Qwen 3.5 Plus (hosted 397B-A17B)
ECI#62
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 62nd of 249 tracked models. At the time of its release, it ranked 16th of 185 tracked models.
Qwen 3.5 Plus (hosted 397B-A17B) vs select alternatives
| Domain | Benchmark | Qwen 3.5 Plus (hosted 397B-A17B) | |||
|---|---|---|---|---|---|
ECI scoreBest score 166 | 147 | 144 | 147 | 147 | |
| Ranking | #62 | #85 | #59 | #63 | |
| Agent | Vending-Bench 2Best score $11,182 | $1 | -$11 | — | -$23 |
APEX-AgentsBest score 47% | |||||
| 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 1797 | 1399 | — | — | 1384 |
ALE-BenchBest score 2177 | 622 | — | — | 618 | |
| World knowledge | SimpleQA VerifiedBest score 76% |
