How to get GPT-OSS-20B to work like the other models?

[MikeNatC]

I am now to LocalAI and am a novice at running LLMs locally.

I have just started trying out LocalAI. However, when I run the GPT-OSS-20B model using the llama.cpp backend, I get outputs that show the Harmony tags like <|channel|>analysis<|message|>.

For example, when I send this query: Hi, what's your name? I get the following response:

<|channel|>analysis<|message|>We need to respond: friendly, helpful. The user asks "Hi, what's your name?" We can say "I'm ChatGPT".<|end|><|start|>assistant<|channel|>final<|message|>Hi! I’m ChatGPT – your AI assistant. How can I help you today?

I am not sure what to do as this is not a problem for the other models.

Any help or advice is much appreciated!