How do we know that Stockfish elo is 3400? Is it just an approximation? - Quora

Stockfish 16 is Available on Chessify for Free Chess Analysis

rating - Why have engines not increased top rated chess players' Elo? - Chess Stack Exchange

Stockfish 16 - official release version

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SPCC

LcZero ELO Rating List Estimates (Includes: AlphaZero, All Stockfish version releases, Stockfish Variants, Lc0 CUDA, and TCEC Div1+DivP Engines)

Approximately, at what level of the open source chess engine Stockfish would most grandmasters be on par with? - Quora

Debunking the Chessboard: Confronting GPTs Against Chess Engines to Estimate Elo Ratings and Assess Legal Move Abilities – Mathieu Acher – Professor in Computer Science

Stockfish 16 Beta (3957) Vs Alphazero (4000) Game 1, Stockfish 16, Alpha Zero, Stokfish