OpenAI's terms of use by contrast: "As between you and OpenAI, and to the extent permitted by applicable law, you (a) retain your ownership rights in Input and (b) own the Output. We hereby assign to you all our right, title, and interest, if any, in and to Output."

Similar, except without the implied conditional reversion.

(Pre-empting the "yeah but there is no copyright in AI model output" objection: maybe not in the US, but other places also exist.)