Model comparison
Mercury 2 vs Qwen2.5 Plus 1127
Mercury 2 and Qwen2.5 Plus 1127 score almost the same on the Noometry Index (38.8 vs 38.1), so choose on price, context window or the category you care about most.
Last verified . 11 shared benchmarks.
Alibaba (Qwen)Summary
- They share 11 benchmarks with published results for both. Mercury 2 scores higher in 5 categories and Qwen2.5 Plus 1127 in 2 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in multilingual, where Mercury 2 leads 46.8 to 42.1.
Side by side
| Mercury 2 | Qwen2.5 Plus 1127 | |
|---|---|---|
| Provider | Inception | Alibaba (Qwen) |
| Noometry Index | 38.8 | 38.1 |
| Released | 2026-02-20 | — |
| Weights | Proprietary | Proprietary |
| Context window | 128K | — |
| Max output | 50K | — |
| Input $ / M tokens | $0.25 | — |
| Output $ / M tokens | $0.75 | — |
| Results tracked | 17 | 14 |
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Category by category
Coding Qwen2.5 Plus 1127 leads
Mercury 2: 33.2 (#250), Qwen2.5 Plus 1127: 37.9 (#171)
| Benchmark | Mercury 2 | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Coding | 1391 | 1314 |
| LMArena WebDev | 1170 | — |
| SciCode | 38.7% | — |
| WeirdML | 43.2% | — |
| ALE-Bench | 785.58 | — |
Reasoning Qwen2.5 Plus 1127 leads
Mercury 2: 23.0 (#170), Qwen2.5 Plus 1127: 24.8 (#139)
| Benchmark | Mercury 2 | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Hard Prompts | 1362 | 1299 |
| CritPt | 0.8% | — |
Math Not comparable
Mercury 2: —, Qwen2.5 Plus 1127: 33.5 (#175)
| Benchmark | Mercury 2 | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Math | — | 1298 |
Knowledge Too close to call
Mercury 2: 35.6 (#170), Qwen2.5 Plus 1127: 34.9 (#179)
| Benchmark | Mercury 2 | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Expert | 1358 | 1289 |
| Vectara Hallucination Rate | 12.3% | — |
Multilingual Mercury 2 leads
Mercury 2: 46.8 (#153), Qwen2.5 Plus 1127: 42.1 (#196)
| Benchmark | Mercury 2 | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Non-English | 1331 | 1265 |
| LMArena Chinese | 1416 | 1314 |
| LMArena Russian | 1303 | 1271 |
| LMArena German | — | 1231 |
| LMArena Japanese | — | 1207 |
Instruction Following Mercury 2 leads
Mercury 2: 70.4 (#161), Qwen2.5 Plus 1127: 67.4 (#194)
| Benchmark | Mercury 2 | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Instruction Following | 1328 | 1275 |
Long Context Mercury 2 leads
Mercury 2: 40.4 (#149), Qwen2.5 Plus 1127: 39.2 (#180)
| Benchmark | Mercury 2 | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Longer Query | 1329 | 1292 |
Writing & Preference Mercury 2 leads
Mercury 2: 54.0 (#151), Qwen2.5 Plus 1127: 49.5 (#186)
| Benchmark | Mercury 2 | Qwen2.5 Plus 1127 |
|---|---|---|
| LMArena Text | 1355 | 1299 |
| LMArena Creative Writing | 1289 | 1262 |
| LMArena Multi-Turn | 1358 | 1299 |
Frequently asked questions
Is Mercury 2 better than Qwen2.5 Plus 1127?
Mercury 2 and Qwen2.5 Plus 1127 score almost the same on the Noometry Index (38.8 vs 38.1), so choose on price, context window or the category you care about most.
Is Mercury 2 or Qwen2.5 Plus 1127 better for coding?
Qwen2.5 Plus 1127 scores higher on coding benchmarks: 37.9 versus 33.2 in the Noometry coding category.
How many benchmarks do Mercury 2 and Qwen2.5 Plus 1127 share?
11 benchmarks have published results for both models. Mercury 2 has 17 scored results on Noometry and Qwen2.5 Plus 1127 has 14.