YouTube thumbnail: which AI does it best?
Nano Banana 2.1 wins with 8.7/10. Behind it: Ideogram 4.0 (8.0). One image per model, unedited.
YouTube thumbnail: a shocked man pointing at a giant glowing graph, high contrast.| # | Model | Overall | adherence | quality | artifacts | Cost | Render |
|---|---|---|---|---|---|---|---|
| 1 | Nano Banana 2.1 | 8.7 | 9 | 9 | 8 | $0.04 | 37s |
| 2 | Ideogram 4.0 | 8.0 | 8 | 8 | 8 | $0.07 | 26s |
Best per category: adherence Nano Banana (9) · quality Nano Banana (9) · artifacts all tied (8)
Every output, ranked
#1 Nano Banana 2.1
Nano Banana 2.1 8.7 adherence 9quality 9artifacts 8
Strong shocked face, high contrast, glowing graph; busy numbers.
#2 Ideogram 4.0
Ideogram 4.0 8.0 adherence 8quality 8artifacts 8
Pointing at glowing graph, added 'INSANE!' text; shock is mild.
FAQ
Which AI is best for "AI YouTube thumbnail"?
In our October 2026 test of this exact prompt, Nano Banana 2.1 wins with 8.7/10, ahead of Ideogram 4.0 (8.0). Nano Banana 2.1's output: Strong shocked face, high contrast, glowing graph; busy numbers.
What exact prompt was used?
“YouTube thumbnail: a shocked man pointing at a giant glowing graph, high contrast.” Every model got the same prompt with default settings, and one best-effort retry only if a generation failed.
How were the outputs scored?
Each output was scored without knowing which model made it, from 1 to 10 on adherence, quality, artifacts. The overall score is the average of those.
Keep exploring
Nano Banana 2.1 vs Ideogram 4.0 head-to-head · Best for text and logos · Best for YouTube creators · All 20 prompts on one page · October rankings
More image tests: Photoreal portrait of an old fisherman · Poster with the exact text "GRAND OPENING SATURDAY" · Isometric cozy bedroom illustration · Skincare product flat-lay · Fantasy island map · Rooftop selfie (the hands test) · Character sheet with consistent turnarounds