What is the difference between GPT-5.6 Luna Pro and Llama 3.1 405B?

GPT-5.6 Luna Pro is developed by OpenAI while Llama 3.1 405B is developed by Meta AI. GPT-5.6 Luna Pro has a 1.1M token context window vs Llama 3.1 405B's 128K. You can compare their actual outputs across 12 challenges on Rival to see how they differ in practice.

Which is better, GPT-5.6 Luna Pro or Llama 3.1 405B?

It depends on your use case. GPT-5.6 Luna Pro and Llama 3.1 405B each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 12 challenges so you can judge which fits your needs best.

How much does GPT-5.6 Luna Pro cost compared to Llama 3.1 405B?

GPT-5.6 Luna Pro costs $1/M input tokens and Llama 3.1 405B costs $2.7/M input tokens. GPT-5.6 Luna Pro is $1.70/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 Llama 3.1 405B on Rival?

This page shows a side-by-side comparison of GPT-5.6 Luna Pro and Llama 3.1 405B 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 Llama 3.1 405B?

GPT-5.6 Luna Pro is developed by OpenAI while Llama 3.1 405B is developed by Meta AI. GPT-5.6 Luna Pro has a 1.1M token context window vs Llama 3.1 405B's 128K. You can compare their actual outputs across 12 challenges on Rival to see how they differ in practice.

Which is better, GPT-5.6 Luna Pro or Llama 3.1 405B?

It depends on your use case. GPT-5.6 Luna Pro and Llama 3.1 405B each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 12 challenges so you can judge which fits your needs best.

How much does GPT-5.6 Luna Pro cost compared to Llama 3.1 405B?

GPT-5.6 Luna Pro costs $1/M input tokens and Llama 3.1 405B costs $2.7/M input tokens. GPT-5.6 Luna Pro is $1.70/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 Llama 3.1 405B on Rival?

This page shows a side-by-side comparison of GPT-5.6 Luna Pro and Llama 3.1 405B 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 Llama 3.1 405B: Which Is Better?

Updated Jul 2026

Our Verdict

GPT-5.6 Luna Pro

Llama 3.1 405B

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Too close to call

What do GPT-5.6 Luna Pro and Llama 3.1 405B 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

2.7× cheaper

Output

$6.00

Llama 3.1 405B

Input

$2.70

Output

$3.10

1.9× cheaper

GPT-5.6 Luna Pro wins input (2.7× cheaper)·Llama 3.1 405B wins output (1.9× cheaper)

Writing DNA

Style Comparison

Similarity

46%

GPT-5.6 Luna Pro uses 286.7x more bold

GPT-5.6 Luna Pro

Llama 3.1 405B

58%Vocabulary56%

18wSentence Length15w

0.81Hedging0.41

2.9Bold0.0

5.1Lists1.9

0.54Emoji0.03

1.10Headings0.00

0.09Transitions0.16

Based on 27 + 5 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Llama 3.1 405B vs MiniMax M3New provider

Llama 3.1 405B vs Ox AlphaNew provider

Llama 3.1 405B vs Claude Opus 4New provider

Updated Jul 2026

Our Verdict

GPT-5.6 Luna Pro

Llama 3.1 405B

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Too close to call

What do GPT-5.6 Luna Pro and Llama 3.1 405B 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

2.7× cheaper

Output

$6.00

Llama 3.1 405B

Input

$2.70

Output

$3.10

1.9× cheaper

GPT-5.6 Luna Pro wins input (2.7× cheaper)·Llama 3.1 405B wins output (1.9× cheaper)

Writing DNA

Style Comparison

Similarity

46%

GPT-5.6 Luna Pro uses 286.7x more bold

GPT-5.6 Luna Pro

Llama 3.1 405B

58%Vocabulary56%

18wSentence Length15w

0.81Hedging0.41

2.9Bold0.0

5.1Lists1.9

0.54Emoji0.03

1.10Headings0.00

0.09Transitions0.16

Based on 27 + 5 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Llama 3.1 405B vs MiniMax M3New provider

Llama 3.1 405B vs Ox AlphaNew provider

Llama 3.1 405B vs Claude Opus 4New provider