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Image models compared

FLUX.2 Pro vs GPT Image 2.5 Flare: the same prompts, side by side

Black Forest Labs' FLUX.2 Pro and OpenAI's GPT Image 2.5 Flare 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 passed 14 and GPT Image 2.5 Flare 13, each image checked the same way. FLUX.2 Pro was quicker, 60.7 s an image against 67.4 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 GPT Image 2.5 Flare in llmwise

What llmwise asks FLUX.2 Pro and GPT Image 2.5 Flare for, and what an image of each counts as.

FLUX.2 Pro and GPT Image 2.5 Flare in llmwise
FactFLUX.2 ProGPT Image 2.5 Flare
Made byBlack Forest LabsOpenAI
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 GPT Image 2.5 Flare 13 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 GPT Image 2.5 Flare, job by job
JobFLUX.2 ProGPT Image 2.5 Flare
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 checks1 of 2 passed, 12 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 GPT Image 2.5 Flare'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 GPT Image 2.5 Flare passed; GPT Image 2.5 Flare's image came 2.2 s sooner (58.9 s to 61.1 s), and FLUX.2 Pro's cost $0.005 less at kie.ai.

    FLUX.2 ProPassed
    FLUX.2 Pro's image for “A coffee shop logo with its name”
      GPT Image 2.5 FlarePassed
      GPT Image 2.5 Flare's image for “A coffee shop logo with its name”

      • A wheel and a wrench in one icon

        Both FLUX.2 Pro and GPT Image 2.5 Flare passed; FLUX.2 Pro's image came 7.5 s sooner (48.6 s to 56.1 s), and FLUX.2 Pro's cost $0.005 less at kie.ai.

        FLUX.2 ProPassed
        FLUX.2 Pro's image for “A wheel and a wrench in one icon”
          GPT Image 2.5 FlarePassed
          GPT Image 2.5 Flare's image for “A wheel and a wrench in one icon”

          • A bakery sign with two lines

            Both FLUX.2 Pro and GPT Image 2.5 Flare passed; FLUX.2 Pro's image came 40.8 s sooner (18.0 s to 58.8 s), and FLUX.2 Pro's cost $0.005 less at kie.ai.

            FLUX.2 ProPassed
            FLUX.2 Pro's image for “A bakery sign with two lines”
              GPT Image 2.5 FlarePassed
              GPT Image 2.5 Flare's image for “A bakery sign with two lines”

              • A café menu board with four prices

                Both FLUX.2 Pro and GPT Image 2.5 Flare passed; FLUX.2 Pro's image came 41.3 s sooner (18.2 s to 59.5 s), and FLUX.2 Pro's cost $0.005 less at kie.ai.

                FLUX.2 ProPassed
                FLUX.2 Pro's image for “A café menu board with four prices”
                  GPT Image 2.5 FlarePassed
                  GPT Image 2.5 Flare's image for “A café menu board with four prices”

                  • A white sneaker on a grey background

                    Both FLUX.2 Pro and GPT Image 2.5 Flare passed; FLUX.2 Pro's image came 33.9 s sooner (23.2 s to 57.0 s), and FLUX.2 Pro's cost $0.005 less at kie.ai.

                    FLUX.2 ProPassed
                    FLUX.2 Pro's image for “A white sneaker on a grey background”
                      GPT Image 2.5 FlarePassed
                      GPT Image 2.5 Flare's image for “A white sneaker on a grey background”

                      • A perfume bottle and its reflection

                        Both FLUX.2 Pro and GPT Image 2.5 Flare passed; FLUX.2 Pro's image came 38.4 s sooner (23.4 s to 61.8 s), and FLUX.2 Pro's cost $0.005 less at kie.ai.

                        FLUX.2 ProPassed
                        FLUX.2 Pro's image for “A perfume bottle and its reflection”
                          GPT Image 2.5 FlarePassed
                          GPT Image 2.5 Flare's image for “A perfume bottle and its reflection”

                          • A bowl of ramen from above

                            Both FLUX.2 Pro and GPT Image 2.5 Flare passed; FLUX.2 Pro's image came 49.5 s sooner (65.1 s to 114.6 s), and FLUX.2 Pro's cost $0.005 less at kie.ai.

                            FLUX.2 ProPassed
                            FLUX.2 Pro's image for “A bowl of ramen from above”
                              GPT Image 2.5 FlarePassed
                              GPT Image 2.5 Flare's image for “A bowl of ramen from above”

                              • A rainy street at night, one red umbrella

                                Both FLUX.2 Pro and GPT Image 2.5 Flare passed; FLUX.2 Pro's image came 47.1 s sooner (18.4 s to 65.4 s), and FLUX.2 Pro's cost $0.005 less at kie.ai.

                                FLUX.2 ProPassed
                                FLUX.2 Pro's image for “A rainy street at night, one red umbrella”
                                  GPT Image 2.5 FlarePassed
                                  GPT Image 2.5 Flare's image for “A rainy street at night, one red umbrella”

                                  • A watercolour fox for a children's book

                                    Both FLUX.2 Pro and GPT Image 2.5 Flare passed; GPT Image 2.5 Flare's image came 22.8 s sooner (67.6 s to 90.5 s), and FLUX.2 Pro's cost $0.005 less at kie.ai.

                                    FLUX.2 ProPassed
                                    FLUX.2 Pro's image for “A watercolour fox for a children's book”
                                      GPT Image 2.5 FlarePassed
                                      GPT Image 2.5 Flare's image for “A watercolour fox for a children's book”

                                      • Three people at one laptop, flat vector

                                        Both FLUX.2 Pro and GPT Image 2.5 Flare passed; GPT Image 2.5 Flare's image came 52.4 s sooner (67.2 s to 119.6 s), and FLUX.2 Pro's cost $0.005 less at kie.ai.

                                        FLUX.2 ProPassed
                                        FLUX.2 Pro's image for “Three people at one laptop, flat vector”
                                          GPT Image 2.5 FlarePassed
                                          GPT Image 2.5 Flare's image for “Three people at one laptop, flat vector”

                                          • A studio headshot

                                            Both FLUX.2 Pro and GPT Image 2.5 Flare passed; FLUX.2 Pro's image came 38.4 s sooner (20.4 s to 58.8 s), and FLUX.2 Pro's cost $0.005 less at kie.ai.

                                            FLUX.2 ProPassed
                                            FLUX.2 Pro's image for “A studio headshot”
                                              GPT Image 2.5 FlarePassed
                                              GPT Image 2.5 Flare's image for “A studio headshot”

                                              • A fisherman holding a rope in both hands

                                                Neither FLUX.2 Pro nor GPT Image 2.5 Flare passed; FLUX.2 Pro's image came 68.7 s sooner (30.7 s to 99.4 s), and FLUX.2 Pro's cost $0.005 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.
                                                GPT Image 2.5 FlareFailed
                                                GPT Image 2.5 Flare'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 partly hidden by the rope and jacket, so a clear count of five natural fingers on each hand isn't possible.

                                              • A cooking video thumbnail

                                                Both FLUX.2 Pro and GPT Image 2.5 Flare passed; FLUX.2 Pro's image came 5.2 s sooner (61.1 s to 66.3 s), and FLUX.2 Pro's cost $0.005 less at kie.ai.

                                                FLUX.2 ProPassed
                                                FLUX.2 Pro's image for “A cooking video thumbnail”
                                                  GPT Image 2.5 FlarePassed
                                                  GPT Image 2.5 Flare's image for “A cooking video thumbnail”

                                                  • A phone review thumbnail with a question

                                                    Only FLUX.2 Pro passed, not GPT Image 2.5 Flare; FLUX.2 Pro's image came 32.9 s sooner (23.0 s to 55.9 s), and FLUX.2 Pro's cost $0.005 less at kie.ai.

                                                    FLUX.2 ProPassed
                                                    FLUX.2 Pro's image for “A phone review thumbnail with a question”
                                                      GPT Image 2.5 FlareFailed
                                                      GPT Image 2.5 Flare's image for “A phone review thumbnail with a question”
                                                      • Is there only one piece of writing? No: The writing is on two separate lines, 'WORTH' and 'IT?', although they form one phrase.

                                                    • A summer sale post

                                                      Both FLUX.2 Pro and GPT Image 2.5 Flare passed; GPT Image 2.5 Flare's image came 115.9 s sooner (58.5 s to 174.4 s), and FLUX.2 Pro's cost $0.005 less at kie.ai.

                                                      FLUX.2 ProPassed
                                                      FLUX.2 Pro's image for “A summer sale post”
                                                        GPT Image 2.5 FlarePassed
                                                        GPT Image 2.5 Flare's image for “A summer sale post”

                                                        • A book club announcement, top and bottom

                                                          Neither FLUX.2 Pro nor GPT Image 2.5 Flare passed; GPT Image 2.5 Flare's image came 103.3 s sooner (72.9 s to 176.2 s), and FLUX.2 Pro's cost $0.005 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.
                                                          GPT Image 2.5 FlareFailed
                                                          GPT Image 2.5 Flare'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 of writing (BOOK and CLUB), not one, plus THURSDAY 7PM at the bottom.
                                                          • Apart from those two lines, is nothing else written? No: Besides the top and bottom text, the open book's pages have small print, though it is unreadable.

                                                        More image models, compared

                                                        Questions

                                                        Is FLUX.2 Pro better than GPT Image 2.5 Flare?

                                                        On our 16 image test prompts, FLUX.2 Pro passed 14 and GPT Image 2.5 Flare 13, each image checked the same way. FLUX.2 Pro was quicker, 60.7 s an image against 67.4 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 GPT Image 2.5 Flare?

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

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