https://seed.bytedance.com/en/seedream4_0

https://flux1.ai/seedream-4

https://wavespeed.ai/

➤ Super‑fast, high‑resolution results : resolutions up to 4K, producing a 2K image in less than 1.8 seconds, all while maintining sharpness and realism.

➤ At 4K, cost as low as 0.03 $ per generation.

➤ Natural‑language editing – You can instruct the model to “remove the people in the background,” “add a helmet” or “replace this with that,” and it executes without needing complicated prompts.

➤ Multi‑image input and output – It can combine multiple images, transfer styles and produce storyboards or series with consistent characters and themes.