Fivethirtyeight currently predicts Trump has a 14% chance of winning versus Biden's 86% chance. Comparatively, Fivethirtyeight's final prediction during 2016 was Trump with a 29% chance of winning compared to Hillary's 71% chance. Fivethirtyeight was the only predictive outlet that used a number below 85% for Hillary's chances to win, making their model likely more realistic than others.
I personally consider their model to be heavily biased towards Biden, as they're once again using polls which oversample Democrats. Polls generally oversample Democrats because there are quite simply more Democrats in the US than there are Republicans, however Democrat turnout was abysmal in 2016. Will it be as abysmal in 2020? No one is quite sure, since the DNC skipped most of the primaries (which can be used to predict general election turnout) it's really impossible to know what Democrat turnout will look like. If Democrats bother actually voting, it's an easy win for Biden, if they vote at the same levels as they did in 2016, it's a guaranteed loss.