>>Uehrek+(OP)
One obstacle I see here would be the vocal comparisons posted so far.[1][2][3] A majority of the commentators seem to think that the voices do not sound especially similar. If OpenAI can further prove their claim that Sky's voice belongs to a "professional actress using her own natural speaking voice" and that they "cast the voice actor behind Sky's voice before any outreach to Ms. Johansson," I'm not sure a potential implied association of Altman's tweet would provide a strong case.
[1] https://old.reddit.com/r/singularity/comments/1cx24sy/vocal_...
[2] https://old.reddit.com/r/ChatGPT/comments/1cwy6wz/vocal_comp...
[3] https://old.reddit.com/r/ChatGPT/comments/1cx9t8b/vocal_comp...