Question 1

What does this o3 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: o3 or Grok Build 0.1?

Accepted Answer

o3 lists $2.00 input and $8.00 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: o3 or Grok Build 0.1?

Accepted Answer

o3 lists 200K tokens and Grok Build 0.1 lists 256K. Grok Build 0.1 therefore has the larger recorded context window, but capacity alone is not a quality score.

Question 4

Which is faster: o3 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 o3 and Grok Build 0.1 support?

Accepted Answer

o3 records text, image, pdf 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 o3 or Grok Build 0.1?

Accepted Answer

Consider Grok Build 0.1 if you need larger context or larger maximum output or 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	o3	Grok Build 0.1
Provider	OpenAI	xAI
Listed pricing route	OpenAI	xAI
Model family	o	grok-build
Accepted inputs	text, image, pdf	text, image, pdf
Produced outputs	text	text
Context window	200K	256KHigher
Max output	100K	256KHigher
Input price / 1M	$2.00	$1.00Lower
Output price / 1M	$8.00	$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

o3 vs Grok Build 0.1

o3

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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