What is the difference between GPT-2 and GPT-5.1-Codex?

Both are developed by OpenAI but target different use cases. GPT-2 has a 1K token context window vs GPT-5.1-Codex's 400K. You can compare their actual outputs across 7 challenges on Rival to see how they differ in practice.

Which is better, GPT-2 or GPT-5.1-Codex?

It depends on your use case. GPT-2 and GPT-5.1-Codex each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 7 challenges so you can judge which fits your needs best.

How can I compare GPT-2 and GPT-5.1-Codex on Rival?

This page shows a side-by-side comparison of GPT-2 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 GPT-2 and GPT-5.1-Codex?

Both are developed by OpenAI but target different use cases. GPT-2 has a 1K token context window vs GPT-5.1-Codex's 400K. You can compare their actual outputs across 7 challenges on Rival to see how they differ in practice.

Which is better, GPT-2 or GPT-5.1-Codex?

It depends on your use case. GPT-2 and GPT-5.1-Codex each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 7 challenges so you can judge which fits your needs best.

How can I compare GPT-2 and GPT-5.1-Codex on Rival?

This page shows a side-by-side comparison of GPT-2 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.

GPT-2 vs GPT-5.1-Codex: Which Is Better?

Updated Nov 2025

Our Verdict

GPT-5.1-Codex

GPT-2Runner-up

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

Slight edge

API pricing

Cost per 1M tokens

GPT-2

Input

—

Output

—

GPT-5.1-Codex

Input

$1.25

Output

$10.00

Writing DNA

Style Comparison

Similarity

40%

GPT-5.1-Codex uses 39.1x more hedging

GPT-2

GPT-5.1-Codex

48%Vocabulary70%

36wSentence Length17w

0.00Hedging0.39

0.0Bold3.4

0.0Lists3.5

0.00Emoji0.00

0.00Headings0.50

0.00Transitions0.38

Based on 7 + 14 text responses

Research

What we learned reading every model

GPT-2 and GPT-5.1-Codex 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-2 vs MiniMax M3New provider

GPT-2 vs Grok 3New provider

GPT-2 vs Llama 4 MaverickNew provider

Updated Nov 2025

Our Verdict

GPT-5.1-Codex

GPT-2Runner-up

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

Slight edge

API pricing

Cost per 1M tokens

GPT-2

Input

—

Output

—

GPT-5.1-Codex

Input

$1.25

Output

$10.00

Writing DNA

Style Comparison

Similarity

40%

GPT-5.1-Codex uses 39.1x more hedging

GPT-2

GPT-5.1-Codex

48%Vocabulary70%

36wSentence Length17w

0.00Hedging0.39

0.0Bold3.4

0.0Lists3.5

0.00Emoji0.00

0.00Headings0.50

0.00Transitions0.38

Based on 7 + 14 text responses

Research

What we learned reading every model

GPT-2 and GPT-5.1-Codex 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-2 vs MiniMax M3New provider

GPT-2 vs Grok 3New provider

GPT-2 vs Llama 4 MaverickNew provider