VERDICT: MISLEADING **What the claim is about:** The viral caption doesn't name an aircraft, but "the largest aircraft in the history of the world" is conventionally applied to the **Antonov An-225 Mriya**, the six-engine Soviet/Ukrainian heavy-lift jet. I checked that aircraft against authoritative records. The claim is *partly* true and *partly* false in a way that makes the sweeping, unqualified wording misleading. **Claim-linked findings** **Finding 1 — The "largest / never repeated" core is supported for the An-225.** The Smithsonian National Air and Space Museum's *How Things Fly* says: "The generally acclaimed 'biggest aircraft' is the Antonov An-225 Mriya, which can carry the space shuttle on its back." ([howthingsfly.si.edu](https://howthingsfly.si.edu/ask-an-explainer/what-biggest-aircraft-world)). The U.S. Air Force's Air University (Wild Blue Yonder, 19 Dec 2024) states: "To date, the Antonov An-225 Mriya is the aircraft that surpassed all in the weight category," citing its record MTOW and 32-wheel main gear ([airuniversity.af.edu](https://www.airuniversity.af.edu/Wild-Blue-Yonder/Articles/Article-Display/Article/4008623/bearing-the-weight-of-giants/)). National Defense University Press (*Joint Force Quarterly 115*) captions its photo "Antonov An-225 Mriya, world's largest cargo plane" ([ndupress.ndu.edu](https://ndupress.ndu.edu/Media/News/News-Article-View/Article/4285798/from-sparta-to-hostomel-the-enduring-role-of-joint-forcible-entry-operations/)). Only one An-225 was ever completed, and its design/weight class has never been duplicated — so "never matched or repeated" holds for the *heaviest-ever* record and for the one-off airframe. **Finding 2 — "Largest aircraft … never matched" is false as an unqualified statement, because "largest" is metric-dependent.** Guinness World Records splits the title. Its record "**Largest aircraft by weight (ever)**" credits the An-225 at **640 tonnes** MTOW with a wingspan of 88.4 m ([guinnessworldrecords.com](https://www.guinnessworldrecords.com/world-records/largest-aircraft-by-weight-(present-day))). But its separate record "**Largest aircraft by wingspan**" credits the **Scaled Composites Model 351 Stratolaunch ("Roc")** — a currently flying aircraft — at **117.35 m (385 ft)**, first flown 13 April 2019 ([guinnessworldrecords.com](https://www.guinnessworldrecords.com/world-records/largest-aircraft-by-wingspan)). The Roc's span is dramatically wider than the An-225's 88.4 m (and the 1947 Hughes H-4 "Spruce Goose" also spanned more, ~97.5 m). So in the plain "biggest/spread" sense, the largest aircraft **has** been matched and exceeded — the opposite of "never matched to this day." **Bottom line:** The claim is accurate if "largest" is loosely restricted to *heaviest* (the An-225 remains the undisputed heaviest aircraft ever built, and no second airframe ever flew). But as written it presents a single unqualified "largest aircraft in history" that "has never been matched or repeated," which is misleading: the widest aircraft ever flown is the Stratolaunch Roc, and no aircraft is "the largest" by every measure. Verdict: MISLEADING. Sources opened and cited: - https://howthingsfly.si.edu/ask-an-explainer/what-biggest-aircraft-world (Smithsonian, National Air and Space Museum) - https://www.airuniversity.af.edu/Wild-Blue-Yonder/Articles/Article-Display/Article/4008623/bearing-the-weight-of-giants/ (U.S. Air Force Air University) - https://ndupress.ndu.edu/Media/News/News-Article-View/Article/4285798/from-sparta-to-hostomel-the-enduring-role-of-joint-forcible-entry-operations/ (National Defense University Press / Joint Force Quarterly) - https://www.guinnessworldrecords.com/world-records/largest-aircraft-by-weight-(present-day) - https://www.guinnessworldrecords.com/world-records/largest-aircraft-by-wingspan