The monopoly superpowers have had on building the most advanced fighter jets looks to be ending with South Korea's KF-21 ...

Uncover the stealthiest fighter jets in 2025 - who dominates the skies, and how new threats are shaping the next generation.

Lockheed Martin is pivoting to upgrade the F-35 after losing major sixth-generation fighter jet contracts. It promises near-NGAD capabilities at half the cost.

Consequently, KAI and analysts often refer to the KF-21 as a "4.5 generation" fighter — in other words, an advanced 4th-gen fighter with some 5th-gen characteristics. But that may not be the ...