What is the difference between Claude Sonnet 4.6 and OpenAI Codex Mini?

Claude Sonnet 4.6 is developed by Anthropic while OpenAI Codex Mini is developed by OpenAI. Claude Sonnet 4.6 has a 1.0M token context window vs OpenAI Codex Mini's 200K. You can compare their actual outputs across 10 challenges on Rival to see how they differ in practice.

Which is better, Claude Sonnet 4.6 or OpenAI Codex Mini?

It depends on your use case. Claude Sonnet 4.6 and OpenAI Codex Mini each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 10 challenges so you can judge which fits your needs best.

How much does Claude Sonnet 4.6 cost compared to OpenAI Codex Mini?

Claude Sonnet 4.6 costs $3/M input tokens and OpenAI Codex Mini costs $1.5/M input tokens. OpenAI Codex Mini is $1.50/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 Claude Sonnet 4.6 and OpenAI Codex Mini on Rival?

This page shows a side-by-side comparison of Claude Sonnet 4.6 and OpenAI Codex 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 Claude Sonnet 4.6 and OpenAI Codex Mini?

Claude Sonnet 4.6 is developed by Anthropic while OpenAI Codex Mini is developed by OpenAI. Claude Sonnet 4.6 has a 1.0M token context window vs OpenAI Codex Mini's 200K. You can compare their actual outputs across 10 challenges on Rival to see how they differ in practice.

Which is better, Claude Sonnet 4.6 or OpenAI Codex Mini?

It depends on your use case. Claude Sonnet 4.6 and OpenAI Codex Mini each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 10 challenges so you can judge which fits your needs best.

How much does Claude Sonnet 4.6 cost compared to OpenAI Codex Mini?

Claude Sonnet 4.6 costs $3/M input tokens and OpenAI Codex Mini costs $1.5/M input tokens. OpenAI Codex Mini is $1.50/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 Claude Sonnet 4.6 and OpenAI Codex Mini on Rival?

This page shows a side-by-side comparison of Claude Sonnet 4.6 and OpenAI Codex 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.

Updated Feb 2026

Claude Sonnet 4.6vsOpenAI Codex Mini

OpenAI Codex Mini is cheaper than Claude Sonnet 4.6 at $1.5/M vs $3/M input tokens.

Claude Sonnet 4.6 and OpenAI Codex Mini compared across 10 shared prompts
Spec	Claude Sonnet 4.6	OpenAI Codex Mini
Input price	$3/M tokens	$1.5/M tokens
Output price	$15/M tokens	$6/M tokens
Context window	1.0M tokens	200K tokens
Released	Feb 2026	May 2025
SWE-bench Verified	79.0%	71.3%

Our Verdict

Claude Sonnet 4.6

OpenAI Codex MiniRunner-up

Not enough votes to call it. On the specs, Claude Sonnet 4.6 has the edge: bigger model tier, newer, bigger context window.

Slight edge

API pricing

Cost per 1M tokens

Claude Sonnet 4.6

Input

$3.00

Output

$15.00

OpenAI Codex Mini

Input

$1.50

2.0× cheaper

Output

$6.00

2.5× cheaper

OpenAI Codex Mini is cheaper on both — 2.0× input, 2.5× output

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

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Updated Feb 2026

Claude Sonnet 4.6vsOpenAI Codex Mini

OpenAI Codex Mini is cheaper than Claude Sonnet 4.6 at $1.5/M vs $3/M input tokens.

Claude Sonnet 4.6 and OpenAI Codex Mini compared across 10 shared prompts
Spec	Claude Sonnet 4.6	OpenAI Codex Mini
Input price	$3/M tokens	$1.5/M tokens
Output price	$15/M tokens	$6/M tokens
Context window	1.0M tokens	200K tokens
Released	Feb 2026	May 2025
SWE-bench Verified	79.0%	71.3%