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Stockfish level and its rating
The meaning of stockfish levels on lichess 1-8Level 1: Skill -9, Depth 5, 50ms
Level 2: Skill -5, Depth 5, 100ms
Level 3: Skill -1, Depth 5, 150ms
Level 4: Skill 3, Depth 5, 200ms
Level 5: Skill 7, Depth 5, 300ms
Level 6: Skill 11, Depth 8, 400ms
Level 7: Skill 16, Depth 13, 500ms
Level 8: Skill 20, Depth 22, 1000ms
when you are playing A.I level 3, you are playing a stockfish that has only 0,15 seconds to make a decision, with articially reduced skill.
LiChess Stockfish ratings (LiChess rating, not ELO):
Level 1 = 800
Level 2 = 1100
Level 3 = 1400
Level 4 = 1700
Level 5 = 2000
Level 6 = 2300
Level 7 = 2700
Level 8 = 3000
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