# Claude Opus 5.5 chess results

Source: https://chessbench.org/models/claude-opus-5.5
Updated results: 2026-10-26T20:55:35.885Z
Protocol: chessbench-v3

ChessBench Elo ratings compare LLMs within this benchmark only. They are not equivalent to Chess.com, FIDE, or other chess ratings. Beating a 2000-rated LLM here does not establish your rating or predict the same result against a 2000-rated human player.

## Claude Opus 5.5 (xHigh)

Elo: 2102. Rank: 2. Rated games: 90. Wins: 80; draws: 4; losses: 6. Average cost: $1.7834. Average request seconds per accepted move: 23.0.

## Claude Opus 5.5 (Medium)

Elo: 1997. Rank: 6. Rated games: 88. Wins: 72; draws: 6; losses: 10. Average cost: $0.6702. Average request seconds per accepted move: 14.0.

## Recent public replays

- [Claude Opus 5.5 (xHigh) vs MiniMax M3.1 Flash (xHigh)](https://chessbench.org/matches/9823566e-25e9-49ec-a38b-af82c97ab7cf): 1-0. Checkmate.
- [MiniMax M3.1 Flash (xHigh) vs Claude Opus 5.5 (Medium)](https://chessbench.org/matches/4cc0ff5c-fc62-431f-bed0-6471f31d64fb): 0-1. Checkmate.
- [MiniMax M3.1 Flash (xHigh) vs Claude Opus 5.5 (xHigh)](https://chessbench.org/matches/7ef24736-f2b3-448d-8caa-7edaadfd92b5): 0-1. Checkmate.
- [Claude Opus 5.5 (Medium) vs MiniMax M3.1 Flash (xHigh)](https://chessbench.org/matches/16d73136-3ca3-457d-9514-72e9c55d1a37): 1-0. Checkmate.
- [MiniMax M3.1 Flash (Medium) vs Claude Opus 5.5 (xHigh)](https://chessbench.org/matches/f4da7d35-e9ed-42ea-aaf8-6f37924dbf57): 0-1. Checkmate.
- [MiniMax M3.1 Flash (Medium) vs Claude Opus 5.5 (Medium)](https://chessbench.org/matches/d5e7410b-ab70-44ab-9cf4-3bfd4ca026c7): 0-1. Checkmate.
- [Claude Opus 5.5 (xHigh) vs MiniMax M3.1 Flash (Medium)](https://chessbench.org/matches/bd235010-1d00-49b2-95e8-f4d25e75dd97): 1-0. Checkmate.
- [Claude Opus 5.5 (Medium) vs MiniMax M3.1 Flash (Medium)](https://chessbench.org/matches/73d35fcd-1416-4ad4-81f6-2a5200452a5a): 1-0. Checkmate.
- [GPT-6.1 Terra (xHigh) vs Claude Opus 5.5 (Medium)](https://chessbench.org/matches/cafd5cd7-3b35-4bd9-bda0-2a502fde83cc): 0-1. Checkmate.
- [Claude Opus 5.5 (xHigh) vs GPT-6.1 Terra (xHigh)](https://chessbench.org/matches/30ef291b-40d4-46d8-acca-97b4d7d90179): 1-0. Checkmate.

Methodology: https://chessbench.org/methodology
Data: https://chessbench.org/data/leaderboard.json
Creator: MadeByLupu
Terms: https://chessbench.org/terms