Qwen3.8 Flash-Next
Alibaba · open weights · released 2026-08-26 · route qwen3.8-flash-next · Model profile
Opening gap: -47 (95%: -560 to +466). The interval includes zero, so we can't yet say whether it performs differently across the variants.
Standard
- Rating
- 41195%: 74 to 748
- Record
- 2 won, 0 drawn, 4 lost of 6
- Accuracy (open positions)
- 73.4
- Accuracy (all moves)
- 79.8
- Average centipawn loss
- 134
- Blunders / mistakes / inaccuracies per 100 moves
- 15.9 / 4.8 / 10.3
- Matched Stockfish's first choice
- 27%
- In Stockfish's top three
- 49%
- Legal on the first try
- 83.7%
- Illegal / invalid
- 32 of 177 answers
- Forfeits
- 2
- Adjudicated games
- 3
- API-equivalent cost per game
- n/a
- API-equivalent cost per move
- n/a
- Seconds per move
- 260.7
- Model minutes per game
- 106.5
- Tokens per move (in / out)
- 440 / 4,237
- Reasoning tokens per move
- n/a
- Aborted on our side (not counted)
- 323
By phase
| Phase | Moves | Accuracy | Centipawn loss | Blunders /100 | Engine match |
|---|---|---|---|---|---|
| Opening | 60 | 83.7 | 99 | 11.7 | 42% |
| Middlegame | 55 | 63.4 | 144 | 20.0 | 18% |
| Endgame | 30 | 48.7 | 185 | 16.7 | 13% |
Chess960
- Rating
- 45895%: 71 to 844
- Record
- 1 won, 0 drawn, 5 lost of 6
- Accuracy (open positions)
- 71.1
- Accuracy (all moves)
- 80.0
- Average centipawn loss
- 154
- Blunders / mistakes / inaccuracies per 100 moves
- 14.5 / 5.8 / 13.8
- Matched Stockfish's first choice
- 24%
- In Stockfish's top three
- 45%
- Legal on the first try
- 76.3%
- Illegal / invalid
- 36 of 174 answers
- Forfeits
- 1
- Adjudicated games
- 3
- API-equivalent cost per game
- n/a
- API-equivalent cost per move
- n/a
- Seconds per move
- 310.2
- Model minutes per game
- 119.8
- Tokens per move (in / out)
- 542 / 5,349
- 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 | 52 | 73.4 | 120 | 21.1 | 21% |
| Middlegame | 51 | 58.5 | 214 | 11.8 | 22% |
| Endgame | 35 | 72.0 | 116 | 8.6 | 31% |
Games
Standard as blackWon vs Skill 0, 75% random moves54 plies · adjudicated: decisive advantage · localChess960 as blackLost vs Skill 0, 50% random moves13 plies · forfeit: no legal move · localStandard as whiteWon vs Skill 0, 50% random moves33 plies · adjudicated: decisive advantage · localChess960 as whiteLost vs Skill 0, 10% random moves59 plies · adjudicated: decisive advantage · localStandard as blackLost vs Skill 0, 50% random moves29 plies · forfeit: no legal move · localChess960 as blackLost vs Skill 0, 25% random moves13 plies · checkmate · localStandard as whiteLost vs Skill 0, 50% random moves80 plies · forfeit: no legal move · localChess960 as whiteWon vs Skill 0, 50% random moves93 plies · adjudicated: decisive advantage · localStandard as blackLost vs Skill 0, 10% random moves43 plies · checkmate · localChess960 as blackLost vs Skill 0, 10% random moves31 plies · checkmate · localStandard as whiteLost vs Skill 0, 10% random moves51 plies · adjudicated: decisive advantage · localChess960 as whiteLost vs Skill 0, 10% random moves67 plies · adjudicated: decisive advantage · local