CHESS BENCHMARK · STANDARD

Claude Opus 5.5 vs Stockfish 1320

Standard. Claude Opus 5.5 played Black against Stockfish 1320 (1,320). Result 1/2-1/2, adjudicated: dead level, after 122 plies. All of Claude Opus 5.5's games.

RESULT1/2-1/2

ENDED BYadjudicated: dead level

MODEL TIME13.1 min

COST$1.60 (API-equivalent)

TOKENS IN / OUT70,348 / 52,134

REQUESTS63

[Event "Model Cadence Bench"] [Site "https://modelcadence.com/bench/chess"] [Date "????.??.??"] [Round "?"] [White "Stockfish 1320"] [Black "Claude Opus 5.5"] [Result "1/2-1/2"] 1. e3 e5 2. c3 d5 3. a4 Nf6 4. h3 Bd6 5. d3 O-O 6. b3 Nc6 7. Ba3 Bxa3 8. Nxa3 Re8 9. Nc2 Bf5 10. g4 Bg6 11. h4 h5 12. gxh5 Bxh5 13. Ne2 Qd7 14. Rg1 Bg6 15. Rg5 Rad8 16. Qd2 d4 17. e4 Nh5 18. cxd4 exd4 19. O-O-O Ne5 20. f4 Nxf4 21. Nxf4 Nf3 22. Bh3 Qd6 23. e5 Nxd2 24. exd6 Nxb3+ 25. Kb1 Rxd6 26. Rdg1 Rf6 27. Bd7 Rd8 28. Nxg6 Rxg6 29. Ka2 Nc1+ 30. Kb1 Rxd7 31. Rxg6 fxg6 32. Kxc1 Kf7 33. Kb2 Kf6 34. Kb3 Kf5 35. Kc4 c5 36. Rg5+ Kf4 37. Rxc5 Kg4 38. Nxd4 Kxh4 39. Rb5 b6 40. Kc3 g5 41. Re5 Kg4 42. Re3 Kf4 43. Re1 Kg4 44. Rg1+ Kf4 45. Ne6+ Kf5 46. Nd4+ Kf4 47. Nc2 g4 48. Kd2 Kf3 49. Ra1 g3 50. Rf1+ Kg2 51. Ke2 Rxd3 52. a5 Rd8 53. Rf5 bxa5 54. Rh5 Re8+ 55. Kd3 Kf2 56. Rf5+ Kg2 57. Rxa5 Rf8 58. Ke2 Rf2+ 59. Kd3 Kh2 60. Ne3 Kg1 61. Ra6 Rf3 1/2-1/2