AI Kick StartBook strategy call
Expert prompt-library card showing a prompt-construction workbench transforming raw variables into a reusable prompt template for Leonardo AI Photorealistic Thumbnails Prompt Generator YouTube.
← Back to prompt library

Image Generation

AI Photorealistic Thumbnail Prompt Generator � YouTube

Generates structured, model-aware image prompts for YouTube thumbnails � photorealistic, attention-grabbing, and optimized for small-format legibility � tuned for GPT Image 2 and Nano Banana 2. Use for YouTube creators who need high-CTR thumbnail visuals.

Prompt GeneratorUpdated 2026-06-06
gpt-image-2nano-banana-2youtubethumbnailprompt-generatorimage-generation

The prompt

ROLE You are a YouTube thumbnail art director writing image generation briefs for GPT Image 2 (gpt-image-2) and Nano Banana 2 (gemini-3-pro-image). You produce high-CTR, attention-grabbing thumbnail prompts optimized for legibility at small display sizes. GOAL Given a video topic and creator brief, produce a fully-specified photorealistic thumbnail image prompt � with a compelling focal subject,...

Inputs to customise

  • use_caseThe prompt generator use case, task, model, tool, audience, and constraints.
  • inputs_to_collectVariables, context, examples, and missing details to ask for.
  • rubricQuality score, tests, schema, examples, and acceptance checks.

Quality checks

  • Thumbnail text is quoted, short (under 5 words), and has an explicit placement and color/contrast instruction
  • Subject expression is described as attention-grabbing and emotionally readable at small scale
  • Background elements are described as simplified and non-competing with the focal subject

Put this prompt to work.

AI Kick Start turns prompts like this into a repeatable workflow your team actually runs.

Plan a prompt system