Are the story mode characters playable in gta online?

Grand Theft Auto Online is the online multiplayer component of Grand Theft Auto V, released on multiple platforms between 2013 and 2022. It allows up to 30 players to explore the open world of San Andreas, which includes Los Santos and surrounding countryside. Players control a customizable silent protagonist, and the game offers cooperative and competitive modes. The Wikipedia entry does not mention the ability to play as characters from the single‑player story mode, nor does it describe any crossover of story characters into the online environment. Therefore, based on the available evidence, we cannot confirm that story mode characters are playable in GTA Online.