Model comparison
Mercury 2 vs MiMo-V2.5-Pro
MiMo-V2.5-Pro is the stronger model overall, scoring 44.8 to 38.8 on the Noometry Index.
Last verified . 15 shared benchmarks.
Summary
- They share 15 benchmarks with published results for both. Mercury 2 scores higher in 0 categories and MiMo-V2.5-Pro in 7 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in coding, where MiMo-V2.5-Pro leads 47.0 to 33.2.
- The biggest single-benchmark swing is SciCode: 38.7% for Mercury 2 and 50.2% for MiMo-V2.5-Pro.
- Mercury 2 is cheaper at $0.25 / $0.75 per million input/output tokens, against $0.43 / $0.87 for MiMo-V2.5-Pro.
- MiMo-V2.5-Pro accepts more context: 1.05M tokens versus 128K.
- MiMo-V2.5-Pro has downloadable open weights; the other is API-only.
Side by side
| Mercury 2 | MiMo-V2.5-Pro | |
|---|---|---|
| Provider | Inception | Xiaomi |
| Noometry Index | 38.8 | 44.8 |
| Released | 2026-02-20 | 2026-04-22 |
| Weights | Proprietary | Open |
| Context window | 128K | 1.05M |
| Max output | 50K | 131K |
| Input $ / M tokens | $0.25 | $0.43 |
| Output $ / M tokens | $0.75 | $0.87 |
| Results tracked | 17 | 27 |
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Category by category
Coding MiMo-V2.5-Pro leads
Mercury 2: 33.2 (#250), MiMo-V2.5-Pro: 47.0 (#58)
| Benchmark | Mercury 2 | MiMo-V2.5-Pro |
|---|---|---|
| LMArena WebDev | 1170 | 1477 |
| SciCode | 38.7% | 50.2% |
| LMArena Coding | 1391 | 1502 |
| ALE-Bench | 785.58 | 899.8 |
| WeirdML | 43.2% | — |
Reasoning MiMo-V2.5-Pro leads
Mercury 2: 23.0 (#170), MiMo-V2.5-Pro: 25.9 (#124)
| Benchmark | Mercury 2 | MiMo-V2.5-Pro |
|---|---|---|
| CritPt | 0.8% | 4% |
| LMArena Hard Prompts | 1362 | 1487 |
| NYT Connections (extended) | — | 34.4% |
| DTBench | — | 84.5% |
| LMCA | — | 29.5% |
Math Not comparable
Mercury 2: —, MiMo-V2.5-Pro: 38.6 (#84)
| Benchmark | Mercury 2 | MiMo-V2.5-Pro |
|---|---|---|
| ProofBench | — | 22% |
| LMArena Math | — | 1480 |
Knowledge MiMo-V2.5-Pro leads
Mercury 2: 35.6 (#170), MiMo-V2.5-Pro: 41.5 (#100)
| Benchmark | Mercury 2 | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Expert | 1358 | 1501 |
| Vectara Hallucination Rate | 12.3% | — |
Multilingual MiMo-V2.5-Pro leads
Mercury 2: 46.8 (#153), MiMo-V2.5-Pro: 55.3 (#33)
| Benchmark | Mercury 2 | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Non-English | 1331 | 1449 |
| LMArena Chinese | 1416 | 1507 |
| LMArena Russian | 1303 | 1450 |
| LMArena French | — | 1489 |
| LMArena German | — | 1455 |
| LMArena Japanese | — | 1418 |
| LMArena Korean | — | 1436 |
| LMArena Spanish | — | 1470 |
Instruction Following MiMo-V2.5-Pro leads
Mercury 2: 70.4 (#161), MiMo-V2.5-Pro: 77.6 (#21)
| Benchmark | Mercury 2 | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Instruction Following | 1328 | 1477 |
Long Context MiMo-V2.5-Pro leads
Mercury 2: 40.4 (#149), MiMo-V2.5-Pro: 45.4 (#38)
| Benchmark | Mercury 2 | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Longer Query | 1329 | 1482 |
Writing & Preference MiMo-V2.5-Pro leads
Mercury 2: 54.0 (#151), MiMo-V2.5-Pro: 65.5 (#47)
| Benchmark | Mercury 2 | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Text | 1355 | 1465 |
| LMArena Creative Writing | 1289 | 1440 |
| LMArena Multi-Turn | 1358 | 1477 |
| EQ-Bench Creative Writing | — | 1493 |
| EQ-Bench 4 | — | 1208 |
Frequently asked questions
Is Mercury 2 better than MiMo-V2.5-Pro?
MiMo-V2.5-Pro is the stronger model overall, scoring 44.8 to 38.8 on the Noometry Index.
Which is cheaper, Mercury 2 or MiMo-V2.5-Pro?
Mercury 2 is cheaper. It lists at $0.25 per million input tokens and $0.75 per million output tokens; MiMo-V2.5-Pro lists at $0.43 and $0.87.
Is Mercury 2 or MiMo-V2.5-Pro better for coding?
MiMo-V2.5-Pro scores higher on coding benchmarks: 47.0 versus 33.2 in the Noometry coding category.
Which has the bigger context window?
MiMo-V2.5-Pro does, with 1.05M tokens against 128K.
How many benchmarks do Mercury 2 and MiMo-V2.5-Pro share?
15 benchmarks have published results for both models. Mercury 2 has 17 scored results on Noometry and MiMo-V2.5-Pro has 27.