TikTok parent Bytedance launches new AI tool Seedream 4.0 to rival Google’s Nano Banana

TikTok’s parent company, ByteDance, has reportedly launched its new image generation tool, Seedream 4.0. The company claims that it outperforms Google DeepMind’s popular Gemini 2.5 Flash Image (also known as “Nano Banana”). The company’s Seed department stated that Seedream 4.0 boasts strong image editing capabilities, positioning it in direct competition with Google’s tool, which has garnered widespread acclaim for its consistent and accurate image editing. ByteDance claims that Seedream 4.0 beat Gemini 2.5 Flash Image on its internal evaluation benchmark, MagicBench, with better performance in prompt adherence, alignment, and aesthetics. However, the company has not published these results in an official technical report.