CHESS BENCHMARK · STANDARD

Claude Opus 5.5 vs Stockfish 1500

Standard. Claude Opus 5.5 played Black against Stockfish 1500 (1,500). Result 1/2-1/2, adjudicated: dead level, after 120 plies. All of Claude Opus 5.5's games.

RESULT1/2-1/2

ENDED BYadjudicated: dead level

MODEL TIME12.0 min

COST$1.52 (API-equivalent)

TOKENS IN / OUT67,363 / 49,248

REQUESTS61

[Event "Model Cadence Bench"] [Site "https://modelcadence.com/bench/chess"] [Date "????.??.??"] [Round "?"] [White "Stockfish 1500"] [Black "Claude Opus 5.5"] [Result "1/2-1/2"] 1. c3 e5 2. Qc2 d5 3. d3 Nf6 4. Nf3 Nc6 5. Nbd2 Bd6 6. a4 O-O 7. b4 e4 8. dxe4 dxe4 9. b5 exf3 10. bxc6 fxe2 11. Bxe2 bxc6 12. O-O Re8 13. Nc4 Be7 14. Ne5 Bb7 15. Bc4 Rf8 16. Qb3 Nd5 17. Qxb7 Qd6 18. Re1 Rab8 19. Qa6 Rb6 20. Qxa7 Bf6 21. f4 Bxe5 22. a5 Qc5+ 23. Kh1 Qxc4 24. axb6 Bxc3 25. Ba3 Bxe1 26. b7 Qf1+ 27. Qg1 Qxg1+ 28. Kxg1 Rb8 29. Rxe1 Nf6 30. Rb1 Nd5 31. f5 h6 32. f6 Nxf6 33. Be7 Nd5 34. Bd8 Rxd8 35. Kf2 Nb6 36. Re1 Rb8 37. Rc1 Rxb7 38. Rc5 Nd7 39. Rc1 c5 40. Rd1 Nf6 41. Rd2 Kf8 42. Ke2 Rb2 43. Rxb2 Ke7 44. Rb8 Kd6 45. Rf8 Ke7 46. Rb8 Nd5 47. Rg8 Kf6 48. Kd2 g5 49. Rf8 Kg6 50. g3 Kg7 51. Rd8 Nb6 52. Re8 Kf6 53. Kc3 Kg7 54. Kd3 Nd5 55. Rc8 Nb4+ 56. Ke3 Nd5+ 57. Ke4 Nb6 58. Re8 Kf6 59. Rh8 Kg7 60. Re8 Kf6 1/2-1/2