  The virtuosity of language models like GPT-3 opens a new world of possibility
for human-AI collaboration in writing. In this paper, we present a framework in
which generative language models are conceptualized as multiverse generators.
This framework also applies to human imagination and is core to how we read and
write fiction. We call for exploration into this commonality through new forms
of interfaces which allow humans to couple their imagination to AI to write,
explore, and understand non-linear fiction. We discuss the early insights we
have gained from actively pursuing this approach by developing and testing a
novel multiversal GPT-3-assisted writing interface.
