GPT-6 Luna
Openai · released 2026-09-22 · route gpt-6-luna · Model profile
Opening gap: +178 (95%: -52 to +407). The interval includes zero, so we can't yet say whether it performs differently across the variants.
Standard
- Rating
- 87595%: 713 to 1,036
- Record
- 14 won, 0 drawn, 10 lost of 24
- Accuracy (open positions)
- 81.9
- Accuracy (all moves)
- 84.7
- Average centipawn loss
- 105
- Blunders / mistakes / inaccuracies per 100 moves
- 9.9 / 3.6 / 11.3
- Matched Stockfish's first choice
- 31%
- In Stockfish's top three
- 53%
- Legal on the first try
- 91.5%
- Illegal / invalid
- 73 of 761 answers
- Forfeits
- 2
- Adjudicated games
- 15
- API-equivalent cost per game
- $0.021
- API-equivalent cost per move
- $0.0008
- Seconds per move
- 10.4
- Model minutes per game
- 5.0
- Tokens per move (in / out)
- 11,207 / 585
- Reasoning tokens per move
- 569
- Aborted on our side (not counted)
- 0
By phase
| Phase | Moves | Accuracy | Centipawn loss | Blunders /100 | Engine match |
|---|---|---|---|---|---|
| Opening | 236 | 87.7 | 54 | 7.6 | 43% |
| Middlegame | 284 | 75.9 | 133 | 11.6 | 25% |
| Endgame | 168 | 76.9 | 130 | 10.1 | 23% |
Chess960
- Rating
- 69795%: 534 to 861
- Record
- 13 won, 0 drawn, 11 lost of 24
- Accuracy (open positions)
- 71.6
- Accuracy (all moves)
- 80.2
- Average centipawn loss
- 131
- Blunders / mistakes / inaccuracies per 100 moves
- 14.7 / 7.4 / 12.7
- Matched Stockfish's first choice
- 20%
- In Stockfish's top three
- 43%
- Legal on the first try
- 89.7%
- Illegal / invalid
- 77 of 684 answers
- Forfeits
- 2
- Adjudicated games
- 18
- API-equivalent cost per game
- $0.021
- API-equivalent cost per move
- $0.0008
- Seconds per move
- 12.2
- Model minutes per game
- 5.2
- Tokens per move (in / out)
- 11,401 / 708
- Reasoning tokens per move
- 692
- Aborted on our side (not counted)
- 0
By phase
| Phase | Moves | Accuracy | Centipawn loss | Blunders /100 | Engine match |
|---|---|---|---|---|---|
| Opening | 232 | 74.3 | 107 | 17.2 | 19% |
| Middlegame | 272 | 66.8 | 153 | 12.9 | 18% |
| Endgame | 103 | 70.9 | 128 | 13.6 | 27% |
Games
Standard as blackWon vs Skill 0, 50% random moves76 plies · adjudicated: decisive advantage · $0.027Chess960 as blackWon vs Skill 0, 50% random moves46 plies · adjudicated: decisive advantage · $0.018Standard as whiteLost vs Skill 0, 10% random moves58 plies · forfeit: no legal move · $0.029Chess960 as whiteLost vs Skill 0, 10% random moves50 plies · checkmate · $0.019Standard as blackWon vs Skill 0, 25% random moves38 plies · adjudicated: decisive advantage · $0.010Chess960 as blackWon vs Skill 0, 25% random moves50 plies · adjudicated: decisive advantage · $0.021Standard as whiteWon vs Skill 0, 25% random moves25 plies · checkmate · $0.0084Chess960 as whiteLost vs Skill 0, 50% random moves22 plies · checkmate · $0.011Standard as blackLost vs Skill 0, 10% random moves78 plies · adjudicated: decisive advantage · $0.030Chess960 as blackWon vs Skill 0, 25% random moves120 plies · adjudicated: decisive advantage · $0.043Standard as whiteLost vs Skill 0, 25% random moves89 plies · adjudicated: decisive advantage · $0.036Chess960 as whiteLost vs Skill 0, 25% random moves46 plies · checkmate · $0.022Standard as blackWon vs Skill 0, 50% random moves44 plies · adjudicated: decisive advantage · $0.016Chess960 as blackWon vs Skill 0, 50% random moves108 plies · adjudicated: decisive advantage · $0.044Standard as whiteLost vs Stockfish 132054 plies · checkmate · $0.022Chess960 as whiteLost vs Skill 0, 10% random moves57 plies · adjudicated: decisive advantage · $0.025Standard as blackWon vs Skill 0, 25% random moves36 plies · adjudicated: decisive advantage · $0.012Chess960 as blackWon vs Skill 0, 25% random moves24 plies · adjudicated: decisive advantage · $0.0100Standard as whiteWon vs Skill 0, 25% random moves73 plies · adjudicated: decisive advantage · $0.028Chess960 as whiteWon vs Skill 0, 50% random moves45 plies · adjudicated: decisive advantage · $0.020Standard as blackLost vs Skill 0, 10% random moves41 plies · checkmate · $0.013Chess960 as blackLost vs Skill 0, 25% random moves13 plies · forfeit: no legal move · $0.0093Standard as whiteWon vs Skill 0, 25% random moves57 plies · adjudicated: decisive advantage · $0.019Chess960 as whiteWon vs Skill 0, 25% random moves43 plies · adjudicated: decisive advantage · $0.018Standard as blackWon vs Skill 0, 50% random moves70 plies · checkmate · $0.028Chess960 as blackWon vs Skill 0, 50% random moves52 plies · adjudicated: decisive advantage · $0.022Standard as whiteLost vs Skill 0, 10% random moves80 plies · forfeit: no legal move · $0.033Chess960 as whiteLost vs Skill 0, 25% random moves67 plies · adjudicated: decisive advantage · $0.033Standard as blackWon vs Skill 0, 25% random moves12 plies · checkmate · $0.0040Chess960 as blackWon vs Skill 0, 50% random moves40 plies · adjudicated: decisive advantage · $0.017Standard as whiteWon vs Skill 0, 25% random moves41 plies · adjudicated: decisive advantage · $0.016Chess960 as whiteWon vs Skill 0, 50% random moves27 plies · adjudicated: decisive advantage · $0.0096Standard as blackLost vs Skill 0, 10% random moves68 plies · adjudicated: decisive advantage · $0.029Chess960 as blackLost vs Skill 0, 25% random moves42 plies · adjudicated: decisive advantage · $0.021Standard as whiteWon vs Skill 0, 25% random moves89 plies · adjudicated: decisive advantage · $0.033Chess960 as whiteWon vs Skill 0, 50% random moves37 plies · adjudicated: decisive advantage · $0.016Standard as blackWon vs Skill 0, 50% random moves40 plies · adjudicated: decisive advantage · $0.016Chess960 as blackWon vs Skill 0, 75% random moves50 plies · adjudicated: decisive advantage · $0.020Standard as whiteWon vs Skill 0, 25% random moves75 plies · adjudicated: decisive advantage · $0.030Chess960 as whiteLost vs Skill 0, 25% random moves113 plies · adjudicated: decisive advantage · $0.041Standard as blackLost vs Skill 0, 25% random moves73 plies · checkmate · $0.023Chess960 as blackLost vs Skill 0, 25% random moves47 plies · checkmate · $0.017Standard as whiteWon vs Skill 0, 50% random moves35 plies · adjudicated: decisive advantage · $0.012Chess960 as whiteWon vs Skill 0, 50% random moves51 plies · adjudicated: decisive advantage · $0.019Standard as blackLost vs Skill 0, 25% random moves33 plies · checkmate · $0.0094Chess960 as blackLost vs Skill 0, 25% random moves46 plies · adjudicated: decisive advantage · $0.018Standard as whiteLost vs Skill 0, 25% random moves85 plies · adjudicated: decisive advantage · $0.032Chess960 as whiteLost vs Skill 0, 25% random moves12 plies · forfeit: no legal move · $0.0085