What is the difference between GPT-5.1-Codex and NVIDIA Nemotron 3 Super (free)?

GPT-5.1-Codex is developed by OpenAI while NVIDIA Nemotron 3 Super (free) is developed by NVIDIA. GPT-5.1-Codex has a 400K token context window vs NVIDIA Nemotron 3 Super (free)'s 262K. You can compare their actual outputs across 52 challenges on Rival to see how they differ in practice.

Which is better, GPT-5.1-Codex or NVIDIA Nemotron 3 Super (free)?

It depends on your use case. GPT-5.1-Codex and NVIDIA Nemotron 3 Super (free) each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 52 challenges so you can judge which fits your needs best.

How can I compare GPT-5.1-Codex and NVIDIA Nemotron 3 Super (free) on Rival?

This page shows a side-by-side comparison of GPT-5.1-Codex 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.

What is the difference between GPT-5.1-Codex and NVIDIA Nemotron 3 Super (free)?

GPT-5.1-Codex is developed by OpenAI while NVIDIA Nemotron 3 Super (free) is developed by NVIDIA. GPT-5.1-Codex has a 400K token context window vs NVIDIA Nemotron 3 Super (free)'s 262K. You can compare their actual outputs across 52 challenges on Rival to see how they differ in practice.

Which is better, GPT-5.1-Codex or NVIDIA Nemotron 3 Super (free)?

It depends on your use case. GPT-5.1-Codex and NVIDIA Nemotron 3 Super (free) each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 52 challenges so you can judge which fits your needs best.

How can I compare GPT-5.1-Codex and NVIDIA Nemotron 3 Super (free) on Rival?

This page shows a side-by-side comparison of GPT-5.1-Codex 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.

GPT-5.1-Codex vs NVIDIA Nemotron 3 Super (free): Which Is Better?

Updated Mar 2026

Our Verdict

GPT-5.1-Codex

NVIDIA Nemotron 3 Super (free)Runner-up

No community votes yet. On paper, GPT-5.1-Codex has the edge — bigger model tier, bigger context window, major provider backing.

Too close to call

API pricing

Cost per 1M tokens

GPT-5.1-Codex

Input

$1.25

Output

$10.00

NVIDIA Nemotron 3 Super (free)

Input

—

Output

—

Writing DNA

Style Comparison

Similarity

43%

NVIDIA Nemotron 3 Super (free) uses 19.8x more emoji

GPT-5.1-Codex

NVIDIA Nemotron 3 Super (free)

70%Vocabulary55%

17wSentence Length22w

0.39Hedging0.36

3.4Bold5.1

3.5Lists2.9

0.00Emoji0.20

0.50Headings0.64

0.38Transitions0.17

Based on 14 + 23 text responses

Research

What we learned reading every model

GPT-5.1-Codex and NVIDIA Nemotron 3 Super (free) have opinions about your brand too.Ask 10 models what they tell people about you. Verbatim receipts.Run the mirror

FAQ

Common questions

Keep exploring

More comparisons

GPT-5.1-Codex vs MiniMax M3New provider

GPT-5.1-Codex vs Claude Opus 4.1New provider

NVIDIA Nemotron 3 Super (free) vs Llama 4 MaverickNew provider

Updated Mar 2026

Our Verdict

GPT-5.1-Codex

NVIDIA Nemotron 3 Super (free)Runner-up

No community votes yet. On paper, GPT-5.1-Codex has the edge — bigger model tier, bigger context window, major provider backing.

Too close to call

API pricing

Cost per 1M tokens

GPT-5.1-Codex

Input

$1.25

Output

$10.00

NVIDIA Nemotron 3 Super (free)

Input

—

Output

—

Writing DNA

Style Comparison

Similarity

43%

NVIDIA Nemotron 3 Super (free) uses 19.8x more emoji

GPT-5.1-Codex

NVIDIA Nemotron 3 Super (free)

70%Vocabulary55%

17wSentence Length22w

0.39Hedging0.36

3.4Bold5.1

3.5Lists2.9

0.00Emoji0.20

0.50Headings0.64

0.38Transitions0.17

Based on 14 + 23 text responses

Research

What we learned reading every model

GPT-5.1-Codex and NVIDIA Nemotron 3 Super (free) have opinions about your brand too.Ask 10 models what they tell people about you. Verbatim receipts.Run the mirror

FAQ

Common questions

Keep exploring

More comparisons

GPT-5.1-Codex vs MiniMax M3New provider

GPT-5.1-Codex vs Claude Opus 4.1New provider

NVIDIA Nemotron 3 Super (free) vs Llama 4 MaverickNew provider