Compare / Qwen3.5 Plus 2026-02-15 vs GPT-5.1
Qwen3.5 Plus 2026-02-15 vs GPT-5.1
4 results from 3 sources that measured both models. Each row is in the source's own units; there is no overall winner.
| Benchmark | Metric | Qwen3.5 Plus 2026-02-15 | GPT-5.1 |
|---|---|---|---|
| SimpleQA Verified (Epoch AI)reported | Correct answers% of questions | 25.4% | 48.0% |
| Vectara Hallucination Leaderboardreported | Answer rate% of documents | 99.8% | 100.0% |
| Vectara Hallucination Leaderboardreported | Hallucination rate% of summaries | 10.7% | 10.9% |
| Vending-Bench 2reported | Money after a yearUS dollars | $0.54 | $1,473.43 |
Bold green marks the better value on that metric. Where a source reports ranges that overlap, the difference may not be meaningful; see the benchmark page for ranges.