What is the difference between GPT-5.1-Codex-Mini and Grok 4.20 Multi-Agent Beta?

GPT-5.1-Codex-Mini is developed by OpenAI while Grok 4.20 Multi-Agent Beta is developed by xAI. GPT-5.1-Codex-Mini has a 400K token context window vs Grok 4.20 Multi-Agent Beta's 2.0M. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, GPT-5.1-Codex-Mini or Grok 4.20 Multi-Agent Beta?

It depends on your use case. GPT-5.1-Codex-Mini and Grok 4.20 Multi-Agent Beta each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 53 challenges so you can judge which fits your needs best.

How much does GPT-5.1-Codex-Mini cost compared to Grok 4.20 Multi-Agent Beta?

GPT-5.1-Codex-Mini costs $1.5/M input tokens and Grok 4.20 Multi-Agent Beta costs $2/M input tokens. GPT-5.1-Codex-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-Codex-Mini and Grok 4.20 Multi-Agent Beta on Rival?

This page shows a side-by-side comparison of GPT-5.1-Codex-Mini and Grok 4.20 Multi-Agent Beta 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-Codex-Mini and Grok 4.20 Multi-Agent Beta?

GPT-5.1-Codex-Mini is developed by OpenAI while Grok 4.20 Multi-Agent Beta is developed by xAI. GPT-5.1-Codex-Mini has a 400K token context window vs Grok 4.20 Multi-Agent Beta's 2.0M. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, GPT-5.1-Codex-Mini or Grok 4.20 Multi-Agent Beta?

It depends on your use case. GPT-5.1-Codex-Mini and Grok 4.20 Multi-Agent Beta each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 53 challenges so you can judge which fits your needs best.

How much does GPT-5.1-Codex-Mini cost compared to Grok 4.20 Multi-Agent Beta?

GPT-5.1-Codex-Mini costs $1.5/M input tokens and Grok 4.20 Multi-Agent Beta costs $2/M input tokens. GPT-5.1-Codex-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-Codex-Mini and Grok 4.20 Multi-Agent Beta on Rival?

This page shows a side-by-side comparison of GPT-5.1-Codex-Mini and Grok 4.20 Multi-Agent Beta 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-Codex-Mini vs Grok 4.20 Multi-Agent Beta: Which Is Better?

Updated Mar 2026

Our Verdict

Grok 4.20 Multi-Agent Beta

GPT-5.1-Codex-MiniRunner-up

No community votes yet. On paper, Grok 4.20 Multi-Agent Beta has the edge — newer, bigger context window.

Too close to call

API pricing

Cost per 1M tokens

GPT-5.1-Codex-Mini

Input

$1.50

1.3× cheaper

Output

$6.00

Grok 4.20 Multi-Agent Beta

Input

$2.00

Output

$6.00

Writing DNA

Style Comparison

Similarity

79%

Grok 4.20 Multi-Agent Beta uses 3.4x more headings

GPT-5.1-Codex-Mini

Grok 4.20 Multi-Agent Beta

65%Vocabulary59%

20wSentence Length16w

0.56Hedging0.41

3.3Bold2.7

3.4Lists2.4

0.00Emoji0.00

0.08Headings0.26

0.05Transitions0.02

Based on 13 + 23 text responses

Research

What we learned reading every model

GPT-5.1-Codex-Mini and Grok 4.20 Multi-Agent Beta 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-Codex-Mini vs MiniMax M3New provider

GPT-5.1-Codex-Mini vs Claude Opus 4.1New provider

GPT-5.1-Codex-Mini vs Llama 4 MaverickNew provider

Updated Mar 2026

Our Verdict

Grok 4.20 Multi-Agent Beta

GPT-5.1-Codex-MiniRunner-up

No community votes yet. On paper, Grok 4.20 Multi-Agent Beta has the edge — newer, bigger context window.

Too close to call

API pricing

Cost per 1M tokens

GPT-5.1-Codex-Mini

Input

$1.50

1.3× cheaper

Output

$6.00

Grok 4.20 Multi-Agent Beta

Input

$2.00

Output

$6.00

Writing DNA

Style Comparison

Similarity

79%

Grok 4.20 Multi-Agent Beta uses 3.4x more headings

GPT-5.1-Codex-Mini

Grok 4.20 Multi-Agent Beta

65%Vocabulary59%

20wSentence Length16w

0.56Hedging0.41

3.3Bold2.7

3.4Lists2.4

0.00Emoji0.00

0.08Headings0.26

0.05Transitions0.02

Based on 13 + 23 text responses

Research

What we learned reading every model

GPT-5.1-Codex-Mini and Grok 4.20 Multi-Agent Beta 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-Codex-Mini vs MiniMax M3New provider

GPT-5.1-Codex-Mini vs Claude Opus 4.1New provider

GPT-5.1-Codex-Mini vs Llama 4 MaverickNew provider