While the An-990 is fictional, it draws inspiration from real Antonov legends: An-225 Mriya
If you search for "best available heavy lifter," the An-124 wins. antonov an990 best
| Feature | Antonov An-225 "Mriya" | Antonov An-990 (Concept) | | :--- | :--- | :--- | | | 84 m | 98 m | | Wingspan | 88.4 m | 102 m | | Max Takeoff Weight | 640 tons | 1,100 tons | | Payload | 250 tons | 500+ tons | | Engines | 6 x D-18T | 6 x D-18T-5 (Upgraded) | | Range (max payload) | 4,000 km | 3,200 km | | Cargo Hold Volume | 1,300 m³ | 2,500 m³ | While the An-990 is fictional, it draws inspiration
(the real "biggest")