Reality Composer Pro Assistant currently appears limited to a fixed OpenAI model list and the legacy /v1/chat/completions endpoint.
On Reality Composer Pro 3.0 (75.0.14.500.1), the OpenAI provider exposes only a small set of models such as gpt-4.1, gpt-4o, gpt-4o-mini, o1, and o3-mini. Newer models available through OpenAI’s current APIs are not usable.
It would be nice to add support for current provider APIs, including OpenAI’s /v1/responses endpoint, and allow dynamic model discovery or manual custom model IDs.
Feedback ticket: FB23274502