What is the difference between GPT-5.1 and GPT-5.4 Mini?

Both are developed by OpenAI but target different use cases. GPT-5.1 has a 400K token context window vs GPT-5.4 Mini's 400K. You can compare their actual outputs across 51 challenges on Rival to see how they differ in practice.

Which is better, GPT-5.1 or GPT-5.4 Mini?

It depends on your use case. GPT-5.1 and GPT-5.4 Mini each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 51 challenges so you can judge which fits your needs best.

How much does GPT-5.1 cost compared to GPT-5.4 Mini?

GPT-5.1 costs $1.25/M input tokens and GPT-5.4 Mini costs $0.75/M input tokens. GPT-5.4 Mini 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 GPT-5.1 and GPT-5.4 Mini on Rival?

This page shows a side-by-side comparison of GPT-5.1 and GPT-5.4 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-5.1 and GPT-5.4 Mini?

Both are developed by OpenAI but target different use cases. GPT-5.1 has a 400K token context window vs GPT-5.4 Mini's 400K. You can compare their actual outputs across 51 challenges on Rival to see how they differ in practice.

Which is better, GPT-5.1 or GPT-5.4 Mini?

It depends on your use case. GPT-5.1 and GPT-5.4 Mini each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 51 challenges so you can judge which fits your needs best.

How much does GPT-5.1 cost compared to GPT-5.4 Mini?

GPT-5.1 costs $1.25/M input tokens and GPT-5.4 Mini costs $0.75/M input tokens. GPT-5.4 Mini 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 GPT-5.1 and GPT-5.4 Mini on Rival?

This page shows a side-by-side comparison of GPT-5.1 and GPT-5.4 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-5.1 vs GPT-5.4 Mini: Which Is Better?

Updated Mar 2026

Our Verdict

GPT-5.1

GPT-5.4 Mini

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

API pricing

Cost per 1M tokens

GPT-5.1

Input

$1.25

Output

$10.00

GPT-5.4 Mini

Input

$0.75

1.7× cheaper

Output

$4.50

2.2× cheaper

GPT-5.4 Mini is cheaper on both — 1.7× input, 2.2× output

Writing DNA

Style Comparison

Similarity

62%

GPT-5.4 Mini uses 3.4x more headings

GPT-5.1

GPT-5.4 Mini

62%Vocabulary54%

19wSentence Length20w

0.29Hedging0.72

3.5Bold6.0

7.2Lists8.3

0.00Emoji0.00

0.61Headings2.11

0.03Transitions0.04

Based on 14 + 23 text responses

Research

What we learned reading every model

GPT-5.1 and GPT-5.4 Mini 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-5.1 vs MiniMax M3New provider

GPT-5.1 vs Grok 3New provider

GPT-5.1 vs Llama 4 MaverickNew provider

Updated Mar 2026

Our Verdict

GPT-5.1

GPT-5.4 Mini

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

API pricing

Cost per 1M tokens

GPT-5.1

Input

$1.25

Output

$10.00

GPT-5.4 Mini

Input

$0.75

1.7× cheaper

Output

$4.50

2.2× cheaper

GPT-5.4 Mini is cheaper on both — 1.7× input, 2.2× output

Writing DNA

Style Comparison

Similarity

62%

GPT-5.4 Mini uses 3.4x more headings

GPT-5.1

GPT-5.4 Mini

62%Vocabulary54%

19wSentence Length20w

0.29Hedging0.72

3.5Bold6.0

7.2Lists8.3

0.00Emoji0.00

0.61Headings2.11

0.03Transitions0.04

Based on 14 + 23 text responses

Research

What we learned reading every model

GPT-5.1 and GPT-5.4 Mini 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-5.1 vs MiniMax M3New provider

GPT-5.1 vs Grok 3New provider

GPT-5.1 vs Llama 4 MaverickNew provider