# Mercury 2 vs MiMo-V2.5

> MiMo-V2.5 is the stronger model overall, scoring 43.4 to 39.1 on the Noometry Index.

- Canonical page: https://noometry.com/compare/mercury-2-vs-mimo-v2-5
- Last updated: 2026-10-12
- Shared benchmarks: 15

## Summary

- They share 15 benchmarks with published results for both. Mercury 2 scores higher in 0 categories and MiMo-V2.5 in 7 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in coding, where MiMo-V2.5 leads 43.9 to 33.5.
- MiMo-V2.5 is cheaper at $0.14 / $0.28 per million input/output tokens, against $0.25 / $0.75 for Mercury 2.
- MiMo-V2.5 accepts more context: 1.05M tokens versus 128K.
- MiMo-V2.5 has downloadable open weights; the other is API-only.

## Snapshot

| | Mercury 2 | MiMo-V2.5 |
|---|---|---|
| Provider | Inception | Xiaomi |
| Noometry Index | 39.1 | 43.4 |
| Rank | 175 | 93 |
| Context | 128K | 1.05M |
| Input $/M | $0.25 | $0.14 |
| Output $/M | $0.75 | $0.28 |
| Weights | Proprietary | Open |

## Coding

- Mercury 2: 33.5 (#255)
- MiMo-V2.5: 43.9 (#81)

| Benchmark | Mercury 2 | MiMo-V2.5 |
|---|---|---|
| LMArena WebDev | 1171 | 1438 |
| SciCode | 38.7% | 43.1% |
| LMArena Coding | 1391 | 1469 |
| ALE-Bench | 785.58 | 513.95 |
| WeirdML | 43.2% | — |

## Reasoning

- Mercury 2: 23.8 (#170)
- MiMo-V2.5: 28.6 (#101)

| Benchmark | Mercury 2 | MiMo-V2.5 |
|---|---|---|
| CritPt | 0.8% | 3.7% |
| LMArena Hard Prompts | 1362 | 1450 |

## Math

- Mercury 2: —
- MiMo-V2.5: 36.8 (#163)

| Benchmark | Mercury 2 | MiMo-V2.5 |
|---|---|---|
| ProofBench | — | 16% |
| LMArena Math | — | 1436 |

## Knowledge

- Mercury 2: 36.2 (#172)
- MiMo-V2.5: 40.8 (#115)

| Benchmark | Mercury 2 | MiMo-V2.5 |
|---|---|---|
| LMArena Expert | 1358 | 1460 |
| Vectara Hallucination Rate | 12.3% | — |

## Multimodal

- Mercury 2: —
- MiMo-V2.5: 39.8 (#54)

| Benchmark | Mercury 2 | MiMo-V2.5 |
|---|---|---|
| LMArena Vision | — | 1247 |

## Multilingual

- Mercury 2: 46.6 (#157)
- MiMo-V2.5: 51.9 (#99)

| Benchmark | Mercury 2 | MiMo-V2.5 |
|---|---|---|
| LMArena Non-English | 1331 | 1404 |
| LMArena Chinese | 1417 | 1468 |
| LMArena Russian | 1304 | 1395 |
| LMArena French | — | 1447 |
| LMArena German | — | 1421 |
| LMArena Japanese | — | 1306 |
| LMArena Korean | — | 1363 |
| LMArena Spanish | — | 1416 |

## Instruction Following

- Mercury 2: 70.2 (#165)
- MiMo-V2.5: 75.5 (#60)

| Benchmark | Mercury 2 | MiMo-V2.5 |
|---|---|---|
| LMArena Instruction Following | 1329 | 1434 |

## Long Context

- Mercury 2: 40.5 (#154)
- MiMo-V2.5: 44.2 (#73)

| Benchmark | Mercury 2 | MiMo-V2.5 |
|---|---|---|
| LMArena Longer Query | 1330 | 1445 |

## Writing & Preference

- Mercury 2: 53.8 (#155)
- MiMo-V2.5: 61.6 (#86)

| Benchmark | Mercury 2 | MiMo-V2.5 |
|---|---|---|
| LMArena Text | 1355 | 1428 |
| LMArena Creative Writing | 1289 | 1393 |
| LMArena Multi-Turn | 1358 | 1445 |

## FAQ

### Is Mercury 2 better than MiMo-V2.5?

MiMo-V2.5 is the stronger model overall, scoring 43.4 to 39.1 on the Noometry Index.

### Which is cheaper, Mercury 2 or MiMo-V2.5?

MiMo-V2.5 is cheaper. It lists at $0.14 per million input tokens and $0.28 per million output tokens; Mercury 2 lists at $0.25 and $0.75.

### Is Mercury 2 or MiMo-V2.5 better for coding?

MiMo-V2.5 scores higher on coding benchmarks: 43.9 versus 33.5 in the Noometry coding category.

### Which has the bigger context window?

MiMo-V2.5 does, with 1.05M tokens against 128K.

### How many benchmarks do Mercury 2 and MiMo-V2.5 share?

15 benchmarks have published results for both models. Mercury 2 has 17 scored results on Noometry and MiMo-V2.5 has 23.