Qwen 3.5 Plus (hosted 397B-A17B)
ECI#82
146Qwen 3.5 Plus (hosted 397B-A17B) is a closed-weights model from Alibaba, released February 16, 2026. It has an ECI score of 146 and ranks 82nd of 254 tracked models. At the time of its release, it ranked 17th of 173 tracked models.
Qwen 3.5 Plus (hosted 397B-A17B) vs select alternatives
| Domain | Benchmark | Qwen 3.5 Plus (hosted 397B-A17B) | |||
|---|---|---|---|---|---|
ECI scoreBest score 169 | 146 | 144 | 147 | 146 | |
| Ranking | #82 | #101 | #77 | #85 | |
| Agent | Vending-Bench 2Best score $16,484 | $1 | -$11 | — | — |
| Conceptual reasoning | LMCABest score 68.3 | 36.4 | 29.3 | 37.9 | 36.9 |
DTBenchBest score 99% | |||||
| Games | Chess PuzzlesBest score 76% | ||||
Mystery Game PuzzlesBest score 84% | |||||
| Mathematics | OTIS Mock AIME 2024-2025Best score 100% | ||||
| Science | GPQA DiamondBest score 96% | ||||
| Software engineering | ALE-BenchBest score 2951 | 622 | — | — | 1005 |
| World knowledge | SimpleQA VerifiedBest score 76% |
