o3-deep-research troubleshooting

[josegtmonteiro]

Hello,

I'm trying to use OpenAI o3-deep-research model. However, even with FileSearch, WebSearch and MCP tools selected, I get always the message:
"Something went wrong. Here's the specific error message we encountered: An error occurred while processing the request: 400 Deep research models only support the 'web_search_preview', 'code_interpreter', 'mcp', and 'file_search' tools."

Nothing gets added to the error logs, nothing related on the debug logs and on the main container logs I see only the message below, but I see it is failing on the conversation title, not the main conversation.

2025-08-22 16:15:50 error: [api/server/controllers/agents/client.js #titleConvo] Error 404 This model is only supported in v1/responses and not in v1/chat/completions.

Troubleshooting URL: https://js.langchain.com/docs/troubleshooting/errors/MODEL_NOT_FOUND/

Am I doing anything wrong? Or is it a bug or enhancement needed to support o3-deep-research?

[josegtmonteiro]

Same happens with o4-mini-deep-research

[danny-avila]

You can't enable MCP servers or tools with deep research models, besides OAI native tools, which we currently only support the web search tool.

[josegtmonteiro]

Ah, ok! Thanks for the quick reply. I can confirm that with only WebSearch it works well.

Is it in the plans to get it working with MCP?