{
  "date": "2026-10-16",
  "purpose": "One background-only prompt example; no quality, speed or conversion benchmark",
  "sampleCount": 1,
  "selectionRule": "First completed output from this prompt; no generated alternatives selected",
  "model": "nano-banana-2.1",
  "input": {
    "prompt": "Create a photographic background for a bicycle puncture-repair tutorial thumbnail, landscape 16:9. Show a softly defocused charcoal workshop wall with a small rack of bicycle wrenches confined to the far right edge. A warm sidelight falls from the upper right. Keep the left half plain dark charcoal for a title, and the centre and lower-right foreground quiet and empty for a real repair-photo cutout that I will add later. Strong separation between the dark wall and the softly lit tool silhouettes, very little small detail. No people, hands, bicycles, wheels, inner tubes, patches, lettering, logos, numbers, screens or borders. Draw the background only.",
    "size": "16:9",
    "resolution": "4K"
  },
  "generatedAt": "2026-10-16T05:09:29.019Z",
  "referenceImages": [],
  "original": {
    "sha256": "20f6f3ad47f387953168e470fcbd8973087d3311b0bf1b1a5d1e41e90c7565df",
    "format": "png",
    "width": 5504,
    "height": 3072,
    "retainedPrivately": true
  },
  "published": {
    "file": "/blog/ai-youtube-thumbnail-backgrounds/workshop-sample.webp",
    "sha256": "89e4eba2380ff90ae8f9129308078ae8312f723d9315b66722af6c4890dfa5b2",
    "transformation": "Resized proportionally to 1600 pixels wide; WebP quality 86; no crop or retouching"
  },
  "observation": "An empty dark left/central area and a soft-focus wrench rack on the right; no repair photo or title has been added",
  "limitations": [
    "One output does not establish consistency or a success rate",
    "The supplied prompts for soldering and spreadsheets are untested starting recipes",
    "This is a generated setting, not a photograph of a real workshop or evidence of a repaired tube"
  ],
  "catalog": {
    "checkedAt": "2026-10-16",
    "endpoint": "https://api.api-stock.com/api/v1/catalog",
    "currency": "USD",
    "nanoBanana21": {
      "1k": "0.014",
      "2k": "0.014",
      "4k": "0.014"
    },
    "seedream50ProTextOnly": {
      "2K": "0.084"
    },
    "note": "Public catalog tariffs; no inference from the generating account's charge"
  }
}