What is the difference between OpenAI Codex Mini and DeepSeek R1 0528?

OpenAI Codex Mini is developed by OpenAI while DeepSeek R1 0528 is developed by DeepSeek. OpenAI Codex Mini has a 200K token context window vs DeepSeek R1 0528's 164K. 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 DeepSeek R1 0528?

It depends on your use case. OpenAI Codex Mini and DeepSeek R1 0528 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 DeepSeek R1 0528?

OpenAI Codex Mini costs $1.5/M input tokens and DeepSeek R1 0528 costs $0/M input tokens. DeepSeek R1 0528 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 OpenAI Codex Mini and DeepSeek R1 0528 on Rival?

This page shows a side-by-side comparison of OpenAI Codex Mini and DeepSeek R1 0528 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 May 2025

OpenAI Codex MinivsDeepSeek R1 0528

DeepSeek R1 0528 is cheaper than OpenAI Codex Mini at $0/M vs $1.5/M input tokens.

OpenAI Codex Mini and DeepSeek R1 0528 compared across 10 shared prompts
Spec	OpenAI Codex Mini	DeepSeek R1 0528
Input price	$1.5/M tokens	Free
Output price	$6/M tokens	Free
Context window	200K tokens	164K tokens
Parameters	Not disclosed	671B (37B active)
Weights	—	Open
Free API (OpenRouter)	No	No
Released	May 2025	May 2025
SWE-bench Verified	71.3%	57.6%