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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.

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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.

Nano Banana Pro and Seedream 5.0 Lite in llmwise
FactNano Banana ProSeedream 5.0 Lite
Made byGoogleByteDance
Made throughkie.aikie.ai
Output size2K2K
Aspect ratiossquare 1:1, portrait 2:3, landscape 3:2square 1:1, portrait 2:3, landscape 3:2
An image counts as5 Claude Haiku 4.5 messages2 Claude Haiku 4.5 messages
Images on Proup to 50 a monthup 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.

Nano Banana Pro and Seedream 5.0 Lite, job by job
JobNano Banana ProSeedream 5.0 Lite
Logos2 of 2 passed, 12 of 12 checks2 of 2 passed, 12 of 12 checks
Text in images1 of 2 passed, 13 of 14 checks2 of 2 passed, 14 of 14 checks
Product photos2 of 2 passed, 12 of 12 checks2 of 2 passed, 12 of 12 checks
Photorealistic images1 of 2 passed, 10 of 11 checks2 of 2 passed, 11 of 11 checks
Illustrations2 of 2 passed, 10 of 10 checks2 of 2 passed, 10 of 10 checks
Portraits2 of 2 passed, 13 of 13 checks1 of 2 passed, 12 of 13 checks
YouTube thumbnails1 of 2 passed, 11 of 12 checks2 of 2 passed, 12 of 12 checks
Social media posts2 of 2 passed, 12 of 12 checks1 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.

  1. 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
    Nano Banana Pro's image for “A coffee shop logo with its name”
      Seedream 5.0 LitePassed
      Seedream 5.0 Lite's image for “A coffee shop logo with its name”

      • 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
        Nano Banana Pro's image for “A wheel and a wrench in one icon”
          Seedream 5.0 LitePassed
          Seedream 5.0 Lite's image for “A wheel and a wrench in one icon”

          • 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
            Nano Banana Pro's image for “A bakery sign with two lines”
            • 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
            Seedream 5.0 Lite's image for “A bakery sign with two lines”

            • 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
              Nano Banana Pro's image for “A café menu board with four prices”
                Seedream 5.0 LitePassed
                Seedream 5.0 Lite's image for “A café menu board with four prices”

                • 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
                  Nano Banana Pro's image for “A white sneaker on a grey background”
                    Seedream 5.0 LitePassed
                    Seedream 5.0 Lite's image for “A white sneaker on a grey background”

                    • 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
                      Nano Banana Pro's image for “A perfume bottle and its reflection”
                        Seedream 5.0 LitePassed
                        Seedream 5.0 Lite's image for “A perfume bottle and its reflection”

                        • 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
                          Nano Banana Pro's image for “A bowl of ramen from above”
                            Seedream 5.0 LitePassed
                            Seedream 5.0 Lite's image for “A bowl of ramen from above”

                            • 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
                              Nano Banana Pro's image for “A rainy street at night, one red umbrella”
                              • 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
                              Seedream 5.0 Lite's image for “A rainy street at night, one red umbrella”

                              • 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
                                Nano Banana Pro's image for “A watercolour fox for a children's book”
                                  Seedream 5.0 LitePassed
                                  Seedream 5.0 Lite's image for “A watercolour fox for a children's book”

                                  • 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
                                    Nano Banana Pro's image for “Three people at one laptop, flat vector”
                                      Seedream 5.0 LitePassed
                                      Seedream 5.0 Lite's image for “Three people at one laptop, flat vector”

                                      • 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
                                        Nano Banana Pro's image for “A studio headshot”
                                          Seedream 5.0 LitePassed
                                          Seedream 5.0 Lite's image for “A studio headshot”

                                          • 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
                                            Nano Banana Pro's image for “A fisherman holding a rope in both hands”
                                              Seedream 5.0 LiteFailed
                                              Seedream 5.0 Lite's image for “A fisherman holding a rope in both hands”
                                              • 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
                                              Nano Banana Pro's image for “A cooking video thumbnail”
                                                Seedream 5.0 LitePassed
                                                Seedream 5.0 Lite's image for “A cooking video thumbnail”

                                                • 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
                                                  Nano Banana Pro's image for “A phone review thumbnail with a question”
                                                  • 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
                                                  Seedream 5.0 Lite's image for “A phone review thumbnail with a question”

                                                  • 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
                                                    Nano Banana Pro's image for “A summer sale post”
                                                      Seedream 5.0 LitePassed
                                                      Seedream 5.0 Lite's image for “A summer sale post”

                                                      • 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
                                                        Nano Banana Pro's image for “A book club announcement, top and bottom”
                                                          Seedream 5.0 LiteFailed
                                                          Seedream 5.0 Lite's image for “A book club announcement, top and bottom”
                                                          • 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

                                                        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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