A normal human? Hard to replace, unknown value, given basic rights and dignities but usually not supported to live.
A murderer? Hard to replace but negative value, put to death in many jurisdictions.
A domestic animal? Medium-hard to replace, value is low but known, easy to adopt but also easy to euthanize or ignore. If they attack your cows or crops you'd shoot them.
A farm animal? Easy to replace, grown and eaten for luxury food.
The HeLa cell line? Easy to replace, treated like bacteria.
A human fetus? A matter of great political debate whether they are valuable or replaceable.
Based on this trend line regression, I don't see AIs ever gaining human rights. They're replaceable.