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<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Zero-TVM Chat — LLMs up to a 35B MoE on hand-written WebGPU kernels</title>
<meta name="description" content="Live browser chat with models from Phi-3-mini to the Qwen3.6-35B-A3B sparse MoE, decoding on raw WebGPU. No WebLLM, no TVM, no WASM — hand-written WGSL, readable end-to-end.">
<meta name="theme-color" content="#0a0a0c">
<link rel="icon" href="/favicon.svg" type="image/svg+xml">
<meta property="og:type" content="website">
<meta property="og:url" content="https://zerotvm.com/zero-tvm.html">
<meta property="og:title" content="Zero-TVM Chat — LLMs up to a 35B MoE on hand-written WebGPU kernels">
<meta property="og:description" content="Live browser chat with models from Phi-3-mini to the Qwen3.6-35B-A3B sparse MoE, decoding on raw WebGPU. No WebLLM, no TVM, no WASM — hand-written WGSL, readable end-to-end.">
<meta property="og:image" content="https://zerotvm.com/og.png">
<meta name="twitter:card" content="summary_large_image">
<meta name="twitter:title" content="Zero-TVM Chat — LLMs up to a 35B MoE on hand-written WebGPU kernels">
<meta name="twitter:description" content="Live browser chat with models from Phi-3-mini to the Qwen3.6-35B-A3B sparse MoE, decoding on raw WebGPU. No WebLLM, no TVM, no WASM — hand-written WGSL, readable end-to-end.">
<meta name="twitter:image" content="https://zerotvm.com/og.png">
<link rel="stylesheet" href="/fonts.css">
<link rel="stylesheet" href="/tokens.css">
<link rel="stylesheet" href="/chat-ui.css">
<style>
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body {
height: 100%;
background: var(--bg);
color: var(--text);
font-family: var(--font);
font-size: 15px;
line-height: 1.6;
-webkit-font-smoothing: antialiased;
overflow: hidden;
}
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-2); }
.icon { width: 18px; height: 18px; stroke: currentColor; stroke-width: 2; fill: none; stroke-linecap: round; stroke-linejoin: round; }
/* ─────────── Layout ─────────── */
.app {
display: grid;
grid-template-rows: auto 1fr auto;
height: 100vh;
max-height: 100dvh;
}
/* ─────────── Header ─────────── */
.app-header {
display: flex;
align-items: center;
gap: 0.75rem;
padding: 0.65rem 1rem;
border-bottom: 1px solid var(--border);
background: rgba(10, 10, 12, 0.85);
backdrop-filter: blur(10px);
position: relative;
z-index: 10;
}
.back-link {
display: flex;
align-items: center;
justify-content: center;
width: 32px;
height: 32px;
border-radius: 8px;
color: var(--text-dim);
transition: background 0.15s, color 0.15s;
}
.back-link:hover { background: var(--panel-2); color: var(--text); }
.model-info { display: flex; flex-direction: column; gap: 2px; min-width: 0; position: relative; }
.model-switch {
display: flex; align-items: center; gap: 4px; background: none; border: 0;
padding: 0; margin: 0; cursor: pointer; color: inherit; font: inherit;
border-radius: 5px; align-self: flex-start;
}
.model-switch:hover .chev { opacity: 1; }
.model-switch .chev {
width: 14px; height: 14px; flex: none; fill: none; stroke: currentColor;
stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round;
opacity: 0.45; transition: opacity .15s, transform .15s;
}
.model-switch[aria-expanded="true"] .chev { opacity: 1; transform: rotate(180deg); }
.model-menu {
position: absolute; top: calc(100% + 8px); left: 0; z-index: 60;
min-width: 258px; padding: 5px;
background: #14161b; border: 1px solid #2a2e37; border-radius: 10px;
box-shadow: 0 12px 32px rgba(0,0,0,.55);
}
.model-menu button {
display: flex; width: 100%; align-items: baseline; gap: 8px;
background: none; border: 0; color: #e6e8ec; cursor: pointer;
padding: 8px 10px; border-radius: 7px; text-align: left; font: inherit;
}
.model-menu button:hover { background: #1e222b; }
.model-menu button[aria-selected="true"] { background: #1a2b22; }
.model-menu .mm-name { font-weight: 600; font-size: 0.86rem; }
.model-menu .mm-meta { font-size: 0.7rem; color: #8b93a1; margin-left: auto; white-space: nowrap; }
.model-menu .mm-cached { color: #5fc796; }
.model-info h1 {
font-size: 0.95rem;
font-weight: 600;
letter-spacing: -0.01em;
}
.model-sub {
font-size: 0.72rem;
color: var(--muted);
white-space: nowrap;
overflow: hidden;
text-overflow: ellipsis;
}
.header-spacer { flex: 1; }
/* Sampling popover. Mirrors .model-menu's anchoring; wider because these
are labelled sliders rather than a list of names. */
.samp-wrap { position: relative; }
.header-btn.active { color: var(--accent); border-color: var(--accent); }
.samp-menu {
position: absolute; top: calc(100% + 6px); right: 0; z-index: 40;
width: 300px; padding: 12px; display: flex; flex-direction: column; gap: 12px;
background: var(--panel); border: 1px solid var(--border-2); border-radius: 10px;
box-shadow: 0 12px 32px rgba(0,0,0,.35); font-size: 12px;
}
.samp-menu[hidden] { display: none; }
.samp-head { display: flex; justify-content: space-between; align-items: baseline; }
.samp-head span { color: var(--muted); font-size: 11px; }
.samp-row { display: flex; flex-direction: column; gap: 4px; }
.samp-label { display: flex; justify-content: space-between; color: var(--text); }
.samp-label b { color: var(--accent); font-weight: 600; }
.samp-note { color: var(--muted); font-size: 10.5px; line-height: 1.35; }
.samp-row input[type=range] { width: 100%; accent-color: var(--accent); }
.samp-seed-row { display: flex; gap: 6px; }
.samp-seed-row input {
flex: 1; min-width: 0; padding: 4px 6px; font: inherit; color: var(--text);
background: var(--panel-2); border: 1px solid var(--border); border-radius: 6px;
}
.samp-btn {
padding: 4px 8px; font: inherit; color: var(--text); cursor: pointer;
background: var(--panel-2); border: 1px solid var(--border); border-radius: 6px;
}
.samp-btn:hover { border-color: var(--border-2); }
.samp-reset { align-self: flex-start; }
/* At temperature 0 the other two knobs do nothing — dimming them beats
letting someone move a slider and conclude the feature is broken. */
.samp-menu.samp-greedy #samp-topp-val,
.samp-menu.samp-greedy #samp-minp-val { color: var(--muted); }
.samp-menu.samp-greedy .samp-row:nth-child(3),
.samp-menu.samp-greedy .samp-row:nth-child(4) { opacity: .45; }
.badge {
display: inline-flex;
align-items: center;
gap: 6px;
padding: 4px 10px;
border-radius: 999px;
font-size: 0.72rem;
font-weight: 500;
background: var(--panel-2);
color: var(--text-dim);
border: 1px solid var(--border);
white-space: nowrap;
}
.badge .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--muted); }
.badge.loading { color: #fbbf24; background: rgba(251, 191, 36, 0.08); border-color: rgba(251, 191, 36, 0.24); }
.badge.loading .dot { background: #fbbf24; animation: pulse 1.4s infinite; }
.badge.ready { color: var(--accent); background: var(--accent-tint); border-color: color-mix(in srgb, var(--accent) 30%, transparent); }
.badge.ready .dot { background: var(--accent); }
.badge.error { color: var(--danger); background: rgba(239, 68, 68, 0.08); border-color: rgba(239, 68, 68, 0.25); }
.badge.error .dot { background: var(--danger); }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }
.stats {
font-size: 0.72rem;
color: var(--muted);
font-variant-numeric: tabular-nums;
white-space: nowrap;
}
.header-btn {
display: inline-flex;
align-items: center;
gap: 5px;
padding: 5px 10px;
border-radius: 8px;
font-size: 0.72rem;
color: var(--text-dim);
background: transparent;
border: 1px solid var(--border);
transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.header-btn:hover { background: var(--panel-2); color: var(--text); border-color: var(--border-2); }
.header-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.header-btn .icon { width: 13px; height: 13px; }
/* ─────────── Welcome state ─────────── */
.welcome {
padding: 3rem 1rem 3.5rem;
display: flex;
flex-direction: column;
align-items: center;
gap: 1.1rem;
text-align: center;
}
.welcome.hidden { display: none; }
.welcome-logo {
width: 52px;
height: 52px;
border-radius: 14px;
background: linear-gradient(135deg, var(--accent), var(--accent-hi));
display: flex;
align-items: center;
justify-content: center;
font-weight: 700;
color: #000;
letter-spacing: -0.04em;
font-size: 1.25rem;
box-shadow: 0 8px 32px color-mix(in srgb, var(--accent) 16%, transparent);
}
/* The lettered tile is the fallback. With a mascot mounted the frame gets
out of the way entirely — no plate, no glow, no letter — so the
character reads as the character and not as an icon inside a button. */
.welcome-logo.has-mascot {
width: 148px;
height: 148px;
border-radius: 0;
background: none;
box-shadow: none;
font-size: 0;
}
.welcome-logo canvas { display: block; width: 100%; height: 100%; }
.welcome-title {
font-size: 1.55rem;
font-weight: 600;
letter-spacing: -0.022em;
margin-top: 0.15rem;
}
.welcome-pills {
display: flex;
flex-wrap: wrap;
gap: 0.35rem;
justify-content: center;
margin-top: 0.1rem;
}
.welcome-pill {
font-size: 0.68rem;
color: var(--muted);
padding: 3px 10px;
border: 1px solid var(--border);
border-radius: 999px;
background: var(--panel);
font-variant-numeric: tabular-nums;
}
.welcome-sub {
color: var(--text-dim);
font-size: 0.88rem;
max-width: 480px;
line-height: 1.55;
}
.suggest-grid {
display: grid;
grid-template-columns: repeat(2, minmax(0, 1fr));
gap: 0.6rem;
margin-top: 0.85rem;
width: 100%;
max-width: 560px;
}
.suggest {
display: flex;
gap: 0.6rem;
text-align: left;
padding: 0.7rem 0.85rem;
background: var(--panel);
border: 1px solid var(--border);
border-radius: 12px;
color: var(--text-dim);
font-size: 0.8rem;
transition: background 0.15s, border-color 0.15s, color 0.15s, transform 0.15s;
align-items: flex-start;
}
.suggest:hover {
background: var(--panel-2);
border-color: var(--border-2);
color: var(--text);
transform: translateY(-1px);
}
.suggest:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.suggest .suggest-icon {
width: 28px; height: 28px;
border-radius: 8px;
background: var(--panel-2);
border: 1px solid var(--border);
display: inline-flex;
align-items: center;
justify-content: center;
flex-shrink: 0;
color: var(--accent-2);
}
.suggest .suggest-icon .icon { width: 14px; height: 14px; }
.suggest .suggest-body { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.suggest .suggest-title {
color: var(--text);
font-weight: 500;
font-size: 0.82rem;
letter-spacing: -0.005em;
}
.suggest .suggest-hint {
color: var(--muted);
font-size: 0.72rem;
line-height: 1.4;
}
/* ─────────── Start dialog (pre-download gate) ─────────── */
dialog#start-dialog {
position: fixed;
inset: 0;
margin: auto;
background: var(--panel);
color: var(--text);
border: 1px solid var(--border-2);
border-radius: 16px;
padding: 0;
max-width: 460px;
width: calc(100vw - 2rem);
max-height: calc(100vh - 2rem);
box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
/* No negative margin: it pulled the canvas up into the hero's padding,
where the dialog clipped the character's hair flat. */
.dialog-mascot { display: block; width: 100%; height: 210px; margin: 0 0 0.35rem; }
/* The same character, small, beside the model name — so closing the gate
does not drop the thing the page was themed around. */
.header-mascot { display: block; width: 40px; height: 40px; flex: 0 0 auto; }
.dialog-models { padding: 0.85rem 1.25rem; border-top: 1px solid var(--border); text-align: center; }
.dm-change { font-size: 0.8rem; color: var(--text-dim); }
.dm-change:hover { color: var(--accent); }
.dialog-models .dm-label {
font-size: 0.66rem; text-transform: uppercase; letter-spacing: 0.07em;
color: var(--muted); margin-bottom: 0.5rem;
}
.dialog-models .dm-chips { display: flex; gap: 6px; flex-wrap: wrap; }
/* Only when the picker actually rendered — an empty container must not
leave a gap above the link. */
.dialog-models .dm-chips:not(:empty) { margin-bottom: 0.7rem; }
.dialog-models .dm-chip {
display: flex; flex-direction: column; gap: 1px; flex: 1 1 0; min-width: 96px;
padding: 7px 10px; border-radius: 8px; text-align: left; cursor: pointer;
background: var(--panel-2); border: 1px solid var(--border);
transition: border-color 0.15s, background 0.15s;
}
.dialog-models .dm-chip:hover { border-color: var(--border-2); background: #1b1b22; }
.dialog-models .dm-chip[aria-pressed="true"] {
border-color: var(--accent); background: var(--accent-tint);
}
.dialog-models .dm-chip .n { font-size: 0.78rem; font-weight: 600; color: var(--text); }
.dialog-models .dm-chip .s { font-size: 0.66rem; color: var(--muted); }
.dialog-models .dm-chip[aria-pressed="true"] .s { color: var(--accent); }
dialog#start-dialog::backdrop {
background: rgba(8, 8, 10, 0.82);
backdrop-filter: blur(10px);
}
.dialog-hero {
padding: 1.75rem 1.5rem 1.25rem;
border-bottom: 1px solid var(--border);
text-align: center;
}
.dialog-logo {
width: 52px; height: 52px;
border-radius: 14px;
background: linear-gradient(135deg, var(--accent), var(--accent-hi));
display: inline-flex;
align-items: center;
justify-content: center;
font-weight: 800;
color: #000;
font-size: 1.15rem;
letter-spacing: -0.05em;
margin-bottom: 0.9rem;
}
.dialog-title {
font-size: 1.15rem;
font-weight: 600;
letter-spacing: -0.015em;
margin-bottom: 0.3rem;
}
.dialog-sub {
color: var(--text-dim);
font-size: 0.82rem;
line-height: 1.5;
}
.dialog-stats {
display: grid;
grid-template-columns: repeat(3, 1fr);
padding: 1rem 0.75rem;
border-bottom: 1px solid var(--border);
}
.dstat { text-align: center; padding: 0 0.5rem; }
.dstat .val { font-weight: 600; font-size: 0.95rem; letter-spacing: -0.01em; }
.dstat .lab { font-size: 0.66rem; color: var(--muted); margin-top: 3px; text-transform: uppercase; letter-spacing: 0.05em; }
.dialog-notes {
padding: 0.9rem 1.25rem;
color: var(--text-dim);
font-size: 0.78rem;
line-height: 1.6;
border-bottom: 1px solid var(--border);
}
.dialog-notes ul { margin: 0; padding-left: 1.1rem; }
.dialog-notes li { margin-bottom: 0.2rem; }
.dialog-notes li:last-child { margin-bottom: 0; }
.dialog-actions {
display: flex;
gap: 0.5rem;
padding: 0.85rem 1rem;
}
.dialog-btn {
flex: 1;
padding: 0.65rem 1rem;
border-radius: 10px;
font-weight: 600;
font-size: 0.88rem;
transition: background 0.15s, color 0.15s, opacity 0.15s;
border: 1px solid transparent;
}
.dialog-btn[data-variant="cancel"] {
background: transparent;
color: var(--text-dim);
border-color: var(--border);
}
.dialog-btn[data-variant="cancel"]:hover { background: var(--panel-2); color: var(--text); }
.dialog-btn[data-variant="primary"] {
background: var(--accent);
color: #000;
}
.dialog-btn[data-variant="primary"]:hover:not(:disabled) { background: var(--accent-2); }
.dialog-btn[data-variant="primary"]:disabled { opacity: 0.6; cursor: not-allowed; }
/* ─────────── Loading overlay ─────────── */
.loading-overlay {
position: fixed;
inset: 0;
background: rgba(10, 10, 12, 0.92);
backdrop-filter: blur(8px);
display: none;
align-items: center;
justify-content: center;
z-index: 90;
padding: 1rem;
}
.loading-overlay.active { display: flex; }
.loading-card {
background: var(--panel);
border: 1px solid var(--border-2);
border-radius: 16px;
padding: 1.75rem 1.5rem 1.25rem;
max-width: 440px;
width: 100%;
box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.loading-title {
font-size: 1rem;
font-weight: 600;
margin-bottom: 0.2rem;
}
.loading-status {
color: var(--text-dim);
font-size: 0.82rem;
margin-bottom: 1rem;
min-height: 1.2em;
}
.progress-track {
height: 6px;
background: var(--panel-2);
border-radius: 999px;
overflow: hidden;
}
.progress-fill {
height: 100%;
width: 0;
background: linear-gradient(90deg, var(--accent), var(--accent-hi));
border-radius: 999px;
transition: width 0.25s ease;
}
.progress-detail {
color: var(--muted);
font-size: 0.72rem;
margin-top: 0.5rem;
font-variant-numeric: tabular-nums;
}
.loading-log-details {
margin-top: 0.85rem;
}
.loading-log-details summary {
font-size: 0.74rem;
color: var(--muted);
cursor: pointer;
user-select: none;
list-style: none;
display: inline-flex;
align-items: center;
gap: 4px;
}
.loading-log-details summary::-webkit-details-marker { display: none; }
.loading-log-details summary:hover { color: var(--text-dim); }
.loading-log-details summary::before { content: '▸'; transition: transform 0.15s; font-size: 0.65rem; }
.loading-log-details[open] summary::before { transform: rotate(90deg); }
.loading-log {
margin-top: 0.5rem;
max-height: 140px;
overflow-y: auto;
background: var(--bg);
border: 1px solid var(--border);
border-radius: 8px;
padding: 0.5rem 0.65rem;
font-family: var(--mono);
font-size: 0.7rem;
color: var(--text-dim);
line-height: 1.5;
white-space: pre-wrap;
}
.loading-log::-webkit-scrollbar { width: 6px; }
.loading-log::-webkit-scrollbar-thumb { background: var(--border-2); border-radius: 3px; }
.loading-error {
background: rgba(239, 68, 68, 0.08);
border: 1px solid rgba(239, 68, 68, 0.25);
color: #fca5a5;
padding: 0.65rem 0.8rem;
border-radius: 8px;
font-size: 0.8rem;
margin-top: 0.85rem;
display: none;
}
.loading-error.visible { display: block; }
/* ─────────── Responsive ─────────── */
@media (max-width: 640px) {
.app-header { padding: 0.55rem 0.75rem; }
.model-info h1 { font-size: 0.9rem; }
.model-sub { font-size: 0.68rem; }
.chat-inner { padding: 1rem 0.75rem 1.25rem; }
.composer-wrap { padding: 0.55rem 0.75rem 0.75rem; }
.welcome { padding: 1.25rem 0.5rem 1.5rem; }
.welcome-title { font-size: 1.15rem; }
.suggest-grid { grid-template-columns: 1fr; }
.badge { padding: 3px 8px; font-size: 0.68rem; }
/* The header computed 513px inside a 390px viewport, and body's
overflow-x: hidden CLIPPED the excess rather than scrolling — "New
chat" and the status badge sat past the right edge, unreachable. The
icons and the dot carry the same information; the words are what did
not fit. The h1 also gets an ellipsis: "Qwen3.6-35B-A3B" is wider
than the slot the flex layout leaves it. */
#new-chat-btn span { display: none; }
#badge-text { display: none; }
.model-info h1 { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 42vw; }
.stats { display: none; }
}
</style>
<script type="module" crossorigin src="/assets/zero-tvm-nxGrkTTcQf.js"></script>
<link rel="modulepreload" crossorigin href="/assets/model-registry-BoK-ObgACo.js">
<link rel="modulepreload" crossorigin href="/assets/preload-helper-ckwbz45pO3.js">
<link rel="modulepreload" crossorigin href="/assets/weight-loader-ByOLMd9f5C.js">
<link rel="modulepreload" crossorigin href="/assets/model-select-DhhV9mCi0T.js">
<link rel="modulepreload" crossorigin href="/assets/mascot-BCKWddkWrV.js">
<link rel="modulepreload" crossorigin href="/assets/variants-De-VVc9BRz.js">
<link rel="modulepreload" crossorigin href="/assets/engine-core-CLR3cxsqf4.js">
<link rel="modulepreload" crossorigin href="/assets/loading-ui-CjCwSRuXvh.js">
<link rel="modulepreload" crossorigin href="/assets/chat-ui-CQAxV1po6S.js">
<link rel="modulepreload" crossorigin href="/assets/chat-flow-eTAzKAlIYe.js">
</head>
<body>
<!-- ─────────── Pre-download gate ─────────── -->
<dialog id="start-dialog">
<div class="dialog-hero">
<canvas class="dialog-mascot" id="gate-mascot" aria-hidden="true"></canvas>
<div class="dialog-title">Phi-3-mini on raw WebGPU</div>
<div class="dialog-sub">Runs in your browser on hand-written WGSL kernels. Weights download once and cache locally; prompts and generation stay on this machine.</div>
</div>
<div class="dialog-stats">
<div class="dstat"><div class="val">~2 GB</div><div class="lab">weights</div></div>
<div class="dstat"><div class="val">~70 t/s</div><div class="lab">M2 Max</div></div>
<div class="dstat"><div class="val" id="gate-ctx">—</div><div class="lab">context</div></div>
</div>
<!-- The chips container carries the id, not the wrapper: renderGateChips
clears its host before appending, so putting the id on the wrapper
would delete the link below it. It had no id at all until now, so the
lookup returned null and bailed — the picker has never rendered, and
everyone arriving without ?model= was offered Phi-3 and nothing else.
Empty until the JS fills it; the link works regardless. -->
<div class="dialog-models">
<div class="dm-chips" id="dialog-models"></div>
<a class="dm-change" href="/#models">Pick a different model →</a>
</div>
<div class="dialog-notes">
<ul>
<li>Cached after first load — next visit starts in seconds</li>
<li>Chrome 113+ / Edge 113+ with shader-f16 required</li>
<li>Progress and detailed log shown while downloading</li>
</ul>
</div>
<div class="dialog-actions">
<a class="dialog-btn" data-variant="cancel" href="/">Not now</a>
<button class="dialog-btn" data-variant="primary" id="start-btn" autofocus>Download & start →</button>
</div>
</dialog>
<!-- ─────────── Loading overlay ─────────── -->
<!-- Ships with .active: boot begins the moment the page loads, so the
progress/error card must be visible from the first frame. chat.ts's
hideLoadingOverlay() removes the class once the engine is ready. -->
<div class="loading-overlay active" id="loading-overlay">
<div class="loading-card">
<div class="loading-title" id="loading-title">Preparing Zero-TVM</div>
<div class="loading-status" id="progress-status">Starting…</div>
<div class="progress-track"><div class="progress-fill" id="progress-bar"></div></div>
<div class="progress-detail" id="progress-detail">0%</div>
<details class="loading-log-details">
<summary>Details</summary>
<pre class="loading-log" id="progress-log"></pre>
</details>
<div class="loading-error" id="loading-error"></div>
</div>
</div>
<!-- ─────────── App shell ─────────── -->
<div class="app">
<header class="app-header">
<a href="/" class="back-link" title="Back to zerotvm.com" aria-label="Back to zerotvm.com">
<svg class="icon" viewBox="0 0 24 24"><path d="M19 12H5M12 19l-7-7 7-7"/></svg>
</a>
<div class="model-info">
<button class="model-switch" id="model-switch" type="button" aria-haspopup="listbox" aria-expanded="false">
<h1 id="model-name">Phi-3-mini</h1>
<svg class="chev" viewBox="0 0 24 24" aria-hidden="true"><path d="M6 9l6 6 6-6"/></svg>
</button>
<div class="model-sub" id="model-sub">hand-written WGSL · paged KV · WebGPU</div>
<div class="model-menu" id="model-menu" role="listbox" hidden></div>
</div>
<div class="header-spacer"></div>
<span class="stats" id="stats"></span>
<div class="samp-wrap">
<button class="header-btn" id="sampling-btn" type="button" title="Sampling: off (greedy)" aria-haspopup="dialog" aria-expanded="false">
<svg class="icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round">
<path d="M4 6h10M18 6h2M4 12h4M12 12h8M4 18h12M20 18h0"/>
<circle cx="16" cy="6" r="2"/><circle cx="10" cy="12" r="2"/><circle cx="18" cy="18" r="2"/>
</svg>
</button>
<div class="samp-menu" id="sampling-menu" role="dialog" aria-label="Sampling settings" hidden></div>
</div>
<button class="header-btn" id="new-chat-btn" type="button" title="New chat" disabled>
<svg class="icon" viewBox="0 0 24 24"><path d="M12 5v14M5 12h14"/></svg>
<span>New chat</span>
</button>
<span class="badge" id="badge"><span class="dot"></span><span id="badge-text">Waiting</span></span>
</header>
<main class="chat-main" id="chat-main">
<div class="chat-inner">
<div class="welcome" id="welcome">
<div class="welcome-logo" id="welcome-logo">Z</div>
<div class="welcome-title">Chat with Phi-3-mini</div>
<div class="welcome-pills">
<span class="welcome-pill" id="welcome-quant">q4f16_1 · 3.8 B</span>
<span class="welcome-pill" id="welcome-ctx">4 K context</span>
<span class="welcome-pill">Runs on your GPU · WebGPU</span>
<span class="welcome-pill">On-device only</span>
</div>
<div class="welcome-sub">Running on your own GPU through hand-written WGSL kernels. Prompts, tokens and the KV cache stay in this tab.</div>
<div class="suggest-grid" id="suggest-grid">
<!-- Answerable because chat-flow.ts's system prompt carries the
zero-tvm facts — none of these models saw zerotvm.com in
training. -->
<button class="suggest" data-prompt="What is zero-tvm, and what makes it different from other ways of running an LLM in a browser?">
<span class="suggest-icon"><svg class="icon" viewBox="0 0 24 24"><path d="M12 2l10 10-10 10L2 12z"/><path d="M8 12h3l1.5-2.5L14 14l1.5-2H17"/></svg></span>
<span class="suggest-body">
<span class="suggest-title">What is zero-tvm?</span>
<span class="suggest-hint">The engine you are talking through</span>
</span>
</button>
<button class="suggest" data-prompt="Explain WebGPU compute shaders in three sentences.">
<span class="suggest-icon"><svg class="icon" viewBox="0 0 24 24"><path d="M12 2v20M2 12h20M4.93 4.93l14.14 14.14M19.07 4.93L4.93 19.07"/></svg></span>
<span class="suggest-body">
<span class="suggest-title">Explain WebGPU</span>
<span class="suggest-hint">Compute shaders in three sentences</span>
</span>
</button>
<button class="suggest" data-prompt="Write a TypeScript memoized fibonacci with a short test block that prints fib(10), fib(20), and fib(30).">
<span class="suggest-icon"><svg class="icon" viewBox="0 0 24 24"><path d="M16 18l6-6-6-6M8 6l-6 6 6 6"/></svg></span>
<span class="suggest-body">
<span class="suggest-title">Write TypeScript</span>
<span class="suggest-hint">Memoized fib with a tiny test block</span>
</span>
</button>
<button class="suggest" data-prompt="Summarize how a transformer decode step works, focusing on what the KV cache actually stores.">
<span class="suggest-icon"><svg class="icon" viewBox="0 0 24 24"><path d="M4 6h16M4 12h16M4 18h10"/></svg></span>
<span class="suggest-body">
<span class="suggest-title">Summarize</span>
<span class="suggest-hint">What the KV cache actually stores</span>
</span>
</button>
<button class="suggest" data-prompt="List four kinds of questions where a 3.8B model like Phi-3-mini is likely to fall short compared to a frontier LLM, with one-sentence reasons.">
<span class="suggest-icon"><svg class="icon" viewBox="0 0 24 24"><circle cx="12" cy="12" r="9"/><path d="M12 8v4M12 16h.01"/></svg></span>
<span class="suggest-body">
<span class="suggest-title">Honest comparison</span>
<span class="suggest-hint">Where a 3.8B model falls short</span>
</span>
</button>
</div>
</div>
<div id="messages"></div>
</div>
<button class="scroll-fab" id="scroll-fab" title="Scroll to bottom" aria-label="Scroll to bottom">
<svg class="icon" viewBox="0 0 24 24"><path d="M12 5v14M19 12l-7 7-7-7"/></svg>
</button>
</main>
<div class="composer-wrap">
<form class="composer" id="composer">
<textarea id="inp" rows="1" placeholder="Waiting for model…" aria-label="Message" disabled></textarea>
<button class="composer-btn" data-variant="send" id="btn" type="submit" disabled aria-label="Send">
<svg class="icon" viewBox="0 0 24 24"><path d="M5 12l14-7-7 14-2-5-5-2z"/></svg>
</button>
<button class="composer-btn" data-variant="stop" id="stop-btn" type="button" hidden aria-label="Stop">
<svg class="icon" viewBox="0 0 24 24" fill="currentColor" stroke="none"><rect x="7" y="7" width="10" height="10" rx="2"/></svg>
</button>
</form>
<div class="composer-hint">
<kbd>Enter</kbd> to send · <kbd>Shift</kbd>+<kbd>Enter</kbd> for new line ·
<span id="ctx-hint" style="color:var(--text-dim)">Zero TVM · 10 WGSL kernel roles</span>
</div>
</div>
</div>
</body>
</html>
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