Claude 3.7 Thinking Sonnet vs 
OpenAI Codex Mini
OpenAI Codex Mini is cheaper than Claude 3.7 Thinking Sonnet at $1.5/M vs $6/M input tokens.
Pokémon Battle UI Recreation
Pokémon battle screen you can actually click. One HTML file.
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Which answer wins?
Written rounds
2 promptsFive jokes on demand, then count how many were actually different.
Claude 3.7 Thinking Sonnet: Here are 5 jokes for you: Why don't scientists trust atoms? Because they make up everything! I told my wife she was drawing her eyebrows too high. She looked surprised. How does a penguin build its house? Igloos it together! What do you call a fake noodle? An impasta! Why did the scarecrow win an award?
OpenAI Codex Mini: Sure—here are five jokes: I asked the librarian if books about paranoia were available. She whispered, "They're right behind you." Why did the tomato turn red? Because it saw the salad dressing. I bought a boat because it was for sail. Don't trust stairs—they're always up to something.
Three minutes of stand-up. Puns are banned.
Claude 3.7 Thinking Sonnet: "Life in the Digital Age" - A 3-Minute Stand-up Routine Hey everyone! Great to be here tonight. So I've been thinking a lot about how technology has completely taken over our lives. You know what's crazy? We now have smart everything. Smart fridges, smart toilets... I got a smart mattress last month.
OpenAI Codex Mini: [Comedian walks onstage] Hey, everyone! Great to see you all tonight. I'm Jamie—if you thought that intro was enthusiastic, you should've seen me when I realized this place has Wi-Fi. Seriously, though, I love stand-up.
Price and specs
| Spec | Claude 3.7 Thinking Sonnet | OpenAI Codex Mini |
|---|---|---|
| Input price | $6/M tokens | $1.5/M tokens |
| Output price | $30/M tokens | $6/M tokens |
| Context window | 200K tokens | 200K tokens |
| Parameters | Not disclosed | Not disclosed |
| Free API (OpenRouter) | No | No |
| Released | Feb 2025 | May 2025 |
| At 10M a month | $60.00 | $15.00 |
Input tokens at list price. No caching, no batch discount.
Common questions
What is the difference between Claude 3.7 Thinking Sonnet and OpenAI Codex Mini?
Claude 3.7 Thinking Sonnet is developed by Anthropic while OpenAI Codex Mini is developed by OpenAI. Claude 3.7 Thinking Sonnet has a 200K 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 3.7 Thinking Sonnet or OpenAI Codex Mini?
It depends on your use case. Claude 3.7 Thinking Sonnet 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 3.7 Thinking Sonnet cost compared to OpenAI Codex Mini?
Claude 3.7 Thinking Sonnet costs $6/M input tokens and OpenAI Codex Mini costs $1.5/M input tokens. OpenAI Codex Mini is $4.50/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 3.7 Thinking Sonnet and OpenAI Codex Mini on Rival?
This page shows a side-by-side comparison of Claude 3.7 Thinking Sonnet 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.
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