OpenAI Codex Mini vs o3 Mini
Compare OpenAI Codex Mini and o3 Mini, both from OpenAI, in 7 community votes, openai codex mini wins 80% of head-to-head duels, context windows of 200K vs 64K, tested across 10 shared challenges. Updated April 2026.
Which is better, OpenAI Codex Mini or o3 Mini?
OpenAI Codex Mini is the better choice overall, winning 80% of 7 blind community votes on Rival. OpenAI Codex Mini costs $1.5/M input tokens vs $1.1/M for o3 Mini. Context windows: 200K vs 64K tokens. Compare their real outputs side by side below.
Key Differences Between OpenAI Codex Mini and o3 Mini
OpenAI Codex Mini is made by openai while o3 Mini is from openai. OpenAI Codex Mini has a 200K token context window compared to o3 Mini's 64K. On pricing, OpenAI Codex Mini costs $1.5/M input tokens vs $1.1/M for o3 Mini. In community voting, In 7 community votes, OpenAI Codex Mini wins 80% of head-to-head duels.
In 7 community votes, OpenAI Codex Mini wins 80% of head-to-head duels. OpenAI Codex Mini leads in Image Generation. Based on blind community voting from the Rival open dataset of 7+ human preference judgments for this pair.
Pick OpenAI Codex Mini. In 7 blind votes, OpenAI Codex Mini wins 80% of the time. That's not luck.
OpenAI Codex Mini particularly excels in Image Generation.
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178
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12
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32
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279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
