Assemble

We release a technical report introducing ASSEMBLE, an atomic-skill framework for evidence-grounded long-video reasoning. With a 9B reader supervised by a 235B teacher, ASSEMBLE reaches 59.2 percent macro-averaged answer accuracy across three benchmarks, compared with 58.3 percent for Gemini-2.5-Pro, and improves overlap-based Grounded accuracy by 6.7 percent.