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Image models compared

FLUX.2 Pro vs Nano Banana 2: the same prompts, side by side

Black Forest Labs' FLUX.2 Pro and Google's Nano Banana 2 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, FLUX.2 Pro and Nano Banana 2 each passed 14, each image checked the same way. FLUX.2 Pro was quicker, 60.7 s an image against 88.0 s. In llmwise an image from either counts as 2 Claude Haiku 4.5 messages, up to 125 images a month on Pro.

FLUX.2 Pro and Nano Banana 2 in llmwise

What llmwise asks FLUX.2 Pro and Nano Banana 2 for, and what an image of each counts as.

FLUX.2 Pro and Nano Banana 2 in llmwise
FactFLUX.2 ProNano Banana 2
Made byBlack Forest LabsGoogle
Made throughkie.aikie.ai
Output size1K1K
Aspect ratiossquare 1:1, portrait 2:3, landscape 3:2square 1:1, portrait 2:3, landscape 3:2
An image counts as2 Claude Haiku 4.5 messages2 Claude Haiku 4.5 messages
Images on Proup to 125 a monthup to 125 a month

Job by job

FLUX.2 Pro passed 14 of 16 and Nano Banana 2 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.

FLUX.2 Pro and Nano Banana 2, job by job
JobFLUX.2 ProNano Banana 2
Logos2 of 2 passed, 12 of 12 checks2 of 2 passed, 12 of 12 checks
Text in images2 of 2 passed, 14 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 images2 of 2 passed, 11 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
Portraits1 of 2 passed, 12 of 13 checks2 of 2 passed, 13 of 13 checks
YouTube thumbnails2 of 2 passed, 12 of 12 checks1 of 2 passed, 11 of 12 checks
Social media posts1 of 2 passed, 11 of 12 checks1 of 2 passed, 10 of 12 checks

The same prompts, side by side

FLUX.2 Pro's and Nano Banana 2'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 FLUX.2 Pro and Nano Banana 2 passed; Nano Banana 2's image came 12.5 s sooner (48.6 s to 61.1 s), and FLUX.2 Pro's cost $0.015 less at kie.ai.

    FLUX.2 ProPassed
    FLUX.2 Pro's image for “A coffee shop logo with its name”
      Nano Banana 2Passed
      Nano Banana 2's image for “A coffee shop logo with its name”

      • A wheel and a wrench in one icon

        Both FLUX.2 Pro and Nano Banana 2 passed; FLUX.2 Pro's image came 70.8 s sooner (48.6 s to 119.5 s), and FLUX.2 Pro's cost $0.015 less at kie.ai.

        FLUX.2 ProPassed
        FLUX.2 Pro's image for “A wheel and a wrench in one icon”
          Nano Banana 2Passed
          Nano Banana 2's image for “A wheel and a wrench in one icon”

          • A bakery sign with two lines

            Both FLUX.2 Pro and Nano Banana 2 passed; FLUX.2 Pro's image came 30.6 s sooner (18.0 s to 48.6 s), and FLUX.2 Pro's cost $0.015 less at kie.ai.

            FLUX.2 ProPassed
            FLUX.2 Pro's image for “A bakery sign with two lines”
              Nano Banana 2Passed
              Nano Banana 2's image for “A bakery sign with two lines”

              • A café menu board with four prices

                Both FLUX.2 Pro and Nano Banana 2 passed; FLUX.2 Pro's image came 25.9 s sooner (18.2 s to 44.1 s), and FLUX.2 Pro's cost $0.015 less at kie.ai.

                FLUX.2 ProPassed
                FLUX.2 Pro's image for “A café menu board with four prices”
                  Nano Banana 2Passed
                  Nano Banana 2's image for “A café menu board with four prices”

                  • A white sneaker on a grey background

                    Both FLUX.2 Pro and Nano Banana 2 passed; FLUX.2 Pro's image came 20.6 s sooner (23.2 s to 43.8 s), and FLUX.2 Pro's cost $0.015 less at kie.ai.

                    FLUX.2 ProPassed
                    FLUX.2 Pro's image for “A white sneaker on a grey background”
                      Nano Banana 2Passed
                      Nano Banana 2's image for “A white sneaker on a grey background”

                      • A perfume bottle and its reflection

                        Both FLUX.2 Pro and Nano Banana 2 passed; FLUX.2 Pro's image came 21.2 s sooner (23.4 s to 44.6 s), and FLUX.2 Pro's cost $0.015 less at kie.ai.

                        FLUX.2 ProPassed
                        FLUX.2 Pro's image for “A perfume bottle and its reflection”
                          Nano Banana 2Passed
                          Nano Banana 2's image for “A perfume bottle and its reflection”

                          • A bowl of ramen from above

                            Both FLUX.2 Pro and Nano Banana 2 passed; FLUX.2 Pro's image came 88.0 s sooner (65.1 s to 153.1 s), and FLUX.2 Pro's cost $0.015 less at kie.ai.

                            FLUX.2 ProPassed
                            FLUX.2 Pro's image for “A bowl of ramen from above”
                              Nano Banana 2Passed
                              Nano Banana 2's image for “A bowl of ramen from above”

                              • A rainy street at night, one red umbrella

                                Both FLUX.2 Pro and Nano Banana 2 passed; FLUX.2 Pro's image came 125.8 s sooner (18.4 s to 144.1 s), and FLUX.2 Pro's cost $0.015 less at kie.ai.

                                FLUX.2 ProPassed
                                FLUX.2 Pro's image for “A rainy street at night, one red umbrella”
                                  Nano Banana 2Passed
                                  Nano Banana 2's image for “A rainy street at night, one red umbrella”

                                  • A watercolour fox for a children's book

                                    Both FLUX.2 Pro and Nano Banana 2 passed; Nano Banana 2's image came 43.3 s sooner (47.2 s to 90.5 s), and FLUX.2 Pro's cost $0.015 less at kie.ai.

                                    FLUX.2 ProPassed
                                    FLUX.2 Pro's image for “A watercolour fox for a children's book”
                                      Nano Banana 2Passed
                                      Nano Banana 2's image for “A watercolour fox for a children's book”

                                      • Three people at one laptop, flat vector

                                        Both FLUX.2 Pro and Nano Banana 2 passed; FLUX.2 Pro's image came 64.0 s sooner (119.6 s to 183.6 s), and FLUX.2 Pro's cost $0.015 less at kie.ai.

                                        FLUX.2 ProPassed
                                        FLUX.2 Pro's image for “Three people at one laptop, flat vector”
                                          Nano Banana 2Passed
                                          Nano Banana 2's image for “Three people at one laptop, flat vector”

                                          • A studio headshot

                                            Both FLUX.2 Pro and Nano Banana 2 passed; FLUX.2 Pro's image came 46.0 s sooner (20.4 s to 66.5 s), and FLUX.2 Pro's cost $0.015 less at kie.ai.

                                            FLUX.2 ProPassed
                                            FLUX.2 Pro's image for “A studio headshot”
                                              Nano Banana 2Passed
                                              Nano Banana 2's image for “A studio headshot”

                                              • A fisherman holding a rope in both hands

                                                Only Nano Banana 2 passed, not FLUX.2 Pro; FLUX.2 Pro's image came 86.5 s sooner (30.7 s to 117.2 s), and FLUX.2 Pro's cost $0.015 less at kie.ai.

                                                FLUX.2 ProFailed
                                                FLUX.2 Pro'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 hands are clasped and partly hidden by the rope, so the fingers are hard to count and some look slightly merged or unclear.
                                                Nano Banana 2Passed
                                                Nano Banana 2's image for “A fisherman holding a rope in both hands”

                                                • A cooking video thumbnail

                                                  Both FLUX.2 Pro and Nano Banana 2 passed; Nano Banana 2's image came 45.6 s sooner (15.5 s to 61.1 s), and FLUX.2 Pro's cost $0.015 less at kie.ai.

                                                  FLUX.2 ProPassed
                                                  FLUX.2 Pro's image for “A cooking video thumbnail”
                                                    Nano Banana 2Passed
                                                    Nano Banana 2's image for “A cooking video thumbnail”

                                                    • A phone review thumbnail with a question

                                                      Only FLUX.2 Pro passed, not Nano Banana 2; FLUX.2 Pro's image came 166.4 s sooner (23.0 s to 189.4 s), and FLUX.2 Pro's cost $0.015 less at kie.ai.

                                                      FLUX.2 ProPassed
                                                      FLUX.2 Pro's image for “A phone review thumbnail with a question”
                                                        Nano Banana 2Failed
                                                        Nano Banana 2's image for “A phone review thumbnail with a question”
                                                        • Is there only one piece of writing? No: Besides the large 'WORTH IT?' text, there are small app labels on the phone screen such as YouTube, Foto, Settings and Camera.

                                                      • A summer sale post

                                                        Both FLUX.2 Pro and Nano Banana 2 passed; Nano Banana 2's image came 118.3 s sooner (56.0 s to 174.4 s), and FLUX.2 Pro's cost $0.015 less at kie.ai.

                                                        FLUX.2 ProPassed
                                                        FLUX.2 Pro's image for “A summer sale post”
                                                          Nano Banana 2Passed
                                                          Nano Banana 2's image for “A summer sale post”

                                                          • A book club announcement, top and bottom

                                                            Neither FLUX.2 Pro nor Nano Banana 2 passed; Nano Banana 2's image came 90.8 s sooner (85.5 s to 176.2 s), and FLUX.2 Pro's cost $0.015 less at kie.ai.

                                                            FLUX.2 ProFailed
                                                            FLUX.2 Pro's image for “A book club announcement, top and bottom”
                                                            • Apart from those two lines, is nothing else written? No: The book's pages contain small lines of text and page numbers, so other writing appears in the image, though it is illegible.
                                                            Nano Banana 2Failed
                                                            Nano Banana 2's image for “A book club announcement, top and bottom”
                                                            • Is there one line of writing at the top and one at the bottom? No: The top has two lines, 'BOOK' and 'CLUB', not one, and the bottom has one line, 'THURSDAY 7PM'.
                                                            • Apart from those two lines, is nothing else written? No: The book pages have tiny text and the tea bag tag has small writing, so there is more writing than the headline and the bottom line.

                                                          More image models, compared

                                                          Questions

                                                          Is FLUX.2 Pro better than Nano Banana 2?

                                                          On our 16 image test prompts, FLUX.2 Pro and Nano Banana 2 each passed 14, each image checked the same way. FLUX.2 Pro was quicker, 60.7 s an image against 88.0 s. In llmwise an image from either counts as 2 Claude Haiku 4.5 messages, up to 125 images a month on Pro.

                                                          Which is cheaper in llmwise, FLUX.2 Pro or Nano Banana 2?

                                                          Neither: in llmwise an image from either counts as 2 Claude Haiku 4.5 messages.

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