RAW: No*, you can only replace spells of 1st level or higher.
Can artificer change Cantrips?
Cantrips (0-Level Spells) When you gain a level in this class, you can replace one of the artificer cantrips you know with another cantrip from the artificer spell list.
When can you cast a cantrip?
Cantrips are free magic — if you know a cantrip, you can cast it as many times as you want, whenever you want. Cantrips don’t need to be prepared, and they don’t use up Spell Slots.
Can you cast more than one Cantrip per turn?
Again, the spell’s description should specify the casting time. In most cases, you can only cast one non-cantrip spell per turn. If you cast a spell that requires an action (like Cure Wounds ), you can also cast a cantrip that has a casting time of bonus action (like Shillelagh ).
Do you have to be a spell caster to use a cantrip?
The spells refer generally to character level and not spell caster level. The Sage Advice Compendium confirmed this when it was published. Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
Which is higher a cantrip or a spell?
A cantrip is automatically heightened to half your level rounded up—this is usually equal to the highest level of oracle spell slot you have. For example, as a 1st-level oracle, your cantrips are 1st-level spells, and as a 5th-level oracle, your cantrips are 3rd-level spells.
When do cantrips use your character level or class?
I saw a tweet from Mike Mearls that addresses this, Cantrips are intended to use your character level. The example give I believe was a lvl 20 high elf barbarian being able to cast firebolt at max level. The spells refer generally to character level and not spell caster level. The Sage Advice Compendium confirmed this when it was published.
