What is the difference between GPT-4.5 and OpenAI o4 Mini High?

Both are developed by OpenAI but target different use cases. GPT-4.5 has a 128K token context window vs OpenAI o4 Mini High's 200K. These results are based on blind head-to-head voting across 25 challenges.

Which is better, GPT-4.5 or OpenAI o4 Mini High?

Based on 3 community votes on Rival, GPT-4.5 and OpenAI o4 Mini High are closely matched with similar win rates. The better choice depends on your specific use case. Compare their real outputs side-by-side across 25 challenges to decide.

How much does GPT-4.5 cost compared to OpenAI o4 Mini High?

GPT-4.5 costs $75/M input tokens and OpenAI o4 Mini High costs $1.1/M input tokens. OpenAI o4 Mini High is $73.90/M cheaper per input. The more expensive model wins 50% of duels, so the premium may be justified by quality.

How are GPT-4.5 vs OpenAI o4 Mini High votes collected on Rival?

Rival presents both models' outputs side-by-side in blind duels. Voters see the responses but don't know which model produced each one, eliminating brand bias. 3 votes have been collected for this pair across 25 challenges. All vote data is part of Rival's open dataset.

What is the difference between GPT-4.5 and OpenAI o4 Mini High?

Both are developed by OpenAI but target different use cases. GPT-4.5 has a 128K token context window vs OpenAI o4 Mini High's 200K. These results are based on blind head-to-head voting across 25 challenges.

Which is better, GPT-4.5 or OpenAI o4 Mini High?

Based on 3 community votes on Rival, GPT-4.5 and OpenAI o4 Mini High are closely matched with similar win rates. The better choice depends on your specific use case. Compare their real outputs side-by-side across 25 challenges to decide.

How much does GPT-4.5 cost compared to OpenAI o4 Mini High?

GPT-4.5 costs $75/M input tokens and OpenAI o4 Mini High costs $1.1/M input tokens. OpenAI o4 Mini High is $73.90/M cheaper per input. The more expensive model wins 50% of duels, so the premium may be justified by quality.

How are GPT-4.5 vs OpenAI o4 Mini High votes collected on Rival?

Rival presents both models' outputs side-by-side in blind duels. Voters see the responses but don't know which model produced each one, eliminating brand bias. 3 votes have been collected for this pair across 25 challenges. All vote data is part of Rival's open dataset.

GPT-4.5 vs OpenAI o4 Mini High: Which Is Better?

Updated Apr 2025

Our Verdict

GPT-4.5

OpenAI o4 Mini High

Genuinely even. Both are strong choices.

OpenAI o4 Mini High is 34x 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

OpenAI o4 Mini High

Input

$1.10

68× cheaper

Output

$4.40

34× cheaper

OpenAI o4 Mini High is cheaper on both — 68× input, 34× output

Writing DNA

Style Comparison

Similarity

47%

GPT-4.5 uses 466.6x more bold

GPT-4.5

OpenAI o4 Mini High

63%Vocabulary70%

16wSentence Length18w

0.57Hedging0.33

4.7Bold0.0

6.4Lists1.3

0.00Emoji0.02

1.30Headings0.00

0.54Transitions0.04

Based on 11 + 14 text responses

Research

What we learned reading every model

GPT-4.5 and OpenAI o4 Mini High 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 MaverickNew provider

OpenAI o4 Mini High vs GPT-5Same lab

GPT-4.5 vs MiniMax M3New provider

Updated Apr 2025

Our Verdict

GPT-4.5

OpenAI o4 Mini High

Genuinely even. Both are strong choices.

OpenAI o4 Mini High is 34x 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

OpenAI o4 Mini High

Input

$1.10

68× cheaper

Output

$4.40

34× cheaper

OpenAI o4 Mini High is cheaper on both — 68× input, 34× output

Writing DNA

Style Comparison

Similarity

47%

GPT-4.5 uses 466.6x more bold

GPT-4.5

OpenAI o4 Mini High

63%Vocabulary70%

16wSentence Length18w

0.57Hedging0.33

4.7Bold0.0

6.4Lists1.3

0.00Emoji0.02

1.30Headings0.00

0.54Transitions0.04

Based on 11 + 14 text responses

Research

What we learned reading every model

GPT-4.5 and OpenAI o4 Mini High 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 MaverickNew provider

OpenAI o4 Mini High vs GPT-5Same lab

GPT-4.5 vs MiniMax M3New provider