What is the difference between GPT-6 Astra Pro and OpenAI o3?

Both are developed by OpenAI but target different use cases. 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 OpenAI o3?

It depends on your use case. GPT-6 Astra Pro and OpenAI o3 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 much does GPT-6 Astra Pro cost compared to OpenAI o3?

GPT-6 Astra Pro costs $10/M input tokens and OpenAI o3 costs $10/M input tokens. OpenAI o3 is $0.00/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-6 Astra Pro and OpenAI o3 on Rival?

This page shows a side-by-side comparison of GPT-6 Astra Pro and OpenAI o3 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 ProvsOpenAI o3

GPT-6 Astra Pro is the newer model, released after OpenAI o3.

GPT-6 Astra Pro and OpenAI o3 compared across 6 shared prompts
Spec	GPT-6 Astra Pro	OpenAI o3
Input price	$10/M tokens	$10/M tokens
Output price	$50/M tokens	$40/M tokens
Context window	1.1M tokens	—
Weights	Closed	Closed
Free API (OpenRouter)	No	No
Released	Sep 2026	Apr 2025

Our Verdict

GPT-6 Astra Pro

OpenAI o3

Not enough votes to call it. On the specs, nothing separates them.

Too close to call

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

OpenAI o3

Input

$10.00

Output

$40.00

1.3× cheaper

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

OpenAI o31 host

HostInOutContextUptime

OpenAI$2.00 in$8.00 out200k100% 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

3 hosts

What we learned reading every model

Common questions

What is the difference between GPT-6 Astra Pro and OpenAI o3?

Which is better, GPT-6 Astra Pro or OpenAI o3?

How much does GPT-6 Astra Pro cost compared to OpenAI o3?

How can I compare GPT-6 Astra Pro and OpenAI o3 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 OpenAI o3?

Which is better, GPT-6 Astra Pro or OpenAI o3?

How much does GPT-6 Astra Pro cost compared to OpenAI o3?

How can I compare GPT-6 Astra Pro and OpenAI o3 on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages