Is Deep Research Still Good for Research?

ProposalOrganic1043 · reddit · 2026-07-14

The author questions whether OpenAI's Deep Research is still worth using for tasks that require high intelligence and heavy searching.

They noted that while o3-deep-research and o4-mini-deep-research are still visible in the API docs, it's unclear what underlying base model is currently running under the hood. The author is also debating whether to simply switch to work mode and use a more powerful model (mentioning Sol at Ultra), because while Deep Research sometimes finds the right sources, its output quality seems bottlenecked by the model's intelligence ceiling.

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