gemini-3.1-flash-image-preview occasional black blocks and image blurring

[hnsywangxin]

when use gemini-3.1-flash-image-preview api, I can get black block image and blurring image.

I activated thinking mode to locate it. In thinking mode, the final graph actually looks worse than the one in the thought process
thinking final image:

thought process image :

Looking forward to your reply. Thank you

[Venkaiahbabuneelam]

Hey @hnsywangxin, thanks for reaching out us!

The gemini-3.1-flash-image-preview model has been officially deprecated, we recommend using gemini-3.1-flash-image as its replacement.

Thanks