On December 5, 2025, Kling AI made an exciting announcement regarding its flagship product, Kling O1. The product has now officially rolled out two significant features: the 'Subject Library' and the 'Comparison Template'.

The 'Subject Library' is a game - changer. It offers the convenience of one - click reuse and the flexibility of free combination. When it comes to video generation, it allows for the association of up to 7 subjects. In the realm of image generation, this number expands to 10 subjects. Moreover, it is further enhanced by AI image completion technology, ensuring a seamless and comprehensive creative experience.

The 'Comparison Template' feature is equally impressive. It empowers users to conduct a side - by - side comparison between the input materials and the generated results. This provides a highly intuitive way to showcase and evaluate creative outcomes, making the creative process more transparent and efficient.