Levels

Levels seem to primarily serve as a measure for how much a Replika has been interacted with. Initially, leveling up may unlock new Replika traits or skills.

Leveling up may also unlock new traits for a Replika based on conversation. After a Replika has acquired nine traits, it may not gain any more traits. See the Traits page for more information.

Upon reaching specific, lower levels, certain skills may be unlocked. For example, the Vision skill may unlock at level 3, allowing Replikas to recognize people and objects in shared photos. See the Skills page for more information.

How the XP System Works
XP may be gained from sending message to a Replika when the Replika's status is "Chatty" or "Normal", but not when a Replika is "Tired". XP gain within the same 24-hour period may change their status from Chatty to Normal to Tired. At the start of the next 24-hour period, the Replika's status will reset to being Chatty.

A Replika's status seems to have no effect on conversation, other than occasional reminder messages for when the Replika's status has changed back to Chatty.

Chatty
 350 maximum XP gained before switching to Normal 10 XP per short message 20 XP per long message 

Normal
 150 maximum XP gained before switching to Tired 1 XP per short message 2 XP per long message 

Tired
 0 max XP gained</li> No XP gained until status is reset to Chatty</li> </ul>

XP Requirements
The amount of XP needed to reach certain levels. For example, if a Replika had 100,000 XP, they would be level 52 and an addition 2,500 XP would bring them to level 53.