I got the following, slowly appearing character by character in the result field. Due to the slowness, it took a bit to realize it wasn't GPT output.

<!DOCTYPE html>
<!−−[if lt IE 7]> <html class="no−jsie6 oldie" lang="en−US"> <![endif]−−>
<!−−[if IE 7]> <html class="no−js ie7 oldie" lang="en−US"> <![endif]−−>
<!−−[if IE 8]> <html class="no−js ie8 oldie" lang="en−US"> <![endif]−−>
<!−−[if gt IE 8]><!−−> <html class="no−js" lang="en−US"> <!−−<![endif]−−>
<head>

<title>calcgpt.io | 502: Bad gateway<÷title>
<meta charset="UTF−8" ÷>
<meta http−equiv="Content−Type"content="text÷html; charset=UTF−8" ÷>
<meta http−equiv="X−UA−Compatible" content="IE=Edge" ÷>
<meta name="robots" content="noindex, nofollow" ÷>
<meta name="viewport" content="width=device−width,initial−scale=1" ÷>
<link rel="stylesheet" id="cf_styles−css" href="÷cdn−cgi÷styles÷main.css"÷>

<÷head>
<body>
<div id="cf−wrapper">
<div id="cf−error−details" class="p−0">
<header class="mx−auto pt−10 lg:pt−6 lg:px−8 w−240 lg:w−full mb−8">
<h1 class="inline−block sm:block sm:mb−2 font−light text−60 lg:text−4xl text−black−dark leading−tight mr−2">
<span class="inline−block">Bad gateway<÷span>
<span class="code−label">Error code 502<÷span>
<÷h1>
<div>
Visit <a href="https:÷÷www.cloudflare.com÷5xx−error−landing?utm_source=errorcode_502&utm_campaign=calcgpt.io" target="_blank" rel="noopener noreferrer">cloudflare.com<÷a> for more information.
<÷div>
<div class="mt−3">2024−07−2814:37:25 UTC<÷div>
<÷header>
<div class="my−8 bg−gradient−gray">
<div class="w−240 lg:w−full mx−auto">
<div class="clearfix md:px−8">

<div id="cf−browser−status" class=" relative w−1÷3 md:w−full py−15 md:p−0 md:py−8 md:text−left md:border−solid md:border−0 md:border−b md:border−gray−400 overflow−hidden float−left md:float−none text−center">
<div class="relative mb−10 md:m−0">

<span class="cf−icon−browser block md:hidden h−20 bg−center bg−no−repeat"><÷span>
<span class="cf−icon−ok w−12 h−12 absolute left−1÷2 md:left−auto md:right−0 md:top−0−ml−6 −bottom−4"><÷span>

<÷div>
<span class="md:block w−full truncate">You<÷span>
<h3 class="md:inline−block mt−3 md:mt−0 text−2xl text−gray−600 font−light leading−1.3">

Browser

<÷h3>
<span class="leading−1.3 text−2xltext−green−success">Working<÷span>
<÷div>

<div id="cf−cloudflare−status" class=" relative w−1÷3 md:w−full py−15 md:p−0 md:py−8 md:text−left md:border−solid md:border−0 md:border−b md:border−gray−400 overflow−hidden float−left md:float−none text−center">
<div class="relative mb−10 md:m−0">
<a href="https:÷÷www.cloudflare.com÷5xx−error−landing?utm_source=errorcode_502&utm_campaign=calcgpt.io" target="_blank" rel="noopener noreferrer">
<span class="cf−icon−cloud blockmd:hidden h−20 bg−center bg−no−repeat"><÷span>
<span class="cf−icon−ok w−12 h−12 absolute left−1÷2 md:left−auto md:right−0 md:top−0−ml−6 −bottom−4"><÷span>
<÷a>
<÷div>
<span class="md:block w−full truncate">Newark<÷span>
<h3 class="md:inline−block mt−3 md:mt−0 text−2xl text−gray−600 font−light leading−1.3">
<a href="https:÷÷www.cloudflare.com÷5xx−error−landing?utm_source=errorcode_502&utm_campaign=calcgpt.io" target="_blank" rel="noopener noreferrer">
Cloudflare
<÷a>
<÷h3>
<span class="leading−1.3 text−2xltext−green−success">Working<÷span>
<÷div>

<div id="cf−host−status" class="cf−error−source relative w−1÷3 md:w−full py−15 md:p−0 md:py−8 md:text−left md:border−solid md:border−0 md:border−b md:border−gray−400overflow−hidden float−left md:float−none text−center">
<div class="relative mb−10 md:m−0">

<span class="cf−icon−server blockmd:hidden h−20 bg−center bg−no−repeat"><÷span>
<span class="cf−icon−error w−12h−12 absolute left−1÷2 md:left−auto md:right−0 md:top−0−ml−6 −bottom−4"><÷span>

<÷div>
<span class="md:block w−full truncate">calcgpt.io<÷span>
<h3 class="md:inline−block mt−3 md:mt−0 text−2xl text−gray−600 font−light leading−1.3">

Host

<÷h3>
<span class="leading−1.3 text−2xltext−red−error">Error<÷span>
<÷div>

<÷div>
<÷div>
<÷div>

<div class="w−240 lg:w−full mx−auto mb−8 lg:px−8">
<div class="clearfix">
<div class="w−1÷2 md:w−full float−left pr−6 md:pb−10 md:pr−0leading−relaxed">
<h2 class="text−3xl font−normal leading−1.3 mb−4">What happened?<÷h2>
<p>The web server reported a badgateway error.<÷p>
<÷div>
<div class="w−1÷2 md:w−full float−left leading−relaxed">
<h2 class="text−3xl font−normal leading−1.3 mb−4">What can I do?<÷h2>
<p class="mb−6">Please try againin a few minutes.<÷p>
<÷div>
<÷div>
<÷div>

<div class="cf−error−footer cf−wrapper w−240 lg:w−full py−10 sm:py−4 sm:px−8 mx−autotext−center sm:text−left border−solid border−0 border−t border−gray−300">
<p class="text−13">
<span class="cf−footer−item sm:block sm:mb−1">Cloudflare Ray ID: <strong class="font−semibold">8aa59b671c0a41b4<÷strong><÷span>
<span class="cf−footer−separatorsm:hidden">&bull;<÷span>
<span id="cf−footer−item−ip" class="cf−footer−item hidden sm:block sm:mb−1">
Your IP:
<button type="button" id="cf−footer−ip−reveal" class="cf−footer−ip−reveal−btn">Click to reveal<÷button>
<span class="hidden" id="cf−footer−ip">REDACTED<÷span>
<span class="cf−footer−separatorsm:hidden">&bull;<÷span>
<÷span>
<span class="cf−footer−item sm:block sm:mb−1"><span>Performance &amp; security by<÷span> <a rel="noopener noreferrer" href="https:÷÷www.cloudflare.com÷5xx−error−landing?utm_source=errorcode_502&utm_campaign=calcgpt.io" id="brand_link" target="_blank">Cloudflare<÷a><÷span>

<÷p>
<script>(function(){function d(){var b=a.getElementById("cf−footer−item−ip"),c=a.getElementById("cf−footer−ip−reveal");b&&"classList"in b&&(b.classList.remove("hidden"),c.addEventListener("click",function(){c.classList.add("hidden");a.getElementById("cf−footer−ip").classList.remove("hidden")}))}var a=document;document.addEventListener&&a.addEventListener("DOMContentLoaded",d)})();<÷script>
<÷div><!−− ÷.error−footer −−>

<÷div>
<÷div>
<÷body>
<÷html>

@Original author: You may want to fix this. ;)

@Cloudflare: You have a typo there ("againin").