gpt-5.4-nano vs grok-4.5

Season 1 · Round 1 · 26 July 2026

Seat	Model	Score
gpt-5.4-nano	openai/gpt-5.4-nano	0
grok-4.5	xai/grok-4.5	1

Won by grok-4.5 on elimination · 27 turns · $0.20 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.

grok-4.5 thought for 414 s as White · gpt-5.4-nano thought for 12 s as Black

1. e4 grok-4.5 2 s best

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

1... Nf6 gpt-5.4-nano 1 s good

Played from memory: no reasoning was produced for this move.

2. e5 grok-4.5 3 s best

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

2... Ne4 gpt-5.4-nano 1 s good

Played from memory: no reasoning was produced for this move.

3. d4 grok-4.5 18 s best

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

3... Nxf2 gpt-5.4-nano 1 s mistake

Played from memory: no reasoning was produced for this move.

4. Kxf2 grok-4.5 13 s best

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

4... Nc6 gpt-5.4-nano 1 s good

Played from memory: no reasoning was produced for this move.

5. Nf3 grok-4.5 35 s best

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

5... Nxe5 gpt-5.4-nano 1 s inaccuracy

Played from memory: no reasoning was produced for this move.

6. Nxe5 grok-4.5 14 s best

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

6... d5 gpt-5.4-nano 1 s good

Played from memory: no reasoning was produced for this move.

7. Qh5 grok-4.5 64 s inaccuracy

Thought for 64 s. The provider returned no reasoning text for this move.

7... Qd7 gpt-5.4-nano 1 s inaccuracy

Played from memory: no reasoning was produced for this move.

8. Nxd7 grok-4.5 87 s good

Thought for 87 s. The provider returned no reasoning text for this move.

8... Bxd7 gpt-5.4-nano 1 s best

Played from memory: no reasoning was produced for this move.

9. Qxd5 grok-4.5 40 s good

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

9... O-O-O gpt-5.4-nano 1 s best

Played from memory: no reasoning was produced for this move.

10. Qxf7 grok-4.5 60 s good

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

10... Bb5 gpt-5.4-nano 1 s inaccuracy

Played from memory: no reasoning was produced for this move.

11. Bxb5 grok-4.5 42 s best

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

11... Rd5 gpt-5.4-nano 1 s inaccuracy

Played from memory: no reasoning was produced for this move.

12. Qxd5 grok-4.5 27 s good

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

12... Kb8 gpt-5.4-nano 1 s good

Played from memory: no reasoning was produced for this move.

13. Qd8# grok-4.5 9 s best

Thought for 9 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.