Dassault Falcon 6x vs Gulfstream G400 vs Gulfstream G500

The Dassault Falcon 6X, Gulfstream G400, and Gulfstream G500 are all large-cabin business jets, but they span slightly different missions. The Falcon 6X sits firmly in the ultra‑long‑range, large‑cabin category, emphasizing cabin comfort and long legs; it is typically quoted around 5,500 nautical miles of range and commonly carries about 12–16 passengers depending on layout. The Gulfstream G400 is positioned as a long‑range, large‑cabin jet below the G500, aimed at transoceanic missions with somewhat less reach; it is generally advertised around 4,200 nautical miles and usually seats roughly 10–12 passengers in typical configurations. The Gulfstream G500 moves up into the ultra‑long‑range, large‑cabin class, with a higher performance envelope and more range than the G400; it is commonly published around 5,300 nautical miles and typically accommodates about 12–16 passengers. In short, G400 prioritizes long‑range efficiency below the top tier, while Falcon 6X and G500 compete more directly as ultra‑long‑range large‑cabin aircraft with similar passenger capacity but different cabin and performance emphases.