What is the difference between GPT-6 Astra Pro and NVIDIA Nemotron 3 Super (free)?

GPT-6 Astra Pro is developed by OpenAI while NVIDIA Nemotron 3 Super (free) is developed by NVIDIA. GPT-6 Astra Pro has a 1.1M token context window vs NVIDIA Nemotron 3 Super (free)'s 262K. You can compare their actual outputs across 6 challenges on Rival to see how they differ in practice.

Which is better, GPT-6 Astra Pro or NVIDIA Nemotron 3 Super (free)?

It depends on your use case. GPT-6 Astra Pro and NVIDIA Nemotron 3 Super (free) each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 6 challenges so you can judge which fits your needs best.

How can I compare GPT-6 Astra Pro and NVIDIA Nemotron 3 Super (free) on Rival?

This page shows a side-by-side comparison of GPT-6 Astra Pro and NVIDIA Nemotron 3 Super (free) across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

Updated Sep 2026

GPT-6 Astra ProvsNVIDIA Nemotron 3 Super (free)

GPT-6 Astra Pro has a larger context window than NVIDIA Nemotron 3 Super (free) (1.1M tokens vs 262K tokens).

GPT-6 Astra Pro and NVIDIA Nemotron 3 Super (free) compared across 6 shared prompts
Spec	GPT-6 Astra Pro	NVIDIA Nemotron 3 Super (free)
Input price	$10/M tokens	—
Output price	$50/M tokens	—
Context window	1.1M tokens	262K tokens
Weights	Closed	Open
Free API (OpenRouter)	No	Yes (1 provider)
Released	Sep 2026	Mar 2026

Our Verdict

GPT-6 Astra Pro

NVIDIA Nemotron 3 Super (free)Runner-up

Not enough votes to call it. On the specs, GPT-6 Astra Pro has the edge: bigger model tier, newer, bigger context window, major provider backing.

Slight edge

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

GPT-6 Astra Pro

Input

$10.00

Output

$50.00

NVIDIA Nemotron 3 Super (free)

Input

—

Output

—

Where to run it

3 hosts

GPT-6 Astra Pro2 hosts

HostInOutContextUptime

Azure AI Foundry$10.00 in$50.00 out1.1M98.9% up OpenAI$10.00 in$50.00 out1.1M99.6% up

NVIDIA Nemotron 3 Super (free)1 host

HostInOutContextUptime

NVIDIA$0 in$0 out262k96.8% up

Per million tokens. Prices and uptime via OpenRouter, checked 16 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

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More comparisons

Cost per 1M tokens

3 hosts

What we learned reading every model

Common questions

What is the difference between GPT-6 Astra Pro and NVIDIA Nemotron 3 Super (free)?

Which is better, GPT-6 Astra Pro or NVIDIA Nemotron 3 Super (free)?

How can I compare GPT-6 Astra Pro and NVIDIA Nemotron 3 Super (free) on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages

Cost per 1M tokens

3 hosts

What we learned reading every model

Common questions

What is the difference between GPT-6 Astra Pro and NVIDIA Nemotron 3 Super (free)?

Which is better, GPT-6 Astra Pro or NVIDIA Nemotron 3 Super (free)?

How can I compare GPT-6 Astra Pro and NVIDIA Nemotron 3 Super (free) on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages