CHESS BENCHMARK · STANDARD

Claude Opus 5.5 vs Stockfish 1500

Standard. Claude Opus 5.5 played Black against Stockfish 1500 (1,500). Result 1-0, adjudicated: decisive advantage, after 158 plies. All of Claude Opus 5.5's games.

RESULT1-0

ENDED BYadjudicated: decisive advantage

MODEL TIME15.9 min

COST$2.17 (API-equivalent)

TOKENS IN / OUT105,960 / 65,971

REQUESTS85

[Event "Model Cadence Bench"] [Site "https://modelcadence.com/bench/chess"] [Date "????.??.??"] [Round "?"] [White "Stockfish 1500"] [Black "Claude Opus 5.5"] [Result "1-0"] 1. e3 e5 2. Nc3 d5 3. Qh5 Nc6 4. Bb5 Bd7 5. Nxd5 Nf6 6. Qf3 Nxd5 7. Qxd5 Bd6 8. a3 O-O 9. b3 Ne7 10. Qxb7 Bxb5 11. Qxb5 Rb8 12. Qd3 Ng6 13. Bb2 e4 14. Qd5 Re8 15. Qd4 Be5 16. Qxd8 Rexd8 17. Ra2 Bxb2 18. Rxb2 Ne5 19. Ra2 Rd6 20. Ne2 Rbd8 21. h3 Rxd2 22. Nc3 f5 23. O-O Kf7 24. Nb1 Rd1 25. b4 Rxf1+ 26. Kxf1 Rd1+ 27. Ke2 Rc1 28. Nc3 Nd3 29. cxd3 exd3+ 30. Kd2 Rg1 31. a4 Rxg2 32. Kxd3 Rh2 33. a5 Rxh3 34. Rc2 c6 35. Ne2 Rh6 36. Ng3 Rf6 37. Rc1 g6 38. Rh1 h5 39. Kc3 Ke6 40. Kd3 Kd5 41. Ne2 Ke5 42. Nd4 a6 43. f4+ Kd5 44. Rg1 h4 45. Rc1 h3 46. Nb3 h2 47. Nd2 Rf8 48. Rh1 Rh8 49. Nb3 g5 50. fxg5 Rh5 51. Nd2 Rxg5 52. Rxh2 Rg4 53. Rh6 Rxb4 54. Rf6 Ke5 55. Rxc6 Ra4 56. Rc3 Ra2 57. Nc4+ Kd5 58. Ra3 Rg2 59. Rc3 Rg4 60. Nb2 Rg2 61. Nc4 Rg4 62. Nd2 Ra4 63. Nc4 Ra2 64. Rb3 Rh2 65. Rb2 Rh3 66. Rb4 Rh6 67. Rb6 Rh3 68. Rf6 Rf3 69. Rf8 Ke6 70. Rh8 Kd5 71. Nd2 Rf2 72. Rf8 Ke5 73. Rb8 Rg2 74. Rb6 Rg3 75. Rc6 f4 76. Rc5+ Kd6 77. Ne4+ Ke6 78. Nxg3 fxg3 79. Rg5 Kf6 1-0