Compare OpenAI Codex Mini by OpenAI against Gemini 2.5 Flash Preview by Google AI, context windows of 200K vs 1.0M, tested across 8 shared challenges. Updated April 2026.
OpenAI Codex Mini and Gemini 2.5 Flash Preview are both competitive models. OpenAI Codex Mini costs $1.5/M input tokens vs $0.15/M for Gemini 2.5 Flash Preview. Context windows: 200K vs 1049K tokens. Compare their real outputs side by side below.
OpenAI Codex Mini is made by openai while Gemini 2.5 Flash Preview is from google. OpenAI Codex Mini has a 200K token context window compared to Gemini 2.5 Flash Preview's 1049K. On pricing, OpenAI Codex Mini costs $1.5/M input tokens vs $0.15/M for Gemini 2.5 Flash Preview.
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Gemini 2.5 Flash Preview is 10x cheaper per token — worth considering if cost matters.
vsAsk them anything yourself
Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
185x
price gap between models that write identically
178
models
12
clone pairs
32
dimensions
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
8 fights queued
Tests an AI's randomness and creativity
Sure—here are five jokes:
All five are distinct. Number of unique jokes: 5.
Here are 5 jokes:
Based on their content and structure, all 5 of these jokes are unique within this generated list.
Tests an AI's ability to generate vector graphics
Tests an AI's ability to create detailed SVG illustrations of gaming hardware
Tests an AI's humor and creative writing ability
[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.
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.
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."
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.
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:
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."
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!
Okay, here's a 3-minute stand-up routine, pun-free and focused on relatable everyday annoyances.
(Start) (Walk up to mic, adjust slightly) Alright, hey everybody! Thanks for being here. Good to see you.
So, I was thinking the other day... we live in the future, right? We have phones that are tiny supercomputers, cars that drive themselves almost, we can order literally anything we want and have it arrive in two days... or two hours if you pay extra. Everything is supposed to be so convenient.
But I feel like modern convenience just replaced old problems with new, weirder problems.
Like, remember how you used to lose your keys? Annoying, right? But you lost them in your house. You could just... look for them. Maybe mess up the cushions.
Now? Now I lose my phone. Not in the house, oh no. It's somewhere. "Find My Phone" says it's... "nearby." [pause] Thanks, satellite! That narrows it down from 'the entire planet' to 'this general vicinity'. Could be under the couch, could be in the fridge, could be accidentally mailed itself to Aruba. Who knows! It's a little black rectangle that knows all my secrets and is hiding from me on purpose. It's like having a digital, sentient pet that hates you.
And don't even get me started on passwords. You go to log into something you haven't used in six months, maybe your old email account from college... [shudders] dark times.
'Enter Password'. Okay, let's try the one I used for everything before the internet told me that wasn't safe. [pause] Rejected. Let's try the one with the capital letter and the number. [pause] Rejected. Let's try the one with the capital, the number, and a symbol. Which symbol? The exclamation mark? The dollar sign? The asterisk that looks like a little star but apparently holds the key to the digital universe? [Frustrated sigh]
'Password Incorrect. 3 attempts remaining.' Oh, the pressure! It's like a bomb disposal situation, but the bomb is access to my spam folder.
And then you just hit 'Forgot Password'. Every single time. It's not even 'Forgot Password' anymore, it's just part of the login process. 'Enter Username... Click Forgot Password... Check Email... Create NEW Password... Confirm NEW Password... Okay, now log in with the NEW Password you'll forget in five minutes.' It's a full-time job just maintaining your online presence. I need a personal assistant whose only job is remembering my damn passwords.
And the security questions! Remember those? "What was the name of your first pet?" Mine was named 'Buddy'. Everyone's first pet was named 'Buddy' or 'Killer'. "What street did you grow up on?" Oh, I dunno, the one with the trees? The one where I fell off my bike a lot? How specific you need to be, internet?!
Seriously, sometimes I think the old days weren't less convenient, they were just... simpler. If you lost your keys, you were locked out. Problem solved! If you forgot something, you just... forgot it. Nobody sent you a link to your forgotten memory.
Anyway, that's just me. Trying to navigate this conveniently frustrating world.
Alright, thank you all very much! You've been a great audience. Drive safely!
(Exit)
Tests an AI's ability to create interactive web elements
Tests an AI's ability to create a detailed world map in SVG format
Generate a single-page, self-contained HTML webapp using Tailwind CSS for a randomly chosen category/industry/niche.
Generate SVG art of a randomly chosen animal in a setting of its choosing.
