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7mo ago

ByteDance Launches Seedream 4.0 to Challenge Google DeepMind’s ‘Nano Banana’

ByteDance says its new model tops Gemini 2.5 Flash Image on internal tests, though it has not published a technical report for independent review.

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Nano banana produced this image with the prompt, ‘Turn the Star Ferry into a spacecraft traversing a wormhole in space’. Photo: Nano Banana
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Overview

  • Seedream 4.0 unifies ByteDance’s text-to-image (Seedream 3.0) and image-editing (SeedEdit 3.0) tools into a single model.
  • ByteDance claims superior performance over Gemini 2.5 Flash Image on its in-house MagicBench, citing gains in prompt adherence, alignment and aesthetics.
  • The company has not released a technical paper to substantiate those benchmark results, leaving third-party validation outstanding.
  • Artificial Analysis described Seedream 4.0 as a significant evolution compared with ByteDance’s previous image models.
  • The model is listed at US$30 per 1,000 generations, as ByteDance positions it as a direct competitor to Google’s widely praised late-August release.