What is the difference between OpenAI Codex Mini and GPT-5.6 Luna?

Both are developed by OpenAI but target different use cases. OpenAI Codex Mini has a 200K token context window vs GPT-5.6 Luna's 1.1M. You can compare their actual outputs across 10 challenges on Rival to see how they differ in practice.

Which is better, OpenAI Codex Mini or GPT-5.6 Luna?

It depends on your use case. OpenAI Codex Mini and GPT-5.6 Luna each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 10 challenges so you can judge which fits your needs best.

How much does OpenAI Codex Mini cost compared to GPT-5.6 Luna?

OpenAI Codex Mini costs $1.5/M input tokens and GPT-5.6 Luna costs $1/M input tokens. GPT-5.6 Luna is $0.50/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 OpenAI Codex Mini and GPT-5.6 Luna on Rival?

This page shows a side-by-side comparison of OpenAI Codex Mini and GPT-5.6 Luna 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 OpenAI Codex Mini and GPT-5.6 Luna?

Both are developed by OpenAI but target different use cases. OpenAI Codex Mini has a 200K token context window vs GPT-5.6 Luna's 1.1M. You can compare their actual outputs across 10 challenges on Rival to see how they differ in practice.

Which is better, OpenAI Codex Mini or GPT-5.6 Luna?

It depends on your use case. OpenAI Codex Mini and GPT-5.6 Luna each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 10 challenges so you can judge which fits your needs best.

How much does OpenAI Codex Mini cost compared to GPT-5.6 Luna?

OpenAI Codex Mini costs $1.5/M input tokens and GPT-5.6 Luna costs $1/M input tokens. GPT-5.6 Luna is $0.50/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 OpenAI Codex Mini and GPT-5.6 Luna on Rival?

This page shows a side-by-side comparison of OpenAI Codex Mini and GPT-5.6 Luna 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.

OpenAI Codex Mini vs GPT-5.6 Luna: Which Is Better?

Updated Jul 2026

Our Verdict

GPT-5.6 Luna

OpenAI Codex MiniRunner-up

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

Too close to call

What do OpenAI Codex Mini and GPT-5.6 Luna say about your brand?

10 models, one question, verbatim receipts.

or peek at a demo: Notion Linear Vercel

API pricing

Cost per 1M tokens

OpenAI Codex Mini

Input

$1.50

Output

$6.00

GPT-5.6 Luna

Input

$1.00

1.5× cheaper

Output

$6.00

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

OpenAI Codex Mini vs MiniMax M3New provider

OpenAI Codex Mini vs Ox AlphaNew provider

OpenAI Codex Mini vs Claude Opus 4New provider

Updated Jul 2026

Our Verdict

GPT-5.6 Luna

OpenAI Codex MiniRunner-up

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

Too close to call

What do OpenAI Codex Mini and GPT-5.6 Luna say about your brand?

10 models, one question, verbatim receipts.

or peek at a demo: Notion Linear Vercel

API pricing

Cost per 1M tokens

OpenAI Codex Mini

Input

$1.50

Output

$6.00

GPT-5.6 Luna

Input

$1.00

1.5× cheaper

Output

$6.00

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

OpenAI Codex Mini vs MiniMax M3New provider

OpenAI Codex Mini vs Ox AlphaNew provider

OpenAI Codex Mini vs Claude Opus 4New provider