Seedream 5.5, edited watch photos 100 times… differences from GPT 2.5 and 2.6

ByteDance released its Seedream 5.5 image generation and editing model on the 9th, claiming improved stability in sequential edits, transparent background generation, and better rendering of textures and small text. In a user test involving 100 consecutive edits to a wristwatch photo—changing only the seconds display by one second each time—Seedream preserved surrounding elements while GPT Image 2.5 and 2.6 blurred some details or shifted the composition. ByteDance's official demo chained edits to a portrait's clothing, accessories, and tabletop objects, feeding each output into the next edit, and the company said details such as rings and glasses frames remained intact after the 100th revision. The comparison matters because multi-step editing consistency is a key battleground among image models, and the test suggests Seedream may hold up better than OpenAI's GPT Image iterations over long edit chains. Next, watch for independent benchmarks of Seedream 5.5's sequential-edit stability and transparent-background output, and whether OpenAI responds with a GPT Image update.