Caruana currently has 130.42 points, just ahead of Erigaisi on 124.40FIDE Circuit 2024 is one of the paths to qualify for the FIDE Candidates Tournament 2026. One player who would achieve the highest results during 2024 in eligible tournaments gets the spot in the FIDE Candidates.
Each player has to play in a minimum of five eligible tournaments, including at least four with a standard time control.
The final score is calculated as the sum of the player’s up to seven highest scores.
If wiki is to be believed they have both met the qualifying criteria
I reckon that winning the World Rapid outright would give 25.49 points and the World Blitz 19.12 points (might be wrong, this may change e.g. if Gukesh doesn't play the points available may drop slightly)
Erigaisi's 2 lowest counting scores are 14.00 and 15.81, so he has scope to increase his score a bit, but would need the Rapid (not sure if joint first and a win on tiebreak would be enough) to overtake Caruana (whose lowest scores are 13.92 and 15.92)