The r1 is not just not-their-first, it's a pivot that reuses code from their earlier endeavours. (which itself is fine, like, that's what you'd expect from a pivot, it's just that their PR strategy relies on claiming those past projects are wholly unrelated.)
When they rug-pulled GAMA (after selling a bunch of NFTs), as consolation prize they "open sourced"[0] a few things.
One of their many promises was that their space-station "metaverse" would have "Quantum Engine AI Integration" (letting you talk to NPCs, among other things). They released a lightly edited Unreal Engine game template (the "metaverse"), along side a file named `api.yml`[1] which documents an AsyncAPI[2] API (the "AI integration"). There is no actual integration, the API spec is just positioned adjacent to the Unreal project - there's a note in the README that amounts to "integrate it yourself".
The back-end component was never open-sourced, and they've long since shut down the API server, but based on the docs, the API used by the r1 is clearly a direct evolution of that design.
As for the R1's API, there is no documentation, but I partially reverse-engineered it and wrote some docs of my own[3], which is enough to see the similarities.
[0] https://github.com/gamaspacestation/
[1] https://github.com/gamaspacestation/gss_release/blob/main/ap...
[2] https://www.asyncapi.com/
[3] https://gist.github.com/DavidBuchanan314/aafce6ba7fc49b19206...