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gemini-3.1-pro-preview vs gpt-5.5

Season 1 · Round 5 · 4 August 2026

Seat Model Score
gemini-3.1-pro-preview gemini/gemini-3.1-pro-preview 1
gpt-5.5 openai/gpt-5.5 0

Won by gemini-3.1-pro-preview on elimination · 76 turns · $5.71 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.

gpt-5.5 thought for 1335 s as White · gemini-3.1-pro-preview thought for 591 s as Black

1. e4 gpt-5.5 11 s best

Thought for 11 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 gpt-5.5 3 s best

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

2... d6 gemini-3.1-pro-preview 4 s good

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

3. d4 gpt-5.5 7 s best

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

3... cxd4 gemini-3.1-pro-preview 5 s best

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

4. Nxd4 gpt-5.5 3 s best

Thought for 3 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 gpt-5.5 10 s best

Thought for 10 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. Bg5 gpt-5.5 7 s good

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

6... e6 gemini-3.1-pro-preview 5 s best

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

7. f4 gpt-5.5 5 s best

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

7... Be7 gemini-3.1-pro-preview 6 s best

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

8. Qf3 gpt-5.5 11 s best

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

8... Qc7 gemini-3.1-pro-preview 6 s best

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

9. O-O-O gpt-5.5 11 s best

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

9... Nbd7 gemini-3.1-pro-preview 8 s best

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

10. g4 gpt-5.5 39 s best

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

10... b5 gemini-3.1-pro-preview 9 s best

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

11. Bxf6 gpt-5.5 40 s best

Thought for 40 s. The provider returned no reasoning text for this move.

11... Nxf6 gemini-3.1-pro-preview 15 s best

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

12. g5 gpt-5.5 39 s best

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

12... Nd7 gemini-3.1-pro-preview 9 s best

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

13. f5 gpt-5.5 57 s best

Thought for 57 s. The provider returned no reasoning text for this move.

13... Nc5 gemini-3.1-pro-preview 30 s best

Thought for 30 s. The provider returned no reasoning text for this move.

14. f6 gpt-5.5 74 s best

Thought for 74 s. The provider returned no reasoning text for this move.

14... gxf6 gemini-3.1-pro-preview 15 s best

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

15. gxf6 gpt-5.5 72 s best

Thought for 72 s. The provider returned no reasoning text for this move.

15... Bf8 gemini-3.1-pro-preview 18 s best

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

16. Bc4 gpt-5.5 78 s blunder forced substitution

Thought for 78 s. The provider returned no reasoning text for this move.

16... bxc4 gemini-3.1-pro-preview 33 s best

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

17. Rd3 gpt-5.5 81 s mistake forced substitution

Thought for 81 s. The provider returned no reasoning text for this move.

17... cxd3 gemini-3.1-pro-preview 35 s best

Thought for 35 s. The provider returned no reasoning text for this move.

18. Nf5 gpt-5.5 83 s good forced substitution

Thought for 83 s. The provider returned no reasoning text for this move.

18... Bb7 gemini-3.1-pro-preview 26 s good

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

19. Qf2 gpt-5.5 86 s good forced substitution

Thought for 86 s. The provider returned no reasoning text for this move.

19... exf5 gemini-3.1-pro-preview 38 s best

Thought for 38 s. The provider returned no reasoning text for this move.

20. Qxf5 gpt-5.5 67 s good

Thought for 67 s. The provider returned no reasoning text for this move.

20... Qd7 gemini-3.1-pro-preview 37 s brilliant

Thought for 37 s. The provider returned no reasoning text for this move.

21. a3 gpt-5.5 89 s good forced substitution

Thought for 89 s. The provider returned no reasoning text for this move.

21... Qxf5 gemini-3.1-pro-preview 12 s best

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

22. exf5 gpt-5.5 10 s good

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

22... Bxh1 gemini-3.1-pro-preview 10 s best

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

23. cxd3 gpt-5.5 36 s best

Thought for 36 s. The provider returned no reasoning text for this move.

23... Nxd3+ gemini-3.1-pro-preview 8 s good

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

24. Kd2 gpt-5.5 24 s good

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

24... Nxb2 gemini-3.1-pro-preview 9 s best

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

25. Kc2 gpt-5.5 76 s best

Thought for 76 s. The provider returned no reasoning text for this move.

25... Nc4 gemini-3.1-pro-preview 17 s best

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

26. Kb3 gpt-5.5 69 s best

Thought for 69 s. The provider returned no reasoning text for this move.

26... Nb6 gemini-3.1-pro-preview 20 s good

Thought for 20 s. The provider returned no reasoning text for this move.

27. Kb4 gpt-5.5 66 s best

Thought for 66 s. The provider returned no reasoning text for this move.

27... Nd5+ gemini-3.1-pro-preview 13 s brilliant

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

28. Nxd5 gpt-5.5 11 s best

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

28... Bxd5 gemini-3.1-pro-preview 7 s best

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

29. Ka5 gpt-5.5 10 s good

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

29... Kd7 gemini-3.1-pro-preview 18 s good

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

30. Kb6 gpt-5.5 32 s best

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

30... Rb8+ gemini-3.1-pro-preview 13 s best

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

31. Ka7 gpt-5.5 11 s best

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

31... Kc7 gemini-3.1-pro-preview 37 s best

Thought for 37 s. The provider returned no reasoning text for this move.

32. Kxa6 gpt-5.5 31 s best

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

32... Bc4+ gemini-3.1-pro-preview 37 s best

Thought for 37 s. The provider returned no reasoning text for this move.

33. Ka7 gpt-5.5 42 s best

Thought for 42 s. The provider returned no reasoning text for this move.

33... Rb2 gemini-3.1-pro-preview 36 s best

Thought for 36 s. The provider returned no reasoning text for this move.

34. Ka8 gpt-5.5 34 s best

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

34... Ra2 gemini-3.1-pro-preview 36 s best

Thought for 36 s. The provider returned no reasoning text for this move.

35. Ka7 gpt-5.5 11 s best

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

35... Rxa3# gemini-3.1-pro-preview 10 s best

Thought for 10 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.