A lot more divergence in the models than the presidential race.
Generally speaking Democrats are not favored to keep their Senate majority, but have a chance. And the House is roughly a toss-up, if slightly lean Democrat.
To contextualize these numbers more, we should probably expect whoever wins the Presidency to win the House as well. As down ballot coattails are a bit of a thing.
For my part I think the Democrats will retake the House. I think the Republicans will retake the Senate.
FiveThirtyEight: Senate: Democrats 9%
House: Democrats 49%
Split Ticket: Senate: Democrats 28%
House: Democrats 53%
The Economist: Senate: Democrats 29%
House: Democrats 56%
JHK: Senate: Democrats 27%
House: Democrats 45%
Decision Desk: Senate: Democrats 26%
House: Democrats 47%
Race to the White House: Senate: Democrats 35%
House: Democrats 70%