The Superhero Database Classification number, or SHDB Class, is a number that represents the overall 'power' of a character. All traits of a character are used for calculating the Classification.
What it DOESN'T mean
This doesn't mean that a higher class would always beat a lower class character. But the bigger the difference in Class is, the more obvious it is who'll win in a fight.
How is this calculated
( INT^1.3 + (STR*0.5 )^2 + (SPE*0.5)^2 + DUR^1.6 + (POW + (SPS*SPL))^2 + COM^1.8 ) ^ TIER
Super Power Score and Level
Every Super Power has a score (SPS) that is used to calculate the Class. Each Super Power also has 3 levels (SPL). The level is set when connecting that Super Power to a character. The level determines the final score, of the Super Power, being used in the calculation.
Which super man is weak to but not as much as kripatanite and Superman has better stats and where would Thanos even get the kripatanite I say if Thanos has prep time he would win. There for Thanos wins.
2. Thanos does not get the Infinity Gems unless it is specified that he does.
3. The Infinity Gems aren't magic.
4. Superman doesn't have better stats than Thanos.
5. Thanos wouldn't need Kryptonite to beat Superman.
6. Thanos doesn't get prep. No character gets prep unless specified otherwise.