There's plenty of retrieval-based models that do cite sources. They just didn't want to deal with it for this release.[1] I'm sure it's already on the roadmap.
[1] In fact, some snooping suggests they specifically disabled that feature, but do have it in test environments. See the "browsing disabled" flag they have in the hidden prompt. That could easily be used for citations. Source: (https://twitter.com/goodside/status/1598253337400717313)
[1] In fact, some snooping suggests they specifically disabled that feature, but do have it in test environments. See the "browsing disabled" flag they have in the hidden prompt. That could easily be used for citations. Source: (https://twitter.com/goodside/status/1598253337400717313)