Question 4

Which is faster: Grok 4.5 or Grok Build 0.1?

Accepted Answer

There is no matched speed measurement for both models with the same source, host, region and date. Test the same prompts at your expected concurrency and measure time to the first useful response as well as complete task time.

Question 5

What input and output types do Grok 4.5 and Grok Build 0.1 support?

Accepted Answer

Grok 4.5 records text, image input and text output. Grok Build 0.1 records text, image, pdf input and text output. “Not documented” means the current source record is incomplete; it does not prove that a modality is unsupported.

Question 6

Should I choose Grok 4.5 or Grok Build 0.1?

Accepted Answer

Consider Grok 4.5 if you need larger context or larger maximum output. Consider Grok Build 0.1 if you need a lower listed input rate or a lower listed output rate. Test both on the same representative examples and judge the output against your acceptance criteria. Include tool failures, retries and the time to a completed task.

Specification	Grok 4.5	Grok Build 0.1
Provider	xAI	xAI
Listed pricing route	xAI	xAI
Model family	grok	grok-build
Accepted inputs	text, image	text, image, pdf
Produced outputs	text	text
Context window	500KHigher	256K
Max output	500KHigher	256K
Input price / 1M	$2.00	$1.00Lower
Output price / 1M	$6.00	$2.00Lower
Reasoning mode	Documented	Documented
Tool calling	Documented	Documented
Image input	Documented	Documented
Audio input	Not documented	Not documented
Structured output	Documented	Documented
License	Proprietary	Proprietary

Grok 4.5 vs Grok Build 0.1

Grok 4.5

Grok Build 0.1

Key differences

Pricing, limits and capabilities

Which model should you choose?

Documentation and model profiles

Questions people ask

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