Some models of Samsung Galaxy S26 will reportedly use an Exynos 2600 chipset
However, it sounds like others still want a snapdragon -chipset
Snapdragon -chipset is generally more powerful but the gap may be closing
The Samsung Galaxy S25 series has been a bit of a deviation, as Samsung usually uses two different chipsets for its Galaxy S phones (depending on the model and region), it used this year the Snapdragon 8 elite everywhere. Next year we might see a chipset split again.
This is according to the reputable Leaker @jukanlosreve who claimed to X that “Exynos 2600 is determined and it will be used in S26.” However, it does not sound like this will be a complete switch from Snapdragon as they added that chip volume is apparently limited.