Thanks — good question. The OpenAI plugin direct call can use either, depending on which client class is used: • If the plugin uses

openai.responses.LLM()

it uses the Responses API (recommended for direct OpenAI usage). • If it uses

openai.LLM()

it uses the Chat Completions API (chat-completions format, used for OpenAI-compatible providers and legacy code). Which integration are you using (direct OpenAI vs. an OpenAI-compatible provider) or which class do you see in your code? I can guide next steps based on that. Sources: OpenAI LLM models | LiveKit Documentation, with interactive elements