What is the difference between GPT-5.1-Codex and Nemotron 3.5 Content Safety?

GPT-5.1-Codex is developed by OpenAI while Nemotron 3.5 Content Safety is developed by NVIDIA. GPT-5.1-Codex has a 400K token context window vs Nemotron 3.5 Content Safety's 128K. 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 Nemotron 3.5 Content Safety?

It depends on your use case. GPT-5.1-Codex and Nemotron 3.5 Content Safety 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 much does GPT-5.1-Codex cost compared to Nemotron 3.5 Content Safety?

GPT-5.1-Codex costs $1.25/M input tokens and Nemotron 3.5 Content Safety costs $0/M input tokens. Nemotron 3.5 Content Safety is $1.25/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare GPT-5.1-Codex and Nemotron 3.5 Content Safety on Rival?

This page shows a side-by-side comparison of GPT-5.1-Codex and Nemotron 3.5 Content Safety 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 Jun 2026

GPT-5.1-CodexvsNemotron 3.5 Content Safety

Nemotron 3.5 Content Safety is cheaper than GPT-5.1-Codex at $0/M vs $1.25/M input tokens.

GPT-5.1-Codex and Nemotron 3.5 Content Safety compared across 52 shared prompts
Spec	GPT-5.1-Codex	Nemotron 3.5 Content Safety
Input price	$1.25/M tokens	Free
Output price	$10/M tokens	Free
Context window	400K tokens	128K tokens
Weights	Closed	Open
Free API (OpenRouter)	No	Yes (1 provider)
Released	Nov 2025	Jun 2026

Our Verdict

GPT-5.1-Codex

Nemotron 3.5 Content SafetyRunner-up

Not enough votes to call it. On the specs, GPT-5.1-Codex has the edge: bigger model tier, bigger context window, major provider backing.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

GPT-5.1-Codex

Input

$1.25

Output

$10.00

Nemotron 3.5 Content Safety

Input

$0.000

Output

$0.000

Where to run it

2 hosts

GPT-5.1-Codex1 host

HostInOutContextUptime

Azure AI Foundry$1.25 in$10.00 out400k100% up

Nemotron 3.5 Content Safety1 host

HostInOutContextUptime

NVIDIA$0 in$0 out128k94.6% up

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

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Cost per 1M tokens

2 hosts

What we learned reading every model

Common questions

What is the difference between GPT-5.1-Codex and Nemotron 3.5 Content Safety?

Which is better, GPT-5.1-Codex or Nemotron 3.5 Content Safety?

How much does GPT-5.1-Codex cost compared to Nemotron 3.5 Content Safety?

How can I compare GPT-5.1-Codex and Nemotron 3.5 Content Safety on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages

Cost per 1M tokens

2 hosts

What we learned reading every model

Common questions

What is the difference between GPT-5.1-Codex and Nemotron 3.5 Content Safety?

Which is better, GPT-5.1-Codex or Nemotron 3.5 Content Safety?

How much does GPT-5.1-Codex cost compared to Nemotron 3.5 Content Safety?

How can I compare GPT-5.1-Codex and Nemotron 3.5 Content Safety on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages