What is the difference between GPT-5.6 Luna Pro and o3 Mini?

Both are developed by OpenAI but target different use cases. GPT-5.6 Luna Pro has a 1.1M token context window vs o3 Mini's 64K. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, GPT-5.6 Luna Pro or o3 Mini?

It depends on your use case. GPT-5.6 Luna Pro and o3 Mini each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 53 challenges so you can judge which fits your needs best.

How much does GPT-5.6 Luna Pro cost compared to o3 Mini?

GPT-5.6 Luna Pro costs $1/M input tokens and o3 Mini costs $1.1/M input tokens. GPT-5.6 Luna Pro is $0.10/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-5.6 Luna Pro and o3 Mini on Rival?

This page shows a side-by-side comparison of GPT-5.6 Luna Pro and o3 Mini 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.

What is the difference between GPT-5.6 Luna Pro and o3 Mini?

Both are developed by OpenAI but target different use cases. GPT-5.6 Luna Pro has a 1.1M token context window vs o3 Mini's 64K. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, GPT-5.6 Luna Pro or o3 Mini?

It depends on your use case. GPT-5.6 Luna Pro and o3 Mini each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 53 challenges so you can judge which fits your needs best.

How much does GPT-5.6 Luna Pro cost compared to o3 Mini?

GPT-5.6 Luna Pro costs $1/M input tokens and o3 Mini costs $1.1/M input tokens. GPT-5.6 Luna Pro is $0.10/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-5.6 Luna Pro and o3 Mini on Rival?

This page shows a side-by-side comparison of GPT-5.6 Luna Pro and o3 Mini 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.

GPT-5.6 Luna Pro vs o3 Mini: Which Is Better?

Updated Jul 2026

Our Verdict

GPT-5.6 Luna Pro

o3 MiniRunner-up

No community votes yet. On paper, GPT-5.6 Luna Pro has the edge — bigger model tier, newer, bigger context window.

Slight edge

What do GPT-5.6 Luna Pro and o3 Mini say about your brand?

10 models, one question, verbatim receipts.

or peek at a demo: Notion Linear Vercel

API pricing

Cost per 1M tokens

GPT-5.6 Luna Pro

Input

$1.00

1.1× cheaper

Output

$6.00

o3 Mini

Input

$1.10

Output

$4.40

1.4× cheaper

GPT-5.6 Luna Pro wins input (1.1× cheaper)·o3 Mini wins output (1.4× cheaper)

Writing DNA

Style Comparison

Similarity

67%

GPT-5.6 Luna Pro uses 53.7x more emoji

GPT-5.6 Luna Pro

o3 Mini

58%Vocabulary65%

18wSentence Length17w

0.81Hedging0.74

2.9Bold3.9

5.1Lists1.7

0.54Emoji0.00

1.10Headings0.47

0.09Transitions0.38

Based on 27 + 12 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

o3 Mini vs MiniMax M3New provider

o3 Mini vs Ox AlphaNew provider

o3 Mini vs Claude Opus 4New provider

Updated Jul 2026

Our Verdict

GPT-5.6 Luna Pro

o3 MiniRunner-up

No community votes yet. On paper, GPT-5.6 Luna Pro has the edge — bigger model tier, newer, bigger context window.

Slight edge

What do GPT-5.6 Luna Pro and o3 Mini say about your brand?

10 models, one question, verbatim receipts.

or peek at a demo: Notion Linear Vercel

API pricing

Cost per 1M tokens

GPT-5.6 Luna Pro

Input

$1.00

1.1× cheaper

Output

$6.00

o3 Mini

Input

$1.10

Output

$4.40

1.4× cheaper

GPT-5.6 Luna Pro wins input (1.1× cheaper)·o3 Mini wins output (1.4× cheaper)

Writing DNA

Style Comparison

Similarity

67%

GPT-5.6 Luna Pro uses 53.7x more emoji

GPT-5.6 Luna Pro

o3 Mini

58%Vocabulary65%

18wSentence Length17w

0.81Hedging0.74

2.9Bold3.9

5.1Lists1.7

0.54Emoji0.00

1.10Headings0.47

0.09Transitions0.38

Based on 27 + 12 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

o3 Mini vs MiniMax M3New provider

o3 Mini vs Ox AlphaNew provider

o3 Mini vs Claude Opus 4New provider