OpenAI Codex Mini vs GPT-4.5
Compare OpenAI Codex Mini and GPT-4.5, both from OpenAI, context windows of 200K vs 128K, tested across 8 shared challenges. Updated February 2026.
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OpenAI Codex MinivsGPT-4.5
8 challenges
Why OpenAI Codex Mini?
28.6x cheaper overall$1.50/M in · $6.00/M out
1.6x more context200K
Leads 1 of 1 benchmarks
Stronger on SWE-bench Verified71.3% vs 28.0%
3 months newerMay 2025
Why GPT-4.5?
No standout advantages
8 / 8
SVG Layout Challengeimage generation
Tests an AI's ability to generate vector graphics
GPT-4.5
Vote
2 / 8
Xbox Controller SVG Artimage generation
Tests an AI's ability to create detailed SVG illustrations of gaming hardware
OpenAI Codex Mini
GPT-4.5
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Sponsored
3 / 8
Generate a Stand-Up Routineconversation
Tests an AI's humor and creative writing ability
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. For one thing, I get to share all the weird stuff I secretly do in my apartment… and instead of calling the cops, you guys just laugh. That's high-quality entertainment right there.
The Self-Checkout Olympics
So, the other day I'm in the self-checkout lane at the grocery store—because I'm the kind of person who's thrilled by the thought of scanning my own kale. Of course, there's always that one person holding up everyone behind them because they can't figure out how to scan a cucumber. Meanwhile, the machine flashes: "UNEXPECTED ITEM IN BAGGING AREA." It's staring at me like it's personally offended that I tried to buy almonds in instead of potato chips. I'm over here trying to reason with it:
"Look, buddy, I'm just trying to eat slightly healthier. Isn't that what we all want?"
Then it asks me, "Do you want a produce discount?" The only discount I want is one that lets me leave this line five minutes ago. I press "No," and the machine glares at me with a red light and calls for help like I'm smuggling avocados under my shirt.
Phone Addiction Confessions
My phone has ruined me. I can't have any thought longer than three seconds without Instagram interrupting me. I'll be in the shower—fresh shampoo, head full of suds—and in my brain:
"Did my neighbor's cat post another selfie? I need to check."
Fifteen minutes later I'm drying off, scrolling through cats wearing sweaters. Why are cats always more photogenic than me? They don't even try. They're just like, "You feed me, you click 'Like.'" I wish I could have a boundary like that—"Hey, you gave me pizza once; you can go ahead and like my vacation photos."
The Eternal Group Chat
Anyone here stuck in a group chat you can't escape? There's always that one friend who forwards the exact same video one hundred times, and everybody else thinks it's the highlight of their week. I just mute my phone like it's an ex sending memes at 2 a.m. Then I wake up at dawn, bleary-eyed, thinking, "What did I miss?" I open my phone—and it's Bob celebrating his new air-fryer chicken recipe for the fifth time. Meanwhile, I burned my eggs so badly this morning that my smoke alarm filed a restraining order against me.
Exercise—Or My Version of It
I decided to get in shape. I downloaded one of those workout apps promising "six-pack abs in six weeks." After day one, I collected six new excuses why I can't work out:
- "My dog doesn't like me exercising near him."
- "My couch needs emotional support right now."
- "I discovered the pyramid of Romesco sauce on my counter and needed to study it."
- "I stepped outside and almost got hit by a car—safety first."
…and so on.
Yesterday I finally ran so hard I passed out. When I came to, my neighbor was standing over me yelling, "You know you're not supposed to lean on lampposts, right?" I told him, "As soon as lampposts start offering aerodynamic support, I'll consider trusting them."
Closing Callback
Alright, folks, that's my time. If you ever feel judged by a machine or betrayed by a group chat, come find me—I'll be the one in the self-checkout line, trying to convince a barcode scanner that kale is, in fact, a food. Thanks so much—you've been awesome!
GPT-4.5
Alright, folks, how's everyone doing tonight? Good? Great! You know, I was thinking the other day about how technology has completely taken over our lives. Like, remember when we used to actually memorize phone numbers? Now, if my phone dies, I'm basically stranded. I know exactly two numbers: mine and 911. And honestly, I'm not even sure about mine.
And speaking of phones, have you noticed how aggressive autocorrect has gotten lately? It's like having a tiny, judgmental English teacher living in your pocket. The other day, I tried texting my friend, "Hey, wanna grab lunch?" Autocorrect changed it to, "Hey, wanna grab lungs?" Now my friend thinks I'm either a serial killer or really into organ trafficking. Either way, lunch plans canceled.
And dating apps—oh man, dating apps. They're basically just online shopping for humans, aren't they? Swipe left, swipe right, add to cart, proceed to checkout. But the worst part is the bios. Everyone's "adventurous," everyone "loves to travel," and everyone is "looking for a partner in crime." Really? Partner in crime? I'm just looking for someone who won't judge me for eating cereal at 2 AM in my underwear. Is that too much to ask?
And have you noticed how complicated coffee orders have gotten? I was behind someone at Starbucks the other day who ordered a "venti half-caf soy latte with two pumps of vanilla, one pump of caramel, extra foam, no whip, at exactly 140 degrees." I was like, "Are you ordering coffee or launching a rocket?" Meanwhile, I'm standing there like, "Uh, can I just get a coffee-flavored coffee? Medium? Hot?"
And finally, can we talk about passwords? Every website now wants a password that's at least 12 characters, with uppercase letters, lowercase letters, numbers, symbols, hieroglyphics, and your mother's maiden name. And then they have the nerve to ask, "Would you like us to remember this password?" Yes, please, because I certainly won't.
Alright, that's my time, folks. You've been great. Thanks for laughing—or at least pretending to!
Vote
4 / 8
Pokémon Battle UI Recreationweb design
Recreate an interactive, nostalgic Pokémon battle UI in a single HTML file.
OpenAI Codex Mini
GPT-4.5
Vote
5 / 8
Interactive Catan Boardweb design
Tests an AI's ability to create interactive web elements
OpenAI Codex Mini
GPT-4.5
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6 / 8
World Map SVGimage generation
Tests an AI's ability to create a detailed world map in SVG format
OpenAI Codex Mini
GPT-4.5
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7 / 8
Random Tailwind Webappweb design
Generate a single-page, self-contained HTML webapp using Tailwind CSS for a randomly chosen category/industry/niche.
OpenAI Codex Mini
No content available for this output.
GPT-4.5
No content available for this output.
Vote
8 / 8
Surprise Animal SVGimage generation
Generate SVG art of a randomly chosen animal in a setting of its choosing.
OpenAI Codex Mini
No content available for this output.
GPT-4.5
No content available for this output.
Vote
8 of 8