Would be really surprised if this is in any way affiliated with Twitter but never know now a days.
Discussion
URL for the image is x.ai
It's using the grok API.
I'm pretty sure it's created by nostr:nprofile1qqsx8x8ptc6pdhsf8wtregu8s0f2v65k2l9s3ja6fup9gmxa2km0rfqpzemhxue69uhhyetvv9ujuurjd9kkzmpwdejhgqgkwaehxw309aex2mrp0yhxummnw3ezucnpdejqz9rhwden5te0wfjkccte9ejxzmt4wvhxjmcz7q7wm