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  5. GPT-6 Astra ProvsNemotron 3 Nano Omni (free)
Updated Sep 2026

GPT-6 Astra ProvsNemotron 3 Nano Omni (free)

Nemotron 3 Nano Omni (free) is cheaper than GPT-6 Astra Pro at $0/M vs $10/M input tokens.

GPT-6 Astra Pro and Nemotron 3 Nano Omni (free) compared across 2 shared prompts
SpecGPT-6 Astra ProNemotron 3 Nano Omni (free)
Input price$10/M tokensFree
Output price$50/M tokensFree
Context window1.1M tokens256K tokens
WeightsClosed—
Free API (OpenRouter)NoYes (1 provider)
ReleasedSep 2026Apr 2026
Our Verdict
GPT-6 Astra Pro
GPT-6 Astra Pro
Nemotron 3 Nano Omni (free)
Nemotron 3 Nano Omni (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
Nemotron 3 Nano Omni (free)
Input
$0.000
Output
$0.000
Where to run it

3 hosts

GPT-6 Astra Pro2 hosts
HostInOutContextUptime
Azure AI Foundry$10.00 in·$50.00 out·1.1M·99.2% upOpenAI$10.00 in·$50.00 out·1.1M·99.9% up
Nemotron 3 Nano Omni (free)1 host
HostInOutContextUptime
NVIDIAdegraded$0 in·$0 out·256k·77.4% up

Per million tokens. Prices and uptime via OpenRouter, checked 22 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

GPT-6 Astra Pro is developed by OpenAI while Nemotron 3 Nano Omni (free) is developed by NVIDIA. GPT-6 Astra Pro has a 1.1M token context window vs Nemotron 3 Nano Omni (free)'s 256K. You can compare their actual outputs across 2 challenges on Rival to see how they differ in practice.

It depends on your use case. GPT-6 Astra Pro and Nemotron 3 Nano Omni (free) each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 2 challenges so you can judge which fits your needs best.

GPT-6 Astra Pro costs $10/M input tokens and Nemotron 3 Nano Omni (free) costs $0/M input tokens. Nemotron 3 Nano Omni (free) is $10.00/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

This page shows a side-by-side comparison of GPT-6 Astra Pro and Nemotron 3 Nano Omni (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.

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