What is the difference between GPT-6 Astra Pro and Mistral Medium 3.1?

GPT-6 Astra Pro is developed by OpenAI while Mistral Medium 3.1 is developed by Mistral AI. GPT-6 Astra Pro has a 1.1M token context window vs Mistral Medium 3.1's 131K. 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 Mistral Medium 3.1?

It depends on your use case. GPT-6 Astra Pro and Mistral Medium 3.1 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 Mistral Medium 3.1?

GPT-6 Astra Pro costs $10/M input tokens and Mistral Medium 3.1 costs $0.4/M input tokens. Mistral Medium 3.1 is $9.60/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 Mistral Medium 3.1 on Rival?

This page shows a side-by-side comparison of GPT-6 Astra Pro and Mistral Medium 3.1 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 ProvsMistral Medium 3.1

Mistral Medium 3.1 is cheaper than GPT-6 Astra Pro at $0.4/M vs $10/M input tokens.

GPT-6 Astra Pro and Mistral Medium 3.1 compared across 6 shared prompts
Spec	GPT-6 Astra Pro	Mistral Medium 3.1
Input price	$10/M tokens	$0.4/M tokens
Output price	$50/M tokens	$2/M tokens
Context window	1.1M tokens	131K tokens
Weights	Closed	—
Free API (OpenRouter)	No	No
Released	Sep 2026	Aug 2025

Our Verdict

GPT-6 Astra Pro

Mistral Medium 3.1Runner-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.

Mistral Medium 3.1 costs 25x less per token.

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

Mistral Medium 3.1

Input

$0.40

25× cheaper

Output

$2.00

25× cheaper

Mistral Medium 3.1 is cheaper on both: 25× input, 25× output.

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

Mistral Medium 3.11 host

HostInOutContextUptime

Mistral$0.44 in$2.20 out131k99.9% 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 Mistral Medium 3.1?

Which is better, GPT-6 Astra Pro or Mistral Medium 3.1?

How much does GPT-6 Astra Pro cost compared to Mistral Medium 3.1?

How can I compare GPT-6 Astra Pro and Mistral Medium 3.1 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 Mistral Medium 3.1?

Which is better, GPT-6 Astra Pro or Mistral Medium 3.1?

How much does GPT-6 Astra Pro cost compared to Mistral Medium 3.1?

How can I compare GPT-6 Astra Pro and Mistral Medium 3.1 on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages