Logo generation

Spec

• Master: 1024×1024 RGBA PNG, transparent background, subject centered in 80% safe zone
• Vector: SVG, ≤200 paths, fixed viewBox, SVGO optimized
• Monochrome: 1-color mono variant (auto-derived via luminance threshold or separate generation)
• Wordmark routing — model-specific, not blanket:
  • Paragraph-length OK: gpt-image-2, gemini-3-pro-image-preview (Nano Banana Pro), gpt-image-1.5. Include the wordmark in the prompt; composite stays safer for pixel-exact UI copy.
  • 3–10 words reliable: ideogram-3 / ideogram-3-turbo, gemini-3.1-flash-image-preview (Nano Banana 2), gpt-image-1, flux-2 family.
  • ≤3 words / ≤25 chars: Imagen 4 family, Recraft V4.
  • Composite always: Flux 1.x, Flux Schnell, SDXL, SD 1.5, Mystic, Pollinations, original Nano Banana 1.