After 100 rounds of continuous modifications to the same image in ByteDance's Seedream 5.5, no visible changes can be seen on the wrist, packaging text, and background. OpenAI's GPT Image 2.5 and 2.6 gradually blur into color blocks, or even change to another image. But this does not explain the overall level of the two's ability to change pictures. (Previous summary: ChatGPT Images 2.6 is here: new GIF animations & stored reference images, API price remains unchanged) (Background supplement: OpenAI launches ChatGPT Images 2.5! 50% faster generation speed, new hand-drawn sketches and precise local editing) ByteDance released the image model Seedream 5.5 on November 9, and someone tested it in the community that day: the same image was continuously slightly modified 100 times. times, the result is that Seedream 5.5 has almost remained unchanged, while OpenAI’s GPT Image 2.5 and 2.6 have become increasingly blurry with changes. The video below was posted on X by user Alisa Qian and has been viewed approximately 229,000 times as of November 11. Okay, Seedream 5.5's consistency is crazy!!!100 chained edits. Just +1 second on the watch each time. I didn't expect the gap to be this big. pic.twitter.com/7TFueQlsvX — Alisa Qian (@alisaqqt) November 9, 2026 The test was simple: a photo of a Casio G-Shock digital watch on the wrist, and each round only asked the model to add the seconds on the watch. 1. The output of the previous round is the input of the next round. Do this for 100 rounds. From the video, it can be seen that the seconds of the three models are all added up. The difference lies in other places besides the seconds: the wrist, the words on the snack packaging, and the wires in the background. Seedream 5.5 From round 0 to round 100, no changes can be seen in these places with the naked eye; the two GPTs are out of shape along the way. I thought GPT Image was already invincible, but I didn’t expect Seedream 5.5 to be even more surprising! This time I did an extreme editing test with Seedream 5.5 and GPT Image 2.5, which I just installed this week. Focus on the face, the change starts from the third second. The same photo of a person is edited continuously for 80 rounds to test the real image drift. Change hairstyles, glasses, clothes, drinks, and continue to change based on the generated pictures in each round. GPT… https://t.co/bvLDYsJf7Y pic.twitter.com/UPVypblzJs — Practice Brother Li (@MinLiBuilds) November 10, 2026 From which round did GPT start to lose shape? GPT Image 2.5 Around the 8th round, red lines began to appear on the skin of the arm; around the 14th round, the word "fruit corn kernels" on the package became a typo; by the 50th round, only the surface numbers on the whole picture were readable; at the 100th round, it turned into colorful blocks, and it was no longer possible to tell that it was a watch. ▲ Round 50: The Seedream 5.5 on the left can even see the words on the packaging, while the GPT Image 2.5 in the middle and the 2.6 on the right are only barely legible on the surface (screenshot from the video). GPT Image 2.6 is aliased in different ways. Starting from the 12th round, the color becomes more and more saturated, and then becomes a high-contrast color block; by around the 85th round, the entire picture is directly replaced by a clean G-Shock product photo, the wrist, snack bag, and background all disappear, the watch model is also changed, and the date becomes "SU 6-30". Only the time is still correct. Why does GPT become more confusing as it changes, but Seedream doesn’t? The principle is like "photocopying of photocopies": the output of the previous round becomes the input of the next round. Each time the model is redrawn, there will be a small error. As it accumulates round by round, the details will be lost. ByteDance’s official blog also explains this, saying that Seedream 5.5 relies on “targeted training” to retain areas that do not need to be changed at the pixel level without causing color shift. The same picture can be edited continuously for 100 rounds. On the OpenAI side, the development guide states that the mask of GPT Image operates entirely on prompt words. The model only uses the mask as a reference and does not necessarily adhere to the range accurately. To put it simply, even if you circle the areas that only need to be changed, the model may still move outside the range. Is it better to change the image on behalf of Seedream? You can't say that. This is a test of one person, one picture, and one modified method, and 100 rounds happens to be ByteDance’s main number, and the video was also posted on the day it was released. Some people in the reply area think it's unfair because Seedream seems to only touch the area to be changed, while GPT redraws the entire image. Some people say that when using GPT to modify an image, you can issue commands from the original image every time, so that distortion will not accumulate. What if I want to use it? Seedream 5.5 is gradually released in China through Doubao, Jimeng, and Volcano Engine Ark, and overseas it can be used through BytePlus’ Lumina. If the job is to revise the same picture repeatedly, such as changing the price of a product picture or changing the date of a poster, this ability is worth trying. If you use GPT to modify pictures, try to give instructions from the original picture every time, and do not take the last round of finished products and continue to modify them all the way. Related reports Google launches Nano Banana 2.1: The cost of image generation is cut in half, and the running scores are better than the previous generation. OpenAI introduces GPT-Image-2: Visual generation is ushered in crushing, designers will really lose their jobs this time. GPT-Image can finally be memorized, and transparent background materials can be directly used with one click. ByteDance Seedance 2.5 released: Upgraded 30-second video + 50 references, launched compliant copyright templates, first wave of cooperation with Stephen Chow Musk praised Seedance 2.0 "AI video is developing too fast"! ByteDance believes that the model is not perfect enough. "The most powerful image changer?" Seedream 5.5 remains unchanged after 100 consecutive changes, but GPT becomes more blurry with more changes. This article was first published in BlockTempo "DongZu DongTen - the most influential blockchain news media".