Model Price Calculator

Pick a model and enter expected tokens to estimate the monthly cost. Uses example prices that you replace with your own.

Download the file Open full screen

One HTML file with the CSS and JavaScript inside. No library needed. MIT license.

Live preview

How to use it

Click Copy the code, or download the file.
Paste the CSS into your stylesheet, the HTML where you want the component, and the script before the closing body tag.
Change --accent at the top of the CSS to your brand color, then connect the events to your AI service.

What you get

Works in light and dark mode automatically
Keyboard friendly, with labels for screen readers
Fits phones, tablets and desktops
Respects the reduced motion setting
No framework, so it works with any stack

The code

<!DOCTYPE html>
<!--
  Model Price Calculator: a free AI UI component
  From 100 Free AI UI Components by MM Rahman Bappi, MIT license
  https://mmrahmanbappi.github.io/100-free-ai-ui-components/

  How to use: copy the CSS, HTML and JavaScript below into your page.
  Colors are CSS variables at the top. Change --accent to match your brand.
  Light and dark themes follow the visitor's system setting, or set
  data-theme="dark" or data-theme="light" on the html element.
-->
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Model Price Calculator | Free AI UI Component</title>
<meta name="description" content="Pick a model and enter expected tokens to estimate the monthly cost. Uses example prices that you replace with your own.">
<meta name="robots" content="noindex, follow">
<style>
:root{
  --accent:#5b5bd6; --accent-ink:#fff; --accent-soft:#ececfc;
  --bg:#f7f7f8; --surface:#fff; --surface-2:#f1f1f4; --ink:#17171c; --text:#3a3a44; --muted:#6c6c78;
  --line:#e3e3e8; --good:#15803d; --warn:#b45309; --bad:#c62828;
  --radius:14px; --shadow:0 1px 2px rgba(20,20,30,.06),0 8px 24px -12px rgba(20,20,30,.18);
  --font:system-ui,-apple-system,"Segoe UI",Roboto,Ubuntu,sans-serif; --mono:ui-monospace,"Cascadia Code",Menlo,Consolas,monospace;
}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]){
  --accent:#8b8bff; --accent-ink:#0f0f16; --accent-soft:#25254a;
  --bg:#0f0f13; --surface:#18181f; --surface-2:#212129; --ink:#f3f3f6; --text:#d4d4dc; --muted:#9a9aa8;
  --line:#2c2c36; --good:#4ade80; --warn:#fbbf24; --bad:#f87171; --shadow:0 1px 2px rgba(0,0,0,.4),0 10px 30px -12px rgba(0,0,0,.6);
}}
:root[data-theme=dark]{
  --accent:#8b8bff; --accent-ink:#0f0f16; --accent-soft:#25254a;
  --bg:#0f0f13; --surface:#18181f; --surface-2:#212129; --ink:#f3f3f6; --text:#d4d4dc; --muted:#9a9aa8;
  --line:#2c2c36; --good:#4ade80; --warn:#fbbf24; --bad:#f87171; --shadow:0 1px 2px rgba(0,0,0,.4),0 10px 30px -12px rgba(0,0,0,.6);
}
*{box-sizing:border-box}
html,body{margin:0}
body{min-height:100vh;display:grid;grid-template-columns:minmax(0,1fr);place-items:center;padding:24px;background:var(--bg);color:var(--text);font:15px/1.5 var(--font);-webkit-font-smoothing:antialiased}
button,input,textarea,select{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
[hidden]{display:none!important}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition:none!important}}
/* ---- component ---- */
.wrap{width:min(100%,560px);display:flex;flex-direction:column;gap:14px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px 20px}
.card h2{font-size:15px;margin:0 0 4px;color:var(--ink)}
.muted{color:var(--muted);font-size:13px}
.num{font-variant-numeric:tabular-nums}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:10px;padding:8px 14px;font-size:14px;font-weight:600;cursor:pointer;text-decoration:none}
.btn:hover{border-color:var(--accent)}.btn.pri{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.bar{height:8px;border-radius:99px;background:var(--surface-2);overflow:hidden}
.bar i{display:block;height:100%;border-radius:99px;background:var(--accent);transition:width .3s,background .3s}
.ok{--lvl:var(--accent)}.warn{--lvl:var(--warn)}.full{--lvl:var(--bad)}
.tg{width:38px;height:22px;border-radius:99px;background:var(--line);position:relative;flex:none;border:0;cursor:pointer;padding:0}
.tg::after{content:"";position:absolute;top:3px;left:3px;width:16px;height:16px;border-radius:50%;background:#fff;transition:left .15s}
.tg[aria-checked=true]{background:var(--accent)}.tg[aria-checked=true]::after{left:19px}
.wrap{width:min(100%,600px)}
.models{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:12px 0 16px;border:0;padding:0}
.models label{border:1.5px solid var(--line);border-radius:12px;padding:10px 12px;cursor:pointer;font-size:13px;display:flex;flex-direction:column;gap:2px}
.models label b{color:var(--ink);font-size:14px}
.models label:has(input:checked){border-color:var(--accent);background:var(--accent-soft)}
.models input{position:absolute;opacity:0;width:1px;height:1px}
.models label:has(input:focus-visible){outline:2px solid var(--accent);outline-offset:2px}
.fields{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.fields label{display:flex;flex-direction:column;gap:4px;font-size:13px;font-weight:600;color:var(--ink)}
.fields input{border:1px solid var(--line);border-radius:10px;padding:8px 10px;background:var(--surface);color:var(--ink);font-variant-numeric:tabular-nums}
.res{margin-top:16px;padding:14px;border-radius:12px;background:var(--surface-2);display:flex;justify-content:space-between;align-items:baseline;gap:10px;flex-wrap:wrap}
.res b{font-size:28px;color:var(--ink)}
@media(max-width:500px){.models,.fields{grid-template-columns:1fr}}
</style>
</head>
<body>
<div class="wrap"><div class="card">
  <h2>Estimate your monthly cost</h2><p class="muted" style="margin:0">Example prices per million tokens.</p>
  <fieldset class="models" id="models"><legend class="sr">Model</legend>
    <label><input type="radio" name="m" value="fast"><b>Fast</b><span>$0.25 in, $1.25 out</span></label>
    <label><input type="radio" name="m" value="balanced" checked><b>Balanced</b><span>$3 in, $15 out</span></label>
    <label><input type="radio" name="m" value="deep"><b>Deep</b><span>$15 in, $75 out</span></label></fieldset>
  <div class="fields"><label>Input tokens per month<input id="in" type="number" min="0" step="100000" value="20000000"></label>
    <label>Output tokens per month<input id="out" type="number" min="0" step="100000" value="4000000"></label></div>
  <div class="res" aria-live="polite"><span class="muted">Estimated cost per month</span><b class="num" id="res">$0</b></div>
</div></div>
<script>
// Demo helper: add ?theme=dark or ?theme=light to the address to preview a theme.
(function(){var t=new URLSearchParams(location.search).get('theme');if(t)document.documentElement.dataset.theme=t;})();
var P={fast:[0.25,1.25],balanced:[3,15],deep:[15,75]},inp=document.getElementById('in'),out=document.getElementById('out'),res=document.getElementById('res');
function calc(){var m=document.querySelector('input[name=m]:checked').value,i=Math.max(0,+inp.value||0),o=Math.max(0,+out.value||0);
  var cost=i/1e6*P[m][0]+o/1e6*P[m][1];res.textContent='$'+cost.toLocaleString(undefined,{minimumFractionDigits:2,maximumFractionDigits:2});}
document.querySelectorAll('input').forEach(function(x){x.addEventListener('input',calc);x.addEventListener('change',calc);});calc();
</script>
</body>
</html>

More tokens and usage components

Token Ring Meter
A small ring that fills as a chat uses up its token budget. It turns orange near the limit and red when full, with an exact count on hover.
Context Window Bar
A bar that shows what fills the AI's memory for this chat: instructions, files, chat history and room left for the reply.
Credits Remaining Card
Shows how many credits are left this month, when they reset, and a button to buy more. The bar changes color as credits run low.
Rate Limit Banner
A clear banner when someone hits their message limit, with a live countdown to when they can send again and the prompt box turned off.
Cost per Message
A small line under each answer showing tokens in and out and what the message cost. Click it to see the full breakdown.
Daily Usage Chart
A small bar chart of tokens used each day for two weeks. Hover or use the Tab key to read each day's exact number.

Model Price Calculator

How to use it

What you get

The code

More tokens and usage components

Token Ring Meter

Context Window Bar

Credits Remaining Card

Rate Limit Banner

Cost per Message

Daily Usage Chart