Qwen3.8 27B
Alibaba · open weights · released 2026-08-14 · route qwen3.8:27b · Model profile
Opening gap: +97 (95%: -845 to +1,039). The interval includes zero, so we can't yet say whether it performs differently across the variants.
Standard
- Rating
- 80995%: 110 to 1,509
- Record
- 0 won, 0 drawn, 1 lost of 1
- Accuracy (open positions)
- 73.1
- Accuracy (all moves)
- 77.3
- Average centipawn loss
- 162
- Blunders / mistakes / inaccuracies per 100 moves
- 16.7 / 16.7 / 0.0
- Matched Stockfish's first choice
- 42%
- In Stockfish's top three
- 67%
- Legal on the first try
- 92.3%
- Illegal / invalid
- 3 of 15 answers
- Forfeits
- 1
- Adjudicated games
- 0
- API-equivalent cost per game
- n/a
- API-equivalent cost per move
- n/a
- Seconds per move
- 735.5
- Model minutes per game
- 159.4
- Tokens per move (in / out)
- 292 / 2,589
- 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 | 10 | 73.1 | 191 | 20.0 | 40% |
| Middlegame | 2 | n/a | 17 | 0.0 | 50% |
| Endgame | 0 | n/a | n/a | n/a | n/a |
Chess960
- Rating
- 71395%: 82 to 1,343
- Record
- 0 won, 0 drawn, 2 lost of 2
- Accuracy (open positions)
- 65.7
- Accuracy (all moves)
- 65.7
- Average centipawn loss
- 115
- Blunders / mistakes / inaccuracies per 100 moves
- 23.1 / 23.1 / 38.5
- Matched Stockfish's first choice
- 0%
- In Stockfish's top three
- 23%
- Legal on the first try
- 53.3%
- Illegal / invalid
- 13 of 26 answers
- Forfeits
- 2
- Adjudicated games
- 0
- API-equivalent cost per game
- n/a
- API-equivalent cost per move
- n/a
- Seconds per move
- 1,440.0
- Model minutes per game
- 180.0
- Tokens per move (in / out)
- 1,088 / 5,847
- 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 | 13 | 65.7 | 115 | 23.1 | 0% |
| Middlegame | 0 | n/a | n/a | n/a | n/a |
| Endgame | 0 | n/a | n/a | n/a | n/a |