In the case of the GPT-OSS models, the worst (time consuming) part of supporting it is the new format they've trained the model with, "OpenAI harmony", in my ow

In the case of the GPT-OSS models, the worst (time consuming) part of supporting it is the new format they've trained the model with, "OpenAI harmony", in my own clients I couldn't just replace the model and call it a day, but still working on getting then to work correctly with tool calling...