1. System messages are not supported in old O1 family

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System messages are not supported in the old O1 family

You can read more about the OpenAI message format in the OpenAI documentation. Essentially, in older reasoning models of the o1 family, such as o1-preview or o1-mini, system messages are not supported. Instead, you need to use <user> or <assistant> messages. Latitude replaces system messages with user messages. You can always wrap text with <assistant> tags to generate assistant messages.
The official “o1” model works fine.
---
provider: OpenAI
model: o1-preview
---

This is a system message that will be replaced by "<user>" messages.

<assistant>This is an assistant message</assistant>