UIGEN-FX-4B-08-27/README.md

---
language:
- en
library_name: transformers
pipeline_tag: text-generation
license: apache-2.0
base_model:
- Qwen/Qwen3-4B-Instruct-2507
tags:
- web-generation
- html
- css
- tailwind-css
- ui-generation
- web-design
- small-model
- qwen3
- transformers
model-index:
- name: UIGEN-FX-4B-Preview
  results: []
---
<style>
/* ===== Adaptive Theme (works on dark blue or white backdrops) ===== */
:root{
  color-scheme: light dark;
  /* Dark-default (great over navy/charcoal) */
  --bg: transparent;
  --panel: rgba(15,17,23,.55);
  --panel-solid: #0f1117;
  --ink: #eaf0ff;
  --muted: #a9b3c7;
  --brand: #5b8cff;       /* indigo */
  --brand-2: #45e7c6;     /* mint */
  --border: rgba(255,255,255,.14);
  --glow: rgba(91,140,255,.28);
  --code-bg: #0b1220;
  --code-br: #15233d;
  --pill: rgba(255,255,255,.05);
  --radius: 16px;
}
@media (prefers-color-scheme: light){
  :root{
    /* Light-overrides (great over white/light backdrops) */
    --panel: rgba(255,255,255,.66);
    --panel-solid: #ffffff;
    --ink: #0b0c0f;
    --muted: #4a5568;
    --brand: #3b6dff;
    --brand-2: #22c6a3;
    --border: rgba(0,0,0,.12);
    --glow: rgba(59,109,255,.20);
    --code-bg: #f6f8ff;
    --code-br: #e4e8f7;
    --pill: rgba(0,0,0,.04);
  }
}
/* Fallback: force light palette if host ignores color-scheme */
.on-light{
  --panel: rgba(255,255,255,.66) !important;
  --panel-solid: #ffffff !important;
  --ink: #0b0c0f !important;
  --muted: #4a5568 !important;
  --brand: #3b6dff !important;
  --brand-2: #22c6a3 !important;
  --border: rgba(0,0,0,.12) !important;
  --glow: rgba(59,109,255,.20) !important;
  --code-bg: #f6f8ff !important;
  --code-br: #e4e8f7 !important;
  --pill: rgba(0,0,0,.04) !important;
}

/* ===== Layout & Components ===== */
*{ box-sizing:border-box }
.wrap{
  background: var(--bg);
  padding: 28px; border-radius: 18px;
}
.hero{
  background:
    radial-gradient(600px 240px at 20% 0%, color-mix(in oklab, var(--brand) 18%, transparent), transparent 60%),
    radial-gradient(600px 240px at 80% 10%, color-mix(in oklab, var(--brand-2) 14%, transparent), transparent 60%);
  border:1px solid var(--border);
  border-radius:20px; padding:28px;
  backdrop-filter: saturate(120%) blur(10px);
}
.alert{
  border:1px dashed var(--border); border-radius:14px; padding:12px 14px; margin-bottom:14px;
  background: color-mix(in oklab, var(--brand) 10%, var(--panel));
  color: var(--ink); font-weight:700;
}
.kicker{ display:inline-block; letter-spacing:.12em; text-transform:uppercase; color:var(--muted); font-size:.75rem; margin-bottom:.5rem }
h1,h2,h3{ color:var(--ink); margin:0 0 .4rem 0; line-height:1.1 }
h1{ font-size:2.25rem; font-weight:800 }
h2{ font-size:1.3rem; font-weight:700; margin-top:1.25rem }
h3{ font-size:1.05rem; font-weight:700 }
p,li{ color:var(--muted); line-height:1.6 }
hr{ border:none; height:1px; background:var(--border); margin:28px 0 }
.tagline{ font-size:1.05rem; color: color-mix(in oklab, var(--ink) 78%, var(--muted)); }

a.btn{
  display:inline-block; padding:.7rem 1rem; border-radius:12px;
  background: linear-gradient(180deg,var(--brand), color-mix(in oklab, var(--brand) 65%, #2b50ff));
  color:#fff; text-decoration:none; font-weight:600;
  box-shadow: 0 10px 30px var(--glow);
}
a.btn.ghost{
  background:transparent; color:var(--ink);
  border:1px solid var(--border);
}

.pill{
  display:inline-flex; align-items:center; gap:.4rem;
  padding:.35rem .6rem; border-radius:999px; border:1px dashed var(--border);
  background: var(--pill); color: color-mix(in oklab, var(--ink) 70%, var(--muted));
}

.grid{ display:grid; gap:18px }
.grid-2{ grid-template-columns:repeat(2,minmax(0,1fr)); }
.grid-3{ grid-template-columns:repeat(3,minmax(0,1fr)); }
@media(max-width:900px){ .grid-2,.grid-3{ grid-template-columns:1fr } }

.card{
  background: linear-gradient(180deg, color-mix(in oklab, var(--panel) 92%, transparent), transparent);
  border:1px solid var(--border);
  border-radius: var(--radius);
  padding:16px;
  backdrop-filter: blur(6px) saturate(120%);
}

.codeblock{
  background: var(--code-bg); border:1px solid var(--code-br); border-radius:12px; padding:8px; overflow:auto;
  margin: 1rem 0;
}
.codeblock pre{ margin:0; font-size:.92rem }

figure.screens{ display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:10px; margin:16px 0 0 0 }
figure.screens img{ width:100%; border-radius:12px; border:1px solid var(--border) }

table{ width:100%; border-collapse:collapse }
th,td{ text-align:left; padding:10px; border-bottom:1px solid var(--border); color:var(--muted) }
th{ color: color-mix(in oklab, var(--brand) 70%, var(--ink)); }

/* Badges */
.badge{ display:inline-flex; align-items:center; gap:.5rem; padding:.35rem .6rem; border:1px solid var(--border); border-radius:999px; color:var(--muted); font-size:.85rem }
</style>

<!-- Add class="on-light" to .wrap if host forces light background and ignores color-scheme -->
<div class="wrap">

  <div class="hero">
    <div class="alert">@@@ ALERT @@@ — Research Preview: some generations may not be ready for production. Use repeat_penalty or frequency_penalty at >= 1.1</div>
    <span class="kicker">Tesslate • UIGEN Series</span>
    <h1>UIGEN-FX-4B-Preview</h1>
    <p class="tagline">
      <strong>FX</strong> = “Frontend Engineer.” This upgrade in the UIGEN line focuses on <strong>better visual polish</strong>,
      <strong>functional structure</strong>, and <strong>web-ready markup</strong> to ship cleaner, more complete websites from a single prompt.
    </p>

  <div style="display:flex; gap:12px; flex-wrap:wrap; margin:14px 0 2px">
    <span class="pill">Open weights</span>
    <span class="pill">Web-only bias</span>
    <span class="pill">Mobile-first output</span>
    <span class="pill">Minimal JS by default</span>
  </div>

  <div style="display:flex; gap:12px; flex-wrap:wrap; margin-top:14px">
    <a class="btn" href="https://huggingface.co/Tesslate/UIGEN-FX-4B-Preview">Model Repo</a>
    <a class="btn ghost" href="https://designer.tesslate.com/">Try in Designer</a>
    <a class="btn ghost" href="https://uigenoutput.tesslate.com">Demos</a>
    <a class="btn ghost" href="https://tesslate.com">Website</a>
    <a class="btn ghost" href="https://discord.gg/EcCpcTv93U">Discord</a>
  </div>

  <figure class="screens">
    <img alt="Hero sample" src="https://cdn-uploads.huggingface.co/production/uploads/64d1129297ca59bcf7458d07/XnvaCsQedG5HgOP1NgiUY.png">
    <img alt="Pricing sample" src="https://cdn-uploads.huggingface.co/production/uploads/64d1129297ca59bcf7458d07/-Z6cHx_pvQIy69nVVbzFu.png">
    <img alt="Features sample" src="https://cdn-uploads.huggingface.co/production/uploads/64d1129297ca59bcf7458d07/mTKc_Foro9VfozsH-6pmK.png">
    <img alt="Hero alt" src="https://cdn-uploads.huggingface.co/production/uploads/64d1129297ca59bcf7458d07/nFaWL_tEU1URlks24qlBA.png">
    <img alt="Pricing alt" src="https://cdn-uploads.huggingface.co/production/uploads/64d1129297ca59bcf7458d07/6ZUhm4jJld1w8BHeaXGA4.png">
    <img alt="Features alt" src="https://cdn-uploads.huggingface.co/production/uploads/64d1129297ca59bcf7458d07/_qXbVgYGlKVfY4IONEkhR.png">
  </figure>
  </div>

  <hr/>

  <div class="grid grid-2" style="margin-top:1.2rem">
    <div class="card">
      <h3>What is FX?</h3>
      <p>
        <strong>UIGEN-FX-4B-Preview</strong> is a 4B parameter UI generation model tuned to behave like a
        <em>frontend engineer across 22 Frameworks. </em>
      </p>
    </div>
    <div class="card">
      <h3>Why 4B?</h3>
      <p>
        Small enough for laptops and fast iteration, while keeping strong structure and visual consistency.
        FX emphasizes <em>layout rhythm, spacing, and component composition</em> to reduce cleanup work.
      </p>
    </div>
  </div>

  <hr/>

  <h2>Quickstart</h2>

  <h3>Transformers</h3>
  <div class="codeblock"><pre>
from transformers import AutoModelForCausalLM, AutoTokenizer
import torch

model_id = "Tesslate/UIGEN-FX-4B-Preview"
tok = AutoTokenizer.from_pretrained(model_id)
model = AutoModelForCausalLM.from_pretrained(
    model_id,
    torch_dtype=torch.bfloat16,
    device_map="auto"
)

prompt = """Make a single-file landing page for 'LatticeDB'.
Style: modern, generous whitespace, Tailwind, rounded-xl, soft gradients.
Sections: navbar, hero (headline + 2 CTAs), features grid, pricing (3 tiers),
FAQ accordion, footer. Constraints: semantic HTML, no external JS."""

inputs = tok(prompt, return_tensors="pt").to(model.device)
out = model.generate(**inputs, max_new_tokens=2200, temperature=0.6, top_p=0.9)
print(tok.decode(out[0], skip_special_tokens=True))
</pre></div>

  <h3>vLLM</h3>
  <div class="codeblock"><pre>
vllm serve Tesslate/UIGEN-FX-4B-Preview \
  --host 0.0.0.0 --port 8000 \
  --max-model-len 65536 \
  --gpu-memory-utilization 0.92
</pre></div>

  <h3>sglang</h3>
  <div class="codeblock"><pre>
python -m sglang.launch_server \
  --model-path Tesslate/UIGEN-FX-4B-Preview \
  --host 0.0.0.0 --port 5000 \
  --mem-fraction-static 0.94 \
  --attention-backend flashinfer \
  --served-model-name UIGEN-FX-4B-Preview
</pre></div>

  <blockquote><strong>Tip:</strong> Lower temperature (0.4–0.6) yields stricter, cleaner markup; raise it for more visual variety.</blockquote>

  <hr/>

  <h2>Suggested Inference Settings</h2>
  <table>
    <thead><tr><th>Param</th><th>Value</th><th>Notes</th></tr></thead>
    <tbody>
      <tr><td><code>temperature</code></td><td>0.6</td><td>Balance creativity &amp; consistency (lower if quantized)</td></tr>
      <tr><td><code>top_p</code></td><td>0.9</td><td>Nucleus sampling</td></tr>
      <tr><td><code>top_k</code></td><td>40</td><td>Optional vocab restriction</td></tr>
      <tr><td><code>max_new_tokens</code></td><td>1200–2500</td><td>Single-file sites often fit &lt; 1800</td></tr>
      <tr><td><code>repetition_penalty</code></td><td>1.08–1.15</td><td>Reduces repetitive classes/markup</td></tr>
    </tbody>
  </table>

  <hr/>

  <h2>Prompts that work well</h2>
  <div class="grid grid-2">
    <div class="card">
      <h3>Starter</h3>
      <div class="codeblock"><pre>
Make a single-file landing page for "RasterFlow" (GPU video pipeline).
Style: modern tech, muted palette, Tailwind, rounded-xl, subtle gradients.
Sections: navbar, hero (big headline + 2 CTAs), logos row, features (3x cards),
code block (copyable), pricing (3 tiers), FAQ accordion, footer.
Constraints: semantic HTML, no external JS. Return ONLY the HTML code.
</pre></div>
    </div>
    <div class="card">
      <h3>Design-strict</h3>
      <div class="codeblock"><pre>
Use an 8pt spacing system. Palette: slate with indigo accents.
Typography scale: 14/16/18/24/36/56. Max width: 1200px.
Avoid shadows &gt; md; prefer borders/dividers; keep line-length ~68ch.
</pre></div>
    </div>
  </div>

  <hr/>

  <h2>Quantization &amp; VRAM (example)</h2>
  <table>
    <thead><tr><th>Format</th><th>Footprint</th><th>Notes</th></tr></thead>
    <tbody>
      <tr><td>BF16</td><td>~8.1 GB</td><td>Fastest, best fidelity</td></tr>
      <tr><td>GGUF Q5_K_M</td><td>~2.9 GB</td><td>Great quality/size trade-off</td></tr>
      <tr><td>GGUF Q4_K_M</td><td>~2.5 GB</td><td>Laptop-friendly</td></tr>
    </tbody>
  </table>

  <hr/>

  <h2>Intended Use &amp; Scope</h2>
  <ul>
    <li><strong>Primary:</strong>React, Tailwind, Javascript, Static Site generators, Python Frontend WebUI</li>
    <li><strong>Secondary:</strong> Component blocks (hero, pricing, FAQ) for manual composition</li>
  </ul>

  <details>
    <summary><strong>Limitations</strong></summary>
    <ul>
      <li>Accessibility: headings/labels are encouraged; ARIA coverage may need review.</li>
      <li>Complex widgets: JS kept minimal unless requested; consider post-edit for heavy interactivity.</li>
    </ul>
  </details>

  <details>
    <summary><strong>Ethical Considerations</strong></summary>
    <ul>
      <li>Use rights-cleared assets when adding logos/images.</li>
      <li>Curate prompts responsibly; review outputs before production use.</li>
    </ul>
  </details>

  <hr/>

  <h2>Training Summary (research preview)</h2>
  <ul>
    <li><strong>Base:</strong> <code>Qwen/Qwen3-4B-Instruct-2507</code></li>
    <li><strong>Objective:</strong> Web-only bias; reward semantic structure, spacing rhythm, responsive blocks; improved visual polish vs earlier UIGEN releases.</li>
    <li><strong>Data:</strong> Curated HTML/CSS/Tailwind snippets, component libraries, synthetic page specs &amp; layout constraints.</li>
    <li><strong>Recipe:</strong> SFT with format constraints → instruction tuning → preference optimization on style/structure.</li>
    <li><strong>Context:</strong> effective ~64k; default generations sized for practical single-file pages.</li>
  </ul>

  <hr/>

  <h2>Community</h2>
  <ul>
    <li><strong>Examples:</strong> <a href="https://uigenoutput.tesslate.com">uigenoutput.tesslate.com</a></li>
    <li><strong>Discord:</strong> <a href="https://discord.gg/EcCpcTv93U">discord.gg/EcCpcTv93U</a></li>
    <li><strong>Website:</strong> <a href="https://tesslate.com">tesslate.com</a></li>
  </ul>

  <blockquote>“FX aims to ship what a frontend engineer would: clean structure first, pretty pixels second.” — Tesslate Team</blockquote>

  <hr/>

  <h2>Citation</h2>
  <div class="codeblock"><pre>
@misc{tesslate_uigen_fx_4b_2025,
  title   = {UIGEN-FX-4B-Preview: Frontend Engineer-tuned web generation (Research Preview)},
  author  = {Tesslate Team},
  year    = {2025},
  url     = {https://huggingface.co/Tesslate/UIGEN-FX-4B-Preview}
}
</pre></div>
</div>