Question 1

What does this Nemotron 3 Nano 30B A3B vs GPT-5 Pro 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: Nemotron 3 Nano 30B A3B or GPT-5 Pro?

Accepted Answer

Nemotron 3 Nano 30B A3B lists $0.00 input and $0.00 output per 1M tokens. GPT-5 Pro lists $15.00 input and $120.00 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: Nemotron 3 Nano 30B A3B or GPT-5 Pro?

Accepted Answer

Nemotron 3 Nano 30B A3B lists 262.14K tokens and GPT-5 Pro lists 400K. GPT-5 Pro therefore has the larger recorded context window, but capacity alone is not a quality score.

Question 4

Which is faster: Nemotron 3 Nano 30B A3B or GPT-5 Pro?

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 Nemotron 3 Nano 30B A3B and GPT-5 Pro support?

Accepted Answer

Nemotron 3 Nano 30B A3B records text input and text output. GPT-5 Pro records text, image 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 Nemotron 3 Nano 30B A3B or GPT-5 Pro?

Accepted Answer

Consider Nemotron 3 Nano 30B A3B if you need a lower listed input rate or a lower listed output rate. Consider GPT-5 Pro if you need larger context or larger maximum output. Nemotron 3 Nano 30B A3B offers downloadable weights; GPT-5 Pro is listed as a proprietary model. Compare licence terms and operating costs before choosing a deployment. 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	Nemotron 3 Nano 30B A3B	GPT-5 Pro
Provider	NVIDIA	OpenAI
Listed pricing route	NVIDIA	OpenAI
Model family	nemotron	gpt-pro
Accepted inputs	text	text, image
Produced outputs	text	text
Context window	262.14K	400KHigher
Max output	262.14K	272KHigher
Input price / 1M	$0.00Lower	$15.00
Output price / 1M	$0.00Lower	$120.00
Reasoning mode	Documented	Documented
Tool calling	Documented	Documented
Image input	Not documented	Documented
Audio input	Not documented	Not documented
Structured output	Not documented	Documented
License	Open weights	Proprietary

Nemotron 3 Nano 30B A3B vs GPT-5 Pro

Nemotron 3 Nano 30B A3B

GPT-5 Pro

Key differences

Pricing, limits and capabilities

Which model should you choose?

Documentation and model profiles

Questions people ask

Compare a different pair