<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 750" role="img" aria-label="GPT-5.6 cover">
  <defs>
    <linearGradient id="bg" x1="0%" y1="0%" x2="0%" y2="100%">
      <stop offset="0%" stop-color="#0a1418"/>
      <stop offset="100%" stop-color="#060a0e"/>
    </linearGradient>
    <radialGradient id="sunGlow" cx="50%" cy="50%" r="50%">
      <stop offset="0%" stop-color="#ffb347" stop-opacity="0.85"/>
      <stop offset="45%" stop-color="#f59e0b" stop-opacity="0.28"/>
      <stop offset="100%" stop-color="#f59e0b" stop-opacity="0"/>
    </radialGradient>
    <filter id="dotGlow" x="-80%" y="-80%" width="260%" height="260%">
      <feGaussianBlur stdDeviation="8" result="b"/>
      <feMerge>
        <feMergeNode in="b"/>
        <feMergeNode in="SourceGraphic"/>
      </feMerge>
    </filter>
  </defs>

  <rect width="1200" height="750" fill="url(#bg)"/>

  <!-- subtle grid -->
  <g stroke="#142028" stroke-width="1">
    <path d="M0,125 H1200"/><path d="M0,250 H1200"/><path d="M0,375 H1200"/><path d="M0,500 H1200"/><path d="M0,625 H1200"/>
    <path d="M150,0 V750"/><path d="M300,0 V750"/><path d="M450,0 V750"/><path d="M600,0 V750"/><path d="M750,0 V750"/><path d="M900,0 V750"/><path d="M1050,0 V750"/>
  </g>

  <!-- solar system -->
  <g transform="translate(760,390)">
    <!-- dashed orbits -->
    <circle r="150" fill="none" stroke="#2b3a44" stroke-width="2" stroke-dasharray="6 8"/>
    <circle r="245" fill="none" stroke="#22303a" stroke-width="2" stroke-dasharray="6 8"/>

    <!-- central core -->
    <circle r="120" fill="url(#sunGlow)"/>
    <circle r="46" fill="#f59e0b" filter="url(#dotGlow)"/>
    <circle r="46" fill="none" stroke="#ffd9a0" stroke-width="4"/>
    <circle r="20" fill="#fff3df"/>

    <!-- Terra: teal, upper-left inner orbit -->
    <g transform="rotate(-118) translate(150,0) rotate(118)">
      <circle r="20" fill="#2dd4bf" filter="url(#dotGlow)"/>
      <text x="-6" y="-38" text-anchor="end" font-family="'Segoe UI', system-ui, sans-serif" font-size="27" font-weight="600" fill="#f2f5f7">Terra</text>
    </g>

    <!-- Sol: orange, right outer orbit, largest planet -->
    <g transform="rotate(-8) translate(245,0) rotate(8)">
      <circle r="28" fill="#f59e0b" filter="url(#dotGlow)"/>
      <text x="44" y="10" font-family="'Segoe UI', system-ui, sans-serif" font-size="27" font-weight="600" fill="#f2f5f7">Sol</text>
    </g>

    <!-- Luna: light blue, lower inner orbit -->
    <g transform="rotate(112) translate(150,0) rotate(-112)">
      <circle r="15" fill="#7dd3fc" filter="url(#dotGlow)"/>
      <text x="28" y="26" font-family="'Segoe UI', system-ui, sans-serif" font-size="27" font-weight="600" fill="#f2f5f7">Luna</text>
    </g>
  </g>

  <!-- copy -->
  <text x="70" y="120" font-family="'Segoe UI', system-ui, sans-serif" font-size="88" font-weight="700" letter-spacing="-1" fill="#f2f5f7">GPT-5.6</text>
  <text x="73" y="178" font-family="ui-monospace, 'Cascadia Code', Consolas, monospace" font-size="27" font-weight="600" letter-spacing="6" fill="#2dd4bf">OPENAI REASONING TRINITY</text>

  <text x="70" y="690" font-family="ui-monospace, 'Cascadia Code', Consolas, monospace" font-size="26" font-weight="600" letter-spacing="6" fill="#8b98a5">AGENTIC EXECUTION LAYER</text>
</svg>
