What is the difference between OpenAI Codex Mini and Mistral Devstral Medium?

OpenAI Codex Mini is developed by OpenAI while Mistral Devstral Medium is developed by Mistral AI. You can compare their actual outputs across 10 challenges on Rival to see how they differ in practice.

Which is better, OpenAI Codex Mini or Mistral Devstral Medium?

It depends on your use case. OpenAI Codex Mini and Mistral Devstral Medium 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 OpenAI Codex Mini cost compared to Mistral Devstral Medium?

OpenAI Codex Mini costs $1.5/M input tokens and Mistral Devstral Medium costs $0.4/M input tokens. Mistral Devstral Medium is $1.10/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 OpenAI Codex Mini and Mistral Devstral Medium on Rival?

This page shows a side-by-side comparison of OpenAI Codex Mini and Mistral Devstral Medium 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 OpenAI Codex Mini and Mistral Devstral Medium?

OpenAI Codex Mini is developed by OpenAI while Mistral Devstral Medium is developed by Mistral AI. You can compare their actual outputs across 10 challenges on Rival to see how they differ in practice.

Which is better, OpenAI Codex Mini or Mistral Devstral Medium?

It depends on your use case. OpenAI Codex Mini and Mistral Devstral Medium 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 OpenAI Codex Mini cost compared to Mistral Devstral Medium?

OpenAI Codex Mini costs $1.5/M input tokens and Mistral Devstral Medium costs $0.4/M input tokens. Mistral Devstral Medium is $1.10/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 OpenAI Codex Mini and Mistral Devstral Medium on Rival?

This page shows a side-by-side comparison of OpenAI Codex Mini and Mistral Devstral Medium 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 Jul 2025

OpenAI Codex MinivsMistral Devstral Medium

Mistral Devstral Medium is cheaper than OpenAI Codex Mini at $0.4/M vs $1.5/M input tokens.

OpenAI Codex Mini and Mistral Devstral Medium compared across 10 shared prompts
Spec	OpenAI Codex Mini	Mistral Devstral Medium
Input price	$1.5/M tokens	$0.4/M tokens
Output price	$6/M tokens	$2/M tokens
Context window	200K tokens	—
Released	May 2025	Jul 2025
SWE-bench Verified	71.3%	61.6%

Our Verdict

OpenAI Codex Mini

Mistral Devstral Medium

Not enough votes to call it. On the specs, nothing separates them.

Mistral Devstral Medium costs 3.0x less per token.

Too close to call

API pricing

Cost per 1M tokens

OpenAI Codex Mini

Input

$1.50

Output

$6.00

Mistral Devstral Medium

Input

$0.40

3.8× cheaper

Output

$2.00

3.0× cheaper

Mistral Devstral Medium is cheaper on both — 3.8× input, 3.0× output

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

OpenAI Codex Mini vs Ox AlphaNew provider

OpenAI Codex Mini vs MercuryNew provider

OpenAI Codex Mini vs MiniMax M2.7New provider

OpenAI Codex Mini vs MiniMax M3New provider

OpenAI Codex Mini vs Qwen3.5 Plus 2026-02-15New provider

OpenAI Codex Mini vs Qwen3.5 Plus 2026-04-20New provider

OpenAI Codex Mini vs Qwen3.6 27BNew provider

OpenAI Codex Mini vs Qwen3.6 35B A3BNew provider

Updated Jul 2025

OpenAI Codex MinivsMistral Devstral Medium

Mistral Devstral Medium is cheaper than OpenAI Codex Mini at $0.4/M vs $1.5/M input tokens.

OpenAI Codex Mini and Mistral Devstral Medium compared across 10 shared prompts
Spec	OpenAI Codex Mini	Mistral Devstral Medium
Input price	$1.5/M tokens	$0.4/M tokens
Output price	$6/M tokens	$2/M tokens
Context window	200K tokens	—
Released	May 2025	Jul 2025
SWE-bench Verified	71.3%	61.6%