Qwen3.8 27B
Alibaba · open weights · released 2026-08-14 · route qwen3.8:27b · Model profile
Opening gap: +0 (95%: -813 to +813). The interval includes zero, so we can't yet say whether it performs differently across the variants.
Standard
- Rating
- 33295%: -243 to 907
- Record
- 0 won, 0 drawn, 3 lost of 3
- Accuracy (open positions)
- 73.6
- Accuracy (all moves)
- 79.2
- Average centipawn loss
- 123
- Blunders / mistakes / inaccuracies per 100 moves
- 17.1 / 7.3 / 9.8
- Matched Stockfish's first choice
- 34%
- In Stockfish's top three
- 54%
- Legal on the first try
- 81.8%
- Illegal / invalid
- 16 of 57 answers
- Forfeits
- 3
- Adjudicated games
- 0
- API-equivalent cost per game
- n/a
- API-equivalent cost per move
- n/a
- Seconds per move
- 663.8
- Model minutes per game
- 162.3
- Tokens per move (in / out)
- 516 / 3,835
- Reasoning tokens per move
- n/a
- Aborted on our side (not counted)
- 1
By phase
| Phase | Moves | Accuracy | Centipawn loss | Blunders /100 | Engine match |
|---|---|---|---|---|---|
| Opening | 30 | 76.8 | 126 | 16.7 | 30% |
| Middlegame | 11 | 47.6 | 117 | 18.2 | 45% |
| Endgame | 0 | n/a | n/a | n/a | n/a |
Chess960
- Rating
- 33295%: -243 to 907
- Record
- 0 won, 0 drawn, 3 lost of 3
- Accuracy (open positions)
- 67.6
- Accuracy (all moves)
- 67.6
- Average centipawn loss
- 122
- Blunders / mistakes / inaccuracies per 100 moves
- 26.1 / 13.0 / 30.4
- Matched Stockfish's first choice
- 0%
- In Stockfish's top three
- 17%
- Legal on the first try
- 69.2%
- Illegal / invalid
- 16 of 39 answers
- Forfeits
- 3
- Adjudicated games
- 0
- API-equivalent cost per game
- n/a
- API-equivalent cost per move
- n/a
- Seconds per move
- 1,127.8
- Model minutes per game
- 162.9
- Tokens per move (in / out)
- 862 / 6,239
- Reasoning tokens per move
- n/a
- Aborted on our side (not counted)
- 0
By phase
| Phase | Moves | Accuracy | Centipawn loss | Blunders /100 | Engine match |
|---|---|---|---|---|---|
| Opening | 23 | 67.6 | 122 | 26.1 | 0% |
| Middlegame | 0 | n/a | n/a | n/a | n/a |
| Endgame | 0 | n/a | n/a | n/a | n/a |
Games
Standard as whiteLost vs Skill 0, 50% random moves30 plies · forfeit: no legal move · localChess960 as whiteLost vs Skill 0, 50% random moves20 plies · forfeit: no legal move · localStandard as blackLost vs Skill 0, 10% random moves29 plies · forfeit: no legal move · localChess960 as blackLost vs Skill 0, 10% random moves19 plies · forfeit: no legal move · localStandard as whiteLost vs Skill 0, 10% random moves24 plies · forfeit: no legal move · localChess960 as whiteLost vs Skill 0, 10% random moves8 plies · forfeit: no legal move · local