Image models compared
Nano Banana Pro vs Seedream 5.0 Lite: the same prompts, side by side
Google's Nano Banana Pro and ByteDance's Seedream 5.0 Lite on the same 16 prompts, two for each of 8 jobs, from logos to YouTube thumbnails: each image as it was made, what the checks found, what it cost and how long it took.
Based on 32 images made on September 29, 2026 through kie.ai with llmwise's own settings for each model, each checked by Claude Sonnet 5.5. How the images are checked.
Short answer
On our 16 image test prompts, Seedream 5.0 Lite passed 14 and Nano Banana Pro 13, each image checked the same way. Nano Banana Pro was quicker, 36.2 s an image against 47.0 s. In llmwise a Nano Banana Pro image counts as 5 Claude Haiku 4.5 messages and a Seedream 5.0 Lite image as 2 Claude Haiku 4.5 messages: up to 50 and 125 images a month on Pro.
Nano Banana Pro and Seedream 5.0 Lite in llmwise
What llmwise asks Nano Banana Pro and Seedream 5.0 Lite for, and what an image of each counts as.
| Fact | Nano Banana Pro | Seedream 5.0 Lite |
|---|---|---|
| Made by | ByteDance | |
| Made through | kie.ai | kie.ai |
| Output size | 2K | 2K |
| Aspect ratios | square 1:1, portrait 2:3, landscape 3:2 | square 1:1, portrait 2:3, landscape 3:2 |
| An image counts as | 5 Claude Haiku 4.5 messages | 2 Claude Haiku 4.5 messages |
| Images on Pro | up to 50 a month | up to 125 a month |
Job by job
Nano Banana Pro passed 13 of 16 and Seedream 5.0 Lite 14 of 16. A prompt passes when every piece of writing it asked for is there and every question about the image is a yes.
| Job | Nano Banana Pro | Seedream 5.0 Lite |
|---|---|---|
| Logos | 2 of 2 passed, 12 of 12 checks | 2 of 2 passed, 12 of 12 checks |
| Text in images | 1 of 2 passed, 13 of 14 checks | 2 of 2 passed, 14 of 14 checks |
| Product photos | 2 of 2 passed, 12 of 12 checks | 2 of 2 passed, 12 of 12 checks |
| Photorealistic images | 1 of 2 passed, 10 of 11 checks | 2 of 2 passed, 11 of 11 checks |
| Illustrations | 2 of 2 passed, 10 of 10 checks | 2 of 2 passed, 10 of 10 checks |
| Portraits | 2 of 2 passed, 13 of 13 checks | 1 of 2 passed, 12 of 13 checks |
| YouTube thumbnails | 1 of 2 passed, 11 of 12 checks | 2 of 2 passed, 12 of 12 checks |
| Social media posts | 2 of 2 passed, 12 of 12 checks | 1 of 2 passed, 11 of 12 checks |
The same prompts, side by side
Nano Banana Pro's and Seedream 5.0 Lite's image for each prompt, with each question either one was answered no on; a prompt's title links to it in full, with every answer.
A coffee shop logo with its name
Both Nano Banana Pro and Seedream 5.0 Lite passed; Nano Banana Pro's image came 7.5 s sooner (38.6 s to 46.2 s), and Seedream 5.0 Lite's cost $0.063 less at kie.ai.
Nano Banana ProPassed 
Seedream 5.0 LitePassed 
A wheel and a wrench in one icon
Both Nano Banana Pro and Seedream 5.0 Lite passed; Nano Banana Pro's image came 5.0 s sooner (38.5 s to 43.4 s), and Seedream 5.0 Lite's cost $0.063 less at kie.ai.
Nano Banana ProPassed 
Seedream 5.0 LitePassed 
A bakery sign with two lines
Only Seedream 5.0 Lite passed, not Nano Banana Pro; Nano Banana Pro's image came 12.8 s sooner (31.0 s to 43.7 s), and Seedream 5.0 Lite's cost $0.063 less at kie.ai.
Nano Banana ProFailed 
- Is the writing on the sign in two lines, one above the other? No: The writing is in four lines (FRESH, BREAD, DAILY, OPEN 7AM), not two.
Seedream 5.0 LitePassed 
A café menu board with four prices
Both Nano Banana Pro and Seedream 5.0 Lite passed; Nano Banana Pro's image came 43.0 s sooner (31.6 s to 74.6 s), and Seedream 5.0 Lite's cost $0.063 less at kie.ai.
Nano Banana ProPassed 
Seedream 5.0 LitePassed 
A white sneaker on a grey background
Both Nano Banana Pro and Seedream 5.0 Lite passed; Seedream 5.0 Lite's image came 3.2 s sooner (41.2 s to 44.4 s), and Seedream 5.0 Lite's cost $0.063 less at kie.ai.
Nano Banana ProPassed 
Seedream 5.0 LitePassed 
A perfume bottle and its reflection
Both Nano Banana Pro and Seedream 5.0 Lite passed; Nano Banana Pro's image came 5.5 s sooner (36.4 s to 41.8 s), and Seedream 5.0 Lite's cost $0.063 less at kie.ai.
Nano Banana ProPassed 
Seedream 5.0 LitePassed 
A bowl of ramen from above
Both Nano Banana Pro and Seedream 5.0 Lite passed; Nano Banana Pro's image came 2.6 s sooner (44.1 s to 46.6 s), and Seedream 5.0 Lite's cost $0.063 less at kie.ai.
Nano Banana ProPassed 
Seedream 5.0 LitePassed 
A rainy street at night, one red umbrella
Only Seedream 5.0 Lite passed, not Nano Banana Pro; Nano Banana Pro's image came 5.9 s sooner (31.3 s to 37.2 s), and Seedream 5.0 Lite's cost $0.063 less at kie.ai.
Nano Banana ProFailed 
- Is it night? No: The sky is overcast and light, so it looks like daytime or dusk with neon signs lit, not full night.
Seedream 5.0 LitePassed 
A watercolour fox for a children's book
Both Nano Banana Pro and Seedream 5.0 Lite passed; Nano Banana Pro's image came 10.2 s sooner (47.3 s to 57.4 s), and Seedream 5.0 Lite's cost $0.063 less at kie.ai.
Nano Banana ProPassed 
Seedream 5.0 LitePassed 
Three people at one laptop, flat vector
Both Nano Banana Pro and Seedream 5.0 Lite passed; Nano Banana Pro's image came 7.7 s sooner (30.7 s to 38.4 s), and Seedream 5.0 Lite's cost $0.063 less at kie.ai.
Nano Banana ProPassed 
Seedream 5.0 LitePassed 
A studio headshot
Both Nano Banana Pro and Seedream 5.0 Lite passed; Nano Banana Pro's image came 12.6 s sooner (28.1 s to 40.7 s), and Seedream 5.0 Lite's cost $0.063 less at kie.ai.
Nano Banana ProPassed 
Seedream 5.0 LitePassed 
A fisherman holding a rope in both hands
Only Nano Banana Pro passed, not Seedream 5.0 Lite; Nano Banana Pro's image came 20.1 s sooner (33.4 s to 53.5 s), and Seedream 5.0 Lite's cost $0.063 less at kie.ai.
Nano Banana ProPassed 
Seedream 5.0 LiteFailed 
- Does every hand you can see have five fingers and look natural? No: The fingers are mostly hidden or wrapped around the rope, so five fingers on each hand cannot be confirmed.
A cooking video thumbnail
Both Nano Banana Pro and Seedream 5.0 Lite passed; Nano Banana Pro's image came 32.8 s sooner (28.3 s to 61.1 s), and Seedream 5.0 Lite's cost $0.063 less at kie.ai.
Nano Banana ProPassed 
Seedream 5.0 LitePassed 
A phone review thumbnail with a question
Only Seedream 5.0 Lite passed, not Nano Banana Pro; Nano Banana Pro's image came 10.1 s sooner (30.7 s to 40.7 s), and Seedream 5.0 Lite's cost $0.063 less at kie.ai.
Nano Banana ProFailed 
- Is there only one piece of writing? No: Besides the large "WORTH IT?", the phone screen shows several small labels such as HDR, 4K, VIDEO and PHOTO.
Seedream 5.0 LitePassed 
A summer sale post
Both Nano Banana Pro and Seedream 5.0 Lite passed; Nano Banana Pro's image came 2.4 s sooner (43.5 s to 45.9 s), and Seedream 5.0 Lite's cost $0.063 less at kie.ai.
Nano Banana ProPassed 
Seedream 5.0 LitePassed 
A book club announcement, top and bottom
Only Nano Banana Pro passed, not Seedream 5.0 Lite; Seedream 5.0 Lite's image came 2.1 s sooner (38.8 s to 40.8 s), and Seedream 5.0 Lite's cost $0.063 less at kie.ai.
Nano Banana ProPassed 
Seedream 5.0 LiteFailed 
- Apart from those two lines, is nothing else written? No: The book's pages show tiny, unreadable text-like marks, so the image contains more than those two lines.
More image models, compared
- FLUX.2 Pro vs Nano Banana Pro
- GPT Image 2.5 Flare vs Nano Banana Pro
- Ideogram 3.0 vs Nano Banana Pro
- Nano Banana 2 vs Nano Banana Pro
- Nano Banana Pro vs Qwen-Image 2.1
- FLUX.2 Pro vs Seedream 5.0 Lite
- GPT Image 2.5 Flare vs Seedream 5.0 Lite
- Ideogram 3.0 vs Seedream 5.0 Lite
- Nano Banana 2 vs Seedream 5.0 Lite
- Qwen-Image 2.1 vs Seedream 5.0 Lite
Questions
Is Nano Banana Pro better than Seedream 5.0 Lite?
On our 16 image test prompts, Seedream 5.0 Lite passed 14 and Nano Banana Pro 13, each image checked the same way. Nano Banana Pro was quicker, 36.2 s an image against 47.0 s. In llmwise a Nano Banana Pro image counts as 5 Claude Haiku 4.5 messages and a Seedream 5.0 Lite image as 2 Claude Haiku 4.5 messages: up to 50 and 125 images a month on Pro.
Which is cheaper in llmwise, Nano Banana Pro or Seedream 5.0 Lite?
Seedream 5.0 Lite: in llmwise its image counts as 2 Claude Haiku 4.5 messages, against 5 Claude Haiku 4.5 messages for Nano Banana Pro.
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