AI YouTube thumbnails
A thumbnail is the only part of a video that has to work at 210 pixels wide. That makes it the highest-leverage image a creator makes all week.
What a thumbnail set costs
| Ten concept draftsFlux 2 Dev · 10 × 1 cr | 10 |
| Two finals on a text-savvy modelGPT Image 1.5 · 2 × 20 cr | 40 |
| Cut out the subjectBackground removal · 1 × 10 cr | 10 |
| Upscale the winnerUpscale · 1 × 10 cr | 10 |
Credit costs are live from the catalogue; the cash figure is Starter-plan pricing.
Thumbnails reward volume and contrast, not craft. The best-performing frame is usually the third or fourth idea, not the first, and you only find it by making several.
At a credit a draft, making ten is a rounding error. The discipline is judging them small: shrink every candidate to thumbnail size before you pick, because that is the only size anyone will see it at.
The workflow
How it actually runs.
Each step links to the part of the studio that does it.
Ten cheap ideas
One credit each. Go wide on concept rather than polishing one frame.
AI image generatorFinish the two contenders
Re-run the strongest ideas on a premium model for the detail and contrast that survives compression.
AI image generatorCut out the subject
Background removal gives you the face-on-colour look that reads at any size.
Background removerUpscale for safety
Ten credits buys headroom for a 1280×720 export that is not soft.
AI image upscalerWatch out
Where this goes wrong.
- Judge every candidate at thumbnail size. Detail that disappears at 210px is detail you paid for twice.
- Long headlines inside the image do not survive. Three words maximum, set in your editor if they must be exact.
- A real face outperforms a generated one for channels built on a person — cut yourself out and place yourself on generated art.
- Platform rules about misleading thumbnails apply exactly as they do to photographs.
FAQ
What people ask.
Yes, and the cost structure suits it: ten concepts on a 1-credit model is ten credits, so testing is effectively free. Use GPT Image 1.5 when short text has to sit inside the image, and cut out a real photo of yourself to place on generated art if your channel is built around your face.
YouTube wants 1280×720. Generate at the closest 16:9 size the model offers and upscale for ten credits if the export looks soft — a thumbnail that is blurry at full size looks cheap in a sidebar even when it reads fine small.
Keep it to three words and use GPT Image 1.5, which holds short type better than the rest here. For anything that has to be exactly right, generate the art here and set the type in your editor — that also lets you test different headlines against the same image.
Ten drafts, two premium finals, a cut-out and an upscale comes to around 70 credits — roughly 20 cents at Starter pricing, for a set you can A/B test.
Next door
Related jobs.
Run the first one today
22 credits a day on the free account, no card. That is enough to get through the draft stage of this workflow.