What is the difference between GPT-4.5 and Llama 3.1 405B?

GPT-4.5 is developed by OpenAI while Llama 3.1 405B is developed by Meta AI. GPT-4.5 has a 128K token context window vs Llama 3.1 405B's 128K. You can compare their actual outputs across 5 challenges on Rival to see how they differ in practice.

Which is better, GPT-4.5 or Llama 3.1 405B?

It depends on your use case. GPT-4.5 and Llama 3.1 405B each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 5 challenges so you can judge which fits your needs best.

How much does GPT-4.5 cost compared to Llama 3.1 405B?

GPT-4.5 costs $75/M input tokens and Llama 3.1 405B costs $2.7/M input tokens. Llama 3.1 405B is $72.30/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-4.5 and Llama 3.1 405B on Rival?

This page shows a side-by-side comparison of GPT-4.5 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-4.5 and Llama 3.1 405B?

GPT-4.5 is developed by OpenAI while Llama 3.1 405B is developed by Meta AI. GPT-4.5 has a 128K token context window vs Llama 3.1 405B's 128K. You can compare their actual outputs across 5 challenges on Rival to see how they differ in practice.

Which is better, GPT-4.5 or Llama 3.1 405B?

It depends on your use case. GPT-4.5 and Llama 3.1 405B each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 5 challenges so you can judge which fits your needs best.

How much does GPT-4.5 cost compared to Llama 3.1 405B?

GPT-4.5 costs $75/M input tokens and Llama 3.1 405B costs $2.7/M input tokens. Llama 3.1 405B is $72.30/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-4.5 and Llama 3.1 405B on Rival?

This page shows a side-by-side comparison of GPT-4.5 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-4.5 vs Llama 3.1 405B: Which Is Better?

Updated Feb 2025

Our Verdict

GPT-4.5

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.

Llama 3.1 405B is 48x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

GPT-4.5

Input

$75.00

Output

$150.00

Llama 3.1 405B

Input

$2.70

28× cheaper

Output

$3.10

48× cheaper

Llama 3.1 405B is cheaper on both — 28× input, 48× output

Writing DNA

Style Comparison

Similarity

39%

GPT-4.5 uses 466.6x more bold

GPT-4.5

Llama 3.1 405B

63%Vocabulary56%

16wSentence Length15w

0.57Hedging0.41

4.7Bold0.0

6.4Lists1.9

0.00Emoji0.03

1.30Headings0.00

0.54Transitions0.16

Based on 11 + 5 text responses

Research

What we learned reading every model

GPT-4.5 and Llama 3.1 405B have opinions about your brand too.Ask 10 models what they tell people about you. Verbatim receipts.Run the mirror

FAQ

Common questions

Keep exploring

More comparisons

GPT-4.5 vs Llama 4 MaverickCross-provider

Llama 3.1 405B vs GPT-5Cross-provider

GPT-4.5 vs MiniMax M3New provider

Updated Feb 2025

Our Verdict

GPT-4.5

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.

Llama 3.1 405B is 48x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

GPT-4.5

Input

$75.00

Output

$150.00

Llama 3.1 405B

Input

$2.70

28× cheaper

Output

$3.10

48× cheaper

Llama 3.1 405B is cheaper on both — 28× input, 48× output

Writing DNA

Style Comparison

Similarity

39%

GPT-4.5 uses 466.6x more bold

GPT-4.5

Llama 3.1 405B

63%Vocabulary56%

16wSentence Length15w

0.57Hedging0.41

4.7Bold0.0

6.4Lists1.9

0.00Emoji0.03

1.30Headings0.00

0.54Transitions0.16

Based on 11 + 5 text responses

Research

What we learned reading every model

GPT-4.5 and Llama 3.1 405B have opinions about your brand too.Ask 10 models what they tell people about you. Verbatim receipts.Run the mirror

FAQ

Common questions

Keep exploring

More comparisons

GPT-4.5 vs Llama 4 MaverickCross-provider

Llama 3.1 405B vs GPT-5Cross-provider

GPT-4.5 vs MiniMax M3New provider