GPT-6.1 Terra
Openai · released 2026-10-26 · route gpt-6.1-terra · Model profile
Opening gap: +126 (95%: -98 to +350). The interval includes zero, so we can't yet say whether it performs differently across the variants.
Standard
- Rating
- 1,17095%: 1,009 to 1,332
- Record
- 12 won, 0 drawn, 12 lost of 24
- Accuracy (open positions)
- 86.5
- Accuracy (all moves)
- 89.1
- Average centipawn loss
- 63
- Blunders / mistakes / inaccuracies per 100 moves
- 5.5 / 2.9 / 9.8
- Matched Stockfish's first choice
- 35%
- In Stockfish's top three
- 64%
- Legal on the first try
- 98.0%
- Illegal / invalid
- 16 of 815 answers
- Forfeits
- 0
- Adjudicated games
- 16
- API-equivalent cost per game
- $0.107
- API-equivalent cost per move
- $0.0032
- Seconds per move
- 7.0
- Model minutes per game
- 3.9
- Tokens per move (in / out)
- 10,337 / 276
- Reasoning tokens per move
- 262
- Aborted on our side (not counted)
- 0
By phase
| Phase | Moves | Accuracy | Centipawn loss | Blunders /100 | Engine match |
|---|---|---|---|---|---|
| Opening | 240 | 93.9 | 21 | 2.1 | 49% |
| Middlegame | 368 | 80.7 | 87 | 9.0 | 29% |
| Endgame | 191 | 85.9 | 68 | 3.1 | 29% |
Chess960
- Rating
- 1,04595%: 889 to 1,200
- Record
- 11 won, 1 drawn, 12 lost of 24
- Accuracy (open positions)
- 80.6
- Accuracy (all moves)
- 86.5
- Average centipawn loss
- 78
- Blunders / mistakes / inaccuracies per 100 moves
- 7.5 / 5.5 / 10.2
- Matched Stockfish's first choice
- 26%
- In Stockfish's top three
- 49%
- Legal on the first try
- 96.2%
- Illegal / invalid
- 24 of 661 answers
- Forfeits
- 0
- Adjudicated games
- 16
- API-equivalent cost per game
- $0.106
- API-equivalent cost per move
- $0.0040
- Seconds per move
- 8.8
- Model minutes per game
- 3.9
- Tokens per move (in / out)
- 10,538 / 420
- Reasoning tokens per move
- 405
- Aborted on our side (not counted)
- 0
By phase
| Phase | Moves | Accuracy | Centipawn loss | Blunders /100 | Engine match |
|---|---|---|---|---|---|
| Opening | 238 | 76.8 | 88 | 12.6 | 19% |
| Middlegame | 278 | 81.2 | 80 | 5.8 | 30% |
| Endgame | 121 | 92.5 | 56 | 1.6 | 31% |
Games
Chess960 as blackWon vs Skill 0, 25% random moves34 plies · adjudicated: decisive advantage · $0.066Standard as blackWon vs Skill 0, 25% random moves30 plies · adjudicated: decisive advantage · $0.038Standard as whiteLost vs Stockfish 150086 plies · checkmate · $0.122Standard as blackWon vs Skill 0, 10% random moves106 plies · adjudicated: decisive advantage · $0.159Chess960 as whiteLost vs Stockfish 132079 plies · adjudicated: decisive advantage · $0.131Chess960 as blackWon vs Skill 0, 10% random moves46 plies · adjudicated: decisive advantage · $0.077Chess960 as blackDrew vs Skill 0, 10% random moves120 plies · adjudicated: dead level · $0.211Standard as whiteWon vs Skill 0, 10% random moves43 plies · adjudicated: decisive advantage · $0.054Chess960 as whiteLost vs Skill 0, 25% random moves20 plies · checkmate · $0.035Standard as blackLost vs Stockfish 132060 plies · adjudicated: decisive advantage · $0.092Standard as whiteWon vs Skill 0, 10% random moves57 plies · adjudicated: decisive advantage · $0.091Chess960 as whiteWon vs Skill 0, 10% random moves29 plies · checkmate · $0.048Standard as whiteLost vs Stockfish 1500129 plies · adjudicated: decisive advantage · $0.201Standard as blackWon vs Skill 0, 25% random moves26 plies · adjudicated: decisive advantage · $0.040Chess960 as blackLost vs Skill 0, 25% random moves61 plies · checkmate · $0.130Chess960 as whiteLost vs Stockfish Skill 082 plies · checkmate · $0.150Standard as whiteLost vs Skill 0, 10% random moves68 plies · checkmate · $0.109Chess960 as blackWon vs Skill 0, 10% random moves38 plies · adjudicated: decisive advantage · $0.076Standard as blackWon vs Skill 0, 10% random moves46 plies · checkmate · $0.056Chess960 as whiteLost vs Skill 0, 25% random moves35 plies · adjudicated: decisive advantage · $0.078Standard as blackLost vs Stockfish 132073 plies · checkmate · $0.107Chess960 as blackWon vs Skill 0, 10% random moves72 plies · adjudicated: decisive advantage · $0.151Chess960 as whiteWon vs Skill 0, 10% random moves61 plies · adjudicated: decisive advantage · $0.114Standard as whiteWon vs Skill 0, 10% random moves39 plies · adjudicated: decisive advantage · $0.048Standard as blackWon vs Skill 0, 25% random moves38 plies · adjudicated: decisive advantage · $0.052Standard as whiteWon vs Stockfish Skill 063 plies · adjudicated: decisive advantage · $0.103Chess960 as blackWon vs Skill 0, 25% random moves36 plies · adjudicated: decisive advantage · $0.066Chess960 as whiteLost vs Stockfish 132084 plies · checkmate · $0.171Standard as whiteLost vs Skill 0, 10% random moves110 plies · checkmate · $0.230Standard as blackLost vs Skill 0, 10% random moves91 plies · checkmate · $0.137Chess960 as blackWon vs Skill 0, 10% random moves38 plies · adjudicated: decisive advantage · $0.064Standard as whiteLost vs Stockfish 132099 plies · adjudicated: decisive advantage · $0.196Chess960 as whiteLost vs Skill 0, 10% random moves16 plies · checkmate · $0.022Chess960 as whiteLost vs Skill 0, 10% random moves67 plies · adjudicated: decisive advantage · $0.139Standard as blackWon vs Stockfish 132054 plies · checkmate · $0.064Chess960 as blackLost vs Stockfish 132030 plies · adjudicated: decisive advantage · $0.065Standard as blackLost vs Skill 0, 10% random moves68 plies · adjudicated: decisive advantage · $0.106Chess960 as blackWon vs Skill 0, 25% random moves36 plies · adjudicated: decisive advantage · $0.090Standard as whiteLost vs Stockfish 170065 plies · adjudicated: decisive advantage · $0.111Chess960 as whiteLost vs Stockfish 132046 plies · checkmate · $0.105Standard as blackLost vs Stockfish 132068 plies · adjudicated: decisive advantage · $0.115Chess960 as blackWon vs Skill 0, 10% random moves50 plies · adjudicated: decisive advantage · $0.114Chess960 as whiteLost vs Stockfish 132068 plies · checkmate · $0.122Standard as whiteWon vs Skill 0, 10% random moves69 plies · adjudicated: decisive advantage · $0.105Chess960 as blackLost vs Skill 0, 10% random moves58 plies · adjudicated: decisive advantage · $0.149Standard as blackLost vs Stockfish Skill 264 plies · adjudicated: decisive advantage · $0.121Chess960 as whiteWon vs Skill 0, 10% random moves63 plies · adjudicated: decisive advantage · $0.165Standard as whiteWon vs Skill 0, 10% random moves39 plies · checkmate · $0.110