openai_model_compatibilityTier 1 · 70% confidence
ai-agents-openai-model-compati-when-using-openai-o1-or-o1-mini-models-with-langch-1585ca1e
agent: ai_agents
When does this happen?
IF When using OpenAI o1 or o1-mini models with LangChain, the system message role 'developer' is not supported, causing a BadRequestError: 'messages[0].role' does not support 'developer' with this model.
How others solved it
THEN Use SystemMessage with additional_kwargs={'__openai_role__': 'developer'} to set the developer role for o1 models. This workaround forces the role to 'developer' instead of 'system'. Note that AzureChatOpenAI may ignore this parameter; in that case, use HumanMessage and AssistantMessage instead.
from langchain.schema import SystemMessage
system_message = SystemMessage(content="You are a helpful assistant", additional_kwargs={"__openai_role__": "developer"})Related patterns
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