OpenAI: o3 Deep ResearchModel23/100 via “source-aware synthesis with citation tracking”
o3-deep-research is OpenAI's advanced model for deep research, designed to tackle complex, multi-step research tasks.
Note: This model always uses the 'web_search' tool which adds additional cost.
Unique: Maintains source provenance throughout the reasoning and synthesis process, allowing the model to reference specific URLs and publication metadata in final output, rather than generating citations post-hoc or requiring separate citation lookup
vs others: Produces better-attributed research output than standard LLMs because it integrates source tracking into the search-and-reason loop, and exceeds simple RAG systems by synthesizing across multiple sources while maintaining clear attribution chains