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gemini-3.1-pro-preview vs grok-4.5

Season 1 · Round 3 · 1 August 2026

Seat Model Score
gemini-3.1-pro-preview gemini/gemini-3.1-pro-preview 1
grok-4.5 xai/grok-4.5 0

Won by gemini-3.1-pro-preview on elimination · 54 turns · $1.19 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-3.1-pro-preview thought for 326 s as White · grok-4.5 thought for 1767 s as Black

1. e4 gemini-3.1-pro-preview 2 s best

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

1... e5 grok-4.5 3 s best

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

2. Nf3 gemini-3.1-pro-preview 2 s best

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

2... Nc6 grok-4.5 2 s best

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

3. Bb5 gemini-3.1-pro-preview 3 s best

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

3... a6 grok-4.5 3 s best

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

4. Ba4 gemini-3.1-pro-preview 3 s best

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

4... Nf6 grok-4.5 4 s best

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

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

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

5... b5 grok-4.5 8 s best

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

6. Bb3 gemini-3.1-pro-preview 3 s best

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

6... Be7 grok-4.5 6 s best

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

7. Re1 gemini-3.1-pro-preview 4 s best

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

7... O-O grok-4.5 6 s best

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

8. c3 gemini-3.1-pro-preview 6 s best

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

8... d5 grok-4.5 8 s good

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

9. exd5 gemini-3.1-pro-preview 6 s best

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

9... Nxd5 grok-4.5 6 s best

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

10. Nxe5 gemini-3.1-pro-preview 14 s brilliant

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

10... Nxe5 grok-4.5 8 s best

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

11. Rxe5 gemini-3.1-pro-preview 5 s best

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

11... c6 grok-4.5 125 s good

Thought for 125 s. The provider returned no reasoning text for this move.

12. d4 gemini-3.1-pro-preview 6 s best

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

12... Bd6 grok-4.5 15 s best

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

13. Re1 gemini-3.1-pro-preview 5 s best

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

13... Qh4 grok-4.5 7 s best

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

14. g3 gemini-3.1-pro-preview 8 s best

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

14... Qh3 grok-4.5 32 s best

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

15. Bxd5 gemini-3.1-pro-preview 31 s inaccuracy

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

15... cxd5 grok-4.5 580 s best

Thought for 580 s. The provider returned no reasoning text for this move.

16. Qf3 gemini-3.1-pro-preview 13 s best

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

16... Bg4 grok-4.5 32 s brilliant

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

17. Qg2 gemini-3.1-pro-preview 16 s mistake

Thought for 16 s. The provider returned no reasoning text for this move.

17... Qxg2+ grok-4.5 120 s mistake

Thought for 120 s. The provider returned no reasoning text for this move.

18. Kxg2 gemini-3.1-pro-preview 3 s best

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

18... b4 grok-4.5 127 s best

Thought for 127 s. The provider returned no reasoning text for this move.

19. cxb4 gemini-3.1-pro-preview 30 s good

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

19... Bxb4 grok-4.5 31 s best

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

20. Bd2 gemini-3.1-pro-preview 32 s brilliant

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

20... Bxd2 grok-4.5 100 s good

Thought for 100 s. The provider returned no reasoning text for this move.

21. Nxd2 gemini-3.1-pro-preview 6 s best

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

21... Rfe8 grok-4.5 31 s inaccuracy

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

22. Nb3 gemini-3.1-pro-preview 33 s good

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

22... Be2 grok-4.5 60 s good

Thought for 60 s. The provider returned no reasoning text for this move.

23. Nc5 gemini-3.1-pro-preview 36 s best

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

23... Bc4 grok-4.5 198 s mistake

Thought for 198 s. The provider returned no reasoning text for this move.

24. b3 gemini-3.1-pro-preview 34 s inaccuracy

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

24... Bd3 grok-4.5 239 s blunder

Thought for 239 s. The provider returned no reasoning text for this move.

25. Nxd3 gemini-3.1-pro-preview 12 s best

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

25... Rxe1 grok-4.5 8 s best

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

26. Rxe1 gemini-3.1-pro-preview 8 s best

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

26... Re8 grok-4.5 8 s mistake

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

27. Rxe8# 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.