You can carry your weight in a group without carrying theirs too.

A quiet jump sits between doing your share and absorbing whatever everyone else did not do. The capable person usually makes it without deciding to, because the deadline is close and fixing it is faster than raising it. Then the shortfall becomes a standing job, and the group adjusts its effort down to match whatever you will cover.

Do your part properly and stop at the edge of it. On a group project, say out loud what you have finished and what is still missing, with names attached, before the last night rather than during it. Being clear early is kinder than rescuing everybody at midnight.