What is the difference between Gemma 4 26B A4B and GPT-5.1-Codex?

Gemma 4 26B A4B is developed by Google AI while GPT-5.1-Codex is developed by OpenAI. Gemma 4 26B A4B has a 262K token context window vs GPT-5.1-Codex's 400K. You can compare their actual outputs across 52 challenges on Rival to see how they differ in practice.

Which is better, Gemma 4 26B A4B or GPT-5.1-Codex?

It depends on your use case. Gemma 4 26B A4B and GPT-5.1-Codex each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 52 challenges so you can judge which fits your needs best.

How much does Gemma 4 26B A4B cost compared to GPT-5.1-Codex?

Gemma 4 26B A4B costs $0.13/M input tokens and GPT-5.1-Codex costs $1.25/M input tokens. Gemma 4 26B A4B is $1.12/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 Gemma 4 26B A4B and GPT-5.1-Codex on Rival?

This page shows a side-by-side comparison of Gemma 4 26B A4B and GPT-5.1-Codex 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 Gemma 4 26B A4B and GPT-5.1-Codex?

Gemma 4 26B A4B is developed by Google AI while GPT-5.1-Codex is developed by OpenAI. Gemma 4 26B A4B has a 262K token context window vs GPT-5.1-Codex's 400K. You can compare their actual outputs across 52 challenges on Rival to see how they differ in practice.

Which is better, Gemma 4 26B A4B or GPT-5.1-Codex?

It depends on your use case. Gemma 4 26B A4B and GPT-5.1-Codex each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 52 challenges so you can judge which fits your needs best.

How much does Gemma 4 26B A4B cost compared to GPT-5.1-Codex?

Gemma 4 26B A4B costs $0.13/M input tokens and GPT-5.1-Codex costs $1.25/M input tokens. Gemma 4 26B A4B is $1.12/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 Gemma 4 26B A4B and GPT-5.1-Codex on Rival?

This page shows a side-by-side comparison of Gemma 4 26B A4B and GPT-5.1-Codex 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.

Gemma 4 26B A4B vs GPT-5.1-Codex: Which Is Better?

Updated Apr 2026

Our Verdict

GPT-5.1-Codex

Gemma 4 26B A4BRunner-up

No community votes yet. On paper, GPT-5.1-Codex has the edge — bigger model tier, bigger context window.

Gemma 4 26B A4B is 25x cheaper per token — worth considering if cost matters.

Too close to call

What do Gemma 4 26B A4B and GPT-5.1-Codex say about your brand?

10 models, one question, verbatim receipts.

or peek at a demo: Notion Linear Vercel

API pricing

Cost per 1M tokens

Gemma 4 26B A4B

Input

$0.13

9.6× cheaper

Output

$0.40

25× cheaper

GPT-5.1-Codex

Input

$1.25

Output

$10.00

Gemma 4 26B A4B is cheaper on both — 9.6× input, 25× output

Writing DNA

Style Comparison

Similarity

55%

GPT-5.1-Codex uses 2.5x more transitions

Gemma 4 26B A4B

GPT-5.1-Codex

58%Vocabulary70%

18wSentence Length17w

0.31Hedging0.39

6.8Bold3.4

3.3Lists3.5

0.00Emoji0.00

0.74Headings0.50

0.15Transitions0.38

Based on 27 + 14 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

GPT-5.1-Codex vs Ox AlphaNew provider

Gemma 4 26B A4B vs MiniMax M3New provider

Gemma 4 26B A4B vs Grok 3New provider

Updated Apr 2026

Our Verdict

GPT-5.1-Codex

Gemma 4 26B A4BRunner-up

No community votes yet. On paper, GPT-5.1-Codex has the edge — bigger model tier, bigger context window.

Gemma 4 26B A4B is 25x cheaper per token — worth considering if cost matters.

Too close to call

What do Gemma 4 26B A4B and GPT-5.1-Codex say about your brand?

10 models, one question, verbatim receipts.

or peek at a demo: Notion Linear Vercel

API pricing

Cost per 1M tokens

Gemma 4 26B A4B

Input

$0.13

9.6× cheaper

Output

$0.40

25× cheaper

GPT-5.1-Codex

Input

$1.25

Output

$10.00

Gemma 4 26B A4B is cheaper on both — 9.6× input, 25× output

Writing DNA

Style Comparison

Similarity

55%

GPT-5.1-Codex uses 2.5x more transitions

Gemma 4 26B A4B

GPT-5.1-Codex

58%Vocabulary70%

18wSentence Length17w

0.31Hedging0.39

6.8Bold3.4

3.3Lists3.5

0.00Emoji0.00

0.74Headings0.50

0.15Transitions0.38

Based on 27 + 14 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

GPT-5.1-Codex vs Ox AlphaNew provider

Gemma 4 26B A4B vs MiniMax M3New provider

Gemma 4 26B A4B vs Grok 3New provider