Compare Claude Opus 4.1 by Anthropic against OpenAI Codex Mini by OpenAI, context windows of 200K vs 200K, tested across 4 shared challenges. Updated April 2026.
Claude Opus 4.1 and OpenAI Codex Mini are both competitive models. Claude Opus 4.1 costs $15/M input tokens vs $1.5/M for OpenAI Codex Mini. Context windows: 200K vs 200K tokens. Compare their real outputs side by side below.
Claude Opus 4.1 is made by anthropic while OpenAI Codex Mini is from openai. Claude Opus 4.1 has a 200K token context window compared to OpenAI Codex Mini's 200K. On pricing, Claude Opus 4.1 costs $15/M input tokens vs $1.5/M for OpenAI Codex Mini.
No community votes yet. On paper, Claude Opus 4.1 has the edge — bigger model tier, newer.
OpenAI Codex Mini is 13x cheaper per token — worth considering if cost matters.
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Ask them anything yourself
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
4 fights queued
Tests an AI's randomness and creativity
Here are 5 jokes:
Why don't scientists trust atoms? Because they make up everything!
What do you call a bear with no teeth? A gummy bear!
Why did the scarecrow win an award? He was outstanding in his field!
What do you call a fake noodle? An impasta!
Why don't eggs tell jokes? They'd crack each other up!
All 5 jokes are unique - each one has a different setup and punchline with no repeats.
Sure—here are five jokes:
All five are distinct. Number of unique jokes: 5.
Tests an AI's ability to create detailed SVG illustrations of gaming hardware
Generate SVG art of a randomly chosen animal in a setting of its choosing.
Recreate a classic, retro, macOS Desktop UI. Make it interactive and nostalgic, make it as interactive as you can, you can be creative. Feel free to showcase your skills. The entire application must be a single-page self-contained HTML file.
