The media are saying "It is mathematically impossible for Trump to win without recounts" and in fact we can make a stronger statement - it is highly unlikely that Trump will win even with recounts given the margins. So far there is not one story of substantial fraud that looks plausible (let alone probable) and the two closest that I have found are a data entry error by a polling company (leading to "they suddenly found 100k Biden votes" posts all over the alt-right-o-sphere) and a postal worker in Michigan caught on the Canadian boarder with 1k postal items in his truck including three ballots.
The election process is still ongoing, the media is simply saying Biden is their guess.
Allegations of cheating will be investigated before we get the final result.