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

GPT-5.1 Codex Max is developed by OpenAI while Nemotron 3.5 Content Safety is developed by NVIDIA. 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 Max or Nemotron 3.5 Content Safety?

It depends on your use case. GPT-5.1 Codex Max 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 can I compare GPT-5.1 Codex Max and Nemotron 3.5 Content Safety on Rival?

This page shows a side-by-side comparison of GPT-5.1 Codex Max 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 Codex MaxvsNemotron 3.5 Content Safety

Nemotron 3.5 Content Safety is the newer model, released after GPT-5.1 Codex Max.

GPT-5.1 Codex Max and Nemotron 3.5 Content Safety compared across 52 shared prompts
Spec	GPT-5.1 Codex Max	Nemotron 3.5 Content Safety
Input price	—	Free
Output price	—	Free
Context window	—	128K tokens
Weights	Closed	Open
Free API (OpenRouter)	No	Yes (1 provider)
Released	Dec 2025	Jun 2026

Our Verdict

GPT-5.1 Codex Max

Nemotron 3.5 Content SafetyRunner-up

Not enough votes to call it. On the specs, GPT-5.1 Codex Max has the edge: bigger model tier, 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 Max

Input

—

Output

—

Nemotron 3.5 Content Safety

Input

$0.000

Output

$0.000

Where to run it

2 hosts

GPT-5.1 Codex Max1 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 Max and Nemotron 3.5 Content Safety?

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

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

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

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

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages