OpenAI Codex Mini vs Claude Sonnet 4

Compare OpenAI Codex Mini by OpenAI against Claude Sonnet 4 by Anthropic, in 21 community votes, claude sonnet 4 wins 67% of head-to-head duels, context windows of 200K vs 200K, tested across 10 shared challenges. Updated April 2026.

Which is better, OpenAI Codex Mini or Claude Sonnet 4?

Claude Sonnet 4 is the better choice overall, winning 67% of 21 blind community votes on Rival. OpenAI Codex Mini costs $1.5/M input tokens vs $3/M for Claude Sonnet 4. Context windows: 200K vs 200K tokens. Compare their real outputs side by side below.

Key Differences Between OpenAI Codex Mini and Claude Sonnet 4

OpenAI Codex Mini is made by openai while Claude Sonnet 4 is from anthropic. OpenAI Codex Mini has a 200K token context window compared to Claude Sonnet 4's 200K. On pricing, OpenAI Codex Mini costs $1.5/M input tokens vs $3/M for Claude Sonnet 4. In community voting, In 21 community votes, Claude Sonnet 4 wins 67% of head-to-head duels.

In 21 community votes, Claude Sonnet 4 wins 67% of head-to-head duels. Claude Sonnet 4 leads in Image Generation. Based on blind community voting from the Rival open dataset of 21+ human preference judgments for this pair.

Web Design: OpenAI Codex Mini and Claude Sonnet 4 are tied
Image Generation: Claude Sonnet 4 wins 88% of votes
Our Verdict
Claude Sonnet 4
Claude Sonnet 4Winner
OpenAI Codex Mini
OpenAI Codex MiniRunner-up

Pick Claude Sonnet 4. In 21 blind votes, Claude Sonnet 4 wins 67% of the time. That's not luck.

Claude Sonnet 4 particularly excels in Image Generation.

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OpenAI Codex MiniClaude Sonnet 4

279 AI models invented the same fake scientist.

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