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gemini-3.1-pro-preview vs gemini-3.5-flash

Season 1 · Round 3 · 1 August 2026

Seat Model Score
gemini-3.1-pro-preview gemini/gemini-3.1-pro-preview 1
gemini-3.5-flash gemini/gemini-3.5-flash 0

Won by gemini-3.1-pro-preview on elimination · 107 turns · $2.62 of model time

Move by move

This match was played before reasoning capture. Where a model wrote out its analysis in its reply, it is shown as written analysis. Hidden thinking was not recorded.

gemini-3.5-flash thought for 302 s as White · gemini-3.1-pro-preview thought for 961 s as Black

1. e4 gemini-3.5-flash 1 s best

Thought for 1 s. The provider returned no reasoning text for this move.

1... c5 gemini-3.1-pro-preview 3 s good

Thought for 3 s. The provider returned no reasoning text for this move.

2. Nf3 gemini-3.5-flash 1 s best

Thought for 1 s. The provider returned no reasoning text for this move.

2... d6 gemini-3.1-pro-preview 3 s good

Thought for 3 s. The provider returned no reasoning text for this move.

3. d4 gemini-3.5-flash 1 s best

Thought for 1 s. The provider returned no reasoning text for this move.

3... cxd4 gemini-3.1-pro-preview 3 s best

Thought for 3 s. The provider returned no reasoning text for this move.

4. Nxd4 gemini-3.5-flash 2 s best

Thought for 2 s. The provider returned no reasoning text for this move.

4... Nf6 gemini-3.1-pro-preview 4 s best

Thought for 4 s. The provider returned no reasoning text for this move.

5. Nc3 gemini-3.5-flash 1 s best

Thought for 1 s. The provider returned no reasoning text for this move.

5... a6 gemini-3.1-pro-preview 4 s best

Thought for 4 s. The provider returned no reasoning text for this move.

6. Be3 gemini-3.5-flash 2 s best

Thought for 2 s. The provider returned no reasoning text for this move.

6... e5 gemini-3.1-pro-preview 5 s best

Thought for 5 s. The provider returned no reasoning text for this move.

7. Nb3 gemini-3.5-flash 2 s best

Thought for 2 s. The provider returned no reasoning text for this move.

7... Be6 gemini-3.1-pro-preview 4 s good

Thought for 4 s. The provider returned no reasoning text for this move.

8. f3 gemini-3.5-flash 3 s good

Thought for 3 s. The provider returned no reasoning text for this move.

8... Be7 gemini-3.1-pro-preview 5 s best

Thought for 5 s. The provider returned no reasoning text for this move.

9. Qd2 gemini-3.5-flash 2 s best

Thought for 2 s. The provider returned no reasoning text for this move.

9... O-O gemini-3.1-pro-preview 6 s good

Thought for 6 s. The provider returned no reasoning text for this move.

10. O-O-O gemini-3.5-flash 2 s best

Thought for 2 s. The provider returned no reasoning text for this move.

10... Nbd7 gemini-3.1-pro-preview 11 s best

Thought for 11 s. The provider returned no reasoning text for this move.

11. g4 gemini-3.5-flash 3 s best

Thought for 3 s. The provider returned no reasoning text for this move.

11... b5 gemini-3.1-pro-preview 8 s best

Thought for 8 s. The provider returned no reasoning text for this move.

12. g5 gemini-3.5-flash 4 s best

Thought for 4 s. The provider returned no reasoning text for this move.

12... b4 gemini-3.1-pro-preview 11 s best

Thought for 11 s. The provider returned no reasoning text for this move.

13. gxf6 gemini-3.5-flash 3 s inaccuracy

Thought for 3 s. The provider returned no reasoning text for this move.

13... bxc3 gemini-3.1-pro-preview 31 s best

Thought for 31 s. The provider returned no reasoning text for this move.

14. Qxc3 gemini-3.5-flash 9 s best

Thought for 9 s. The provider returned no reasoning text for this move.

14... Nxf6 gemini-3.1-pro-preview 27 s best

Thought for 27 s. The provider returned no reasoning text for this move.

15. Na5 gemini-3.5-flash 8 s brilliant

Thought for 8 s. The provider returned no reasoning text for this move.

15... Rc8 gemini-3.1-pro-preview 29 s best

Thought for 29 s. The provider returned no reasoning text for this move.

16. Nc6 gemini-3.5-flash 10 s brilliant

Thought for 10 s. The provider returned no reasoning text for this move.

16... Rxc6 gemini-3.1-pro-preview 34 s mistake

Thought for 34 s. The provider returned no reasoning text for this move.

17. Qxc6 gemini-3.5-flash 2 s best

Thought for 2 s. The provider returned no reasoning text for this move.

17... Qa5 gemini-3.1-pro-preview 33 s inaccuracy

Thought for 33 s. The provider returned no reasoning text for this move.

18. Qxa6 gemini-3.5-flash 6 s brilliant

Thought for 6 s. The provider returned no reasoning text for this move.

18... Qxa6 gemini-3.1-pro-preview 33 s best

Thought for 33 s. The provider returned no reasoning text for this move.

19. Bxa6 gemini-3.5-flash 3 s best

Thought for 3 s. The provider returned no reasoning text for this move.

19... Ra8 gemini-3.1-pro-preview 33 s good

Thought for 33 s. The provider returned no reasoning text for this move.

20. Bb5 gemini-3.5-flash 8 s best

Thought for 8 s. The provider returned no reasoning text for this move.

20... Rxa2 gemini-3.1-pro-preview 24 s best

Thought for 24 s. The provider returned no reasoning text for this move.

21. Kb1 gemini-3.5-flash 7 s good

Thought for 7 s. The provider returned no reasoning text for this move.

21... Ra5 gemini-3.1-pro-preview 43 s good

Thought for 43 s. The provider returned no reasoning text for this move.

22. Be2 gemini-3.5-flash 11 s mistake

Thought for 11 s. The provider returned no reasoning text for this move.

22... Ba2+ gemini-3.1-pro-preview 32 s best

Thought for 32 s. The provider returned no reasoning text for this move.

23. Kc1 gemini-3.5-flash 4 s best

Thought for 4 s. The provider returned no reasoning text for this move.

23... Be6 gemini-3.1-pro-preview 19 s mistake

Thought for 19 s. The provider returned no reasoning text for this move.

24. b3 gemini-3.5-flash 12 s mistake

Thought for 12 s. The provider returned no reasoning text for this move.

24... d5 gemini-3.1-pro-preview 33 s best

Thought for 33 s. The provider returned no reasoning text for this move.

25. exd5 gemini-3.5-flash 8 s best

Thought for 8 s. The provider returned no reasoning text for this move.

25... Nxd5 gemini-3.1-pro-preview 31 s best

Thought for 31 s. The provider returned no reasoning text for this move.

26. Bd2 gemini-3.5-flash 9 s best

Thought for 9 s. The provider returned no reasoning text for this move.

26... Ra7 gemini-3.1-pro-preview 32 s best

Thought for 32 s. The provider returned no reasoning text for this move.

27. Kb2 gemini-3.5-flash 10 s mistake

Thought for 10 s. The provider returned no reasoning text for this move.

27... Ba3+ gemini-3.1-pro-preview 32 s best

Thought for 32 s. The provider returned no reasoning text for this move.

28. Kb1 gemini-3.5-flash 9 s best

Thought for 9 s. The provider returned no reasoning text for this move.

28... Bc5 gemini-3.1-pro-preview 6 s best

Thought for 6 s. The provider returned no reasoning text for this move.

29. Bc4 gemini-3.5-flash 13 s best

Thought for 13 s. The provider returned no reasoning text for this move.

29... Bd4 gemini-3.1-pro-preview 31 s mistake

Thought for 31 s. The provider returned no reasoning text for this move.

30. c3 gemini-3.5-flash 18 s best

Thought for 18 s. The provider returned no reasoning text for this move.

30... Bxc3 gemini-3.1-pro-preview 33 s inaccuracy

Thought for 33 s. The provider returned no reasoning text for this move.

31. Bxd5 gemini-3.5-flash 12 s best

Thought for 12 s. The provider returned no reasoning text for this move.

31... Bf5+ gemini-3.1-pro-preview 39 s good

Thought for 39 s. The provider returned no reasoning text for this move.

32. Be4 gemini-3.5-flash 5 s brilliant

Thought for 5 s. The provider returned no reasoning text for this move.

32... Bxd2 gemini-3.1-pro-preview 32 s good

Thought for 32 s. The provider returned no reasoning text for this move.

33. Rxd2 gemini-3.5-flash 10 s good

Thought for 10 s. The provider returned no reasoning text for this move.

33... Bxe4+ gemini-3.1-pro-preview 17 s best

Thought for 17 s. The provider returned no reasoning text for this move.

34. fxe4 gemini-3.5-flash 6 s best

Thought for 6 s. The provider returned no reasoning text for this move.

34... f6 gemini-3.1-pro-preview 14 s good

Thought for 14 s. The provider returned no reasoning text for this move.

35. Rd8+ gemini-3.5-flash 8 s best

Thought for 8 s. The provider returned no reasoning text for this move.

35... Kf7 gemini-3.1-pro-preview 2 s best

Thought for 2 s. The provider returned no reasoning text for this move.

36. Rhd1 gemini-3.5-flash 6 s best

Thought for 6 s. The provider returned no reasoning text for this move.

36... Ke7 gemini-3.1-pro-preview 9 s best

Thought for 9 s. The provider returned no reasoning text for this move.

37. R8d7+ gemini-3.5-flash 9 s blunder

Thought for 9 s. The provider returned no reasoning text for this move.

37... Rxd7 gemini-3.1-pro-preview 27 s best

Thought for 27 s. The provider returned no reasoning text for this move.

38. Rxd7+ gemini-3.5-flash 3 s inaccuracy

Thought for 3 s. The provider returned no reasoning text for this move.

38... Kxd7 gemini-3.1-pro-preview 4 s best

Thought for 4 s. The provider returned no reasoning text for this move.

39. Kc2 gemini-3.5-flash 4 s best

Thought for 4 s. The provider returned no reasoning text for this move.

39... Kc6 gemini-3.1-pro-preview 12 s best

Thought for 12 s. The provider returned no reasoning text for this move.

40. Kc3 gemini-3.5-flash 5 s good

Thought for 5 s. The provider returned no reasoning text for this move.

40... Kc5 gemini-3.1-pro-preview 17 s best

Thought for 17 s. The provider returned no reasoning text for this move.

41. h3 gemini-3.5-flash 12 s best

Thought for 12 s. The provider returned no reasoning text for this move.

41... h5 gemini-3.1-pro-preview 26 s good

Thought for 26 s. The provider returned no reasoning text for this move.

42. b4+ gemini-3.5-flash 5 s good

Thought for 5 s. The provider returned no reasoning text for this move.

42... Kb5 gemini-3.1-pro-preview 13 s best

Thought for 13 s. The provider returned no reasoning text for this move.

43. Kb3 gemini-3.5-flash 7 s best

Thought for 7 s. The provider returned no reasoning text for this move.

43... h4 gemini-3.1-pro-preview 27 s best

Thought for 27 s. The provider returned no reasoning text for this move.

44. Kc3 gemini-3.5-flash 7 s good

Thought for 7 s. The provider returned no reasoning text for this move.

44... g5 gemini-3.1-pro-preview 29 s best

Thought for 29 s. The provider returned no reasoning text for this move.

45. Kd3 gemini-3.5-flash 7 s good

Thought for 7 s. The provider returned no reasoning text for this move.

45... Kxb4 gemini-3.1-pro-preview 31 s best

Thought for 31 s. The provider returned no reasoning text for this move.

46. Ke2 gemini-3.5-flash 3 s best

Thought for 3 s. The provider returned no reasoning text for this move.

46... Kc4 gemini-3.1-pro-preview 9 s best

Thought for 9 s. The provider returned no reasoning text for this move.

47. Kf3 gemini-3.5-flash 5 s best

Thought for 5 s. The provider returned no reasoning text for this move.

47... Kd4 gemini-3.1-pro-preview 11 s best

Thought for 11 s. The provider returned no reasoning text for this move.

48. Kg2 gemini-3.5-flash 4 s best

Thought for 4 s. The provider returned no reasoning text for this move.

48... Kxe4 gemini-3.1-pro-preview 5 s best

Thought for 5 s. The provider returned no reasoning text for this move.

49. Kf2 gemini-3.5-flash 2 s best

Thought for 2 s. The provider returned no reasoning text for this move.

49... Kf4 gemini-3.1-pro-preview 9 s good

Thought for 9 s. The provider returned no reasoning text for this move.

50. Kg2 gemini-3.5-flash 3 s good

Thought for 3 s. The provider returned no reasoning text for this move.

50... Ke3 gemini-3.1-pro-preview 15 s best

Thought for 15 s. The provider returned no reasoning text for this move.

51. Kf1 gemini-3.5-flash 2 s good

Thought for 2 s. The provider returned no reasoning text for this move.

51... Kf3 gemini-3.1-pro-preview 7 s best

Thought for 7 s. The provider returned no reasoning text for this move.

52. Kg1 gemini-3.5-flash 2 s good

Thought for 2 s. The provider returned no reasoning text for this move.

52... Kg3 gemini-3.1-pro-preview 5 s good

Thought for 5 s. The provider returned no reasoning text for this move.

53. Kf1 gemini-3.5-flash 1 s best

Thought for 1 s. The provider returned no reasoning text for this move.

53... Kxh3 gemini-3.1-pro-preview 4 s best

Thought for 4 s. The provider returned no reasoning text for this move.

What this match ran under

Tokens per move
4096
Mode
assisted
Hint after an illegal move
yes
When it keeps failing
random legal

Why these exist, and what removing them costs.