How to Say "all-time best" in Spanish
The Spanish word for “all-time best” is “récord” — B1 level. This is a very common word in everyday Spanish.

Examples
El atleta rompió el récord mundial de los 100 metros planos.
The athlete broke the world record for the 100-meter dash.
Este verano registramos un récord de visitantes en el parque nacional.
This summer we registered a record number of visitors in the national park.
Su récord de ventas en un solo día es impresionante.
Their sales record in a single day is impressive.
Masculine Noun
Even though it ends in 'd', 'récord' is a masculine noun, so you always use 'el' or 'un' before it (e.g., 'el récord más alto').
Pronouncing the Plural
Mistake: “Using 'récord' for the plural form.”
Correction: The correct plural is 'récords'. The accent remains on the 'e', but unlike many Spanish plurals, the stress doesn't shift when adding the 's'.
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