Qwen 3.5 Plus (hosted 397B-A17B)
ECI#71
147Qwen 3.5 Plus (hosted 397B-A17B) is a closed-weights model from Alibaba, released February 16, 2026. It has an ECI score of 147 and ranks 71st of 257 tracked models. At the time of its release, it ranked 15th of 184 tracked models.
Qwen 3.5 Plus (hosted 397B-A17B) vs select alternatives
| Domain | Benchmark | Qwen 3.5 Plus (hosted 397B-A17B) | |||
|---|---|---|---|---|---|
ECI scoreBest score 167 | 147 | 147 | 146 | 146 | |
| Ranking | #71 | #73 | #81 | #82 | |
| Agent | Vending-Bench 2Best score $15,515 | $1 | — | $4,432 | — |
| Conceptual reasoning | LMCABest score 68.2 | 36.4 | 37.9 | — | 36.9 |
| Games | Chess PuzzlesBest score 72% | ||||
Mystery Game PuzzlesBest score 84% | |||||
| Mathematics | OTIS Mock AIME 2024-2025Best score 100% | ||||
| Science | GPQA DiamondBest score 96% | ||||
| Software engineering | Text Arena (Coding)Best score 1820 | 1399 | — | 1436 | — |
ALE-BenchBest score 2951 | 622 | — | 766 | 1005 | |
| World knowledge | SimpleQA VerifiedBest score 76% |
