Gemini 3 and ChatGPT 5.2 are increasingly judged not by the brilliance of a single answer, but by how well they sustain understanding across long conversations, mixed inputs, and repeated professional workflows that unfold over hours or days rather than minutes. In this comparison, the focus is cognitive continuity , meaning how each system handles multimodal inputs, preserves intent as context grows, and manages memory-like behavior as tasks evolve. ····· Multimodality only