Model comparison
Mercury 2.5 vs MiMo-V2.5
MiMo-V2.5 is the stronger model overall, scoring 43.4 to 33.5 on the Noometry Index. Mercury 2.5 costs 2.6× less per token, which makes it the better buy when MiMo-V2.5's lead doesn't matter for your workload.
Last verified . 4 shared benchmarks.
Summary
- They share 4 benchmarks with published results for both. Mercury 2.5 scores higher in 0 categories and MiMo-V2.5 in 3 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in math, where MiMo-V2.5 leads 36.8 to 23.3.
- The biggest single-benchmark swing is ProofBench: 3% for Mercury 2.5 and 16% for MiMo-V2.5.
- Mercury 2.5 is cheaper at $0.04 / $0.15 per million input/output tokens, against $0.14 / $0.28 for MiMo-V2.5.
- MiMo-V2.5 accepts more context: 1.05M tokens versus 260K.
- MiMo-V2.5 has downloadable open weights; the other is API-only.
Side by side
| Mercury 2.5 | MiMo-V2.5 | |
|---|---|---|
| Provider | Inception | Xiaomi |
| Noometry Index | 33.5 | 43.4 |
| Released | 2026-09-08 | 2026-04-22 |
| Weights | Proprietary | Open |
| Context window | 260K | 1.05M |
| Max output | 66K | 131K |
| Input $ / M tokens | $0.04 | $0.14 |
| Output $ / M tokens | $0.15 | $0.28 |
| Results tracked | 4 | 23 |
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Category by category
Coding MiMo-V2.5 leads
Mercury 2.5: 39.5 (#156), MiMo-V2.5: 43.9 (#81)
| Benchmark | Mercury 2.5 | MiMo-V2.5 |
|---|---|---|
| SciCode | 38.5% | 43.1% |
| ALE-Bench | 301.65 | 513.95 |
| LMArena WebDev | — | 1438 |
| LMArena Coding | — | 1469 |
Reasoning MiMo-V2.5 leads
Mercury 2.5: 22.4 (#193), MiMo-V2.5: 28.6 (#101)
| Benchmark | Mercury 2.5 | MiMo-V2.5 |
|---|---|---|
| CritPt | 0% | 3.7% |
| LMArena Hard Prompts | — | 1450 |
Math MiMo-V2.5 leads
Mercury 2.5: 23.3 (#272), MiMo-V2.5: 36.8 (#163)
| Benchmark | Mercury 2.5 | MiMo-V2.5 |
|---|---|---|
| ProofBench | 3% | 16% |
| LMArena Math | — | 1436 |
Knowledge Not comparable
Mercury 2.5: —, MiMo-V2.5: 40.8 (#115)
| Benchmark | Mercury 2.5 | MiMo-V2.5 |
|---|---|---|
| LMArena Expert | — | 1460 |
Multimodal Not comparable
Mercury 2.5: —, MiMo-V2.5: 39.8 (#54)
| Benchmark | Mercury 2.5 | MiMo-V2.5 |
|---|---|---|
| LMArena Vision | — | 1247 |
Multilingual Not comparable
Mercury 2.5: —, MiMo-V2.5: 51.9 (#99)
| Benchmark | Mercury 2.5 | MiMo-V2.5 |
|---|---|---|
| LMArena Non-English | — | 1404 |
| LMArena Chinese | — | 1468 |
| LMArena French | — | 1447 |
| LMArena German | — | 1421 |
| LMArena Japanese | — | 1306 |
| LMArena Korean | — | 1363 |
| LMArena Russian | — | 1395 |
| LMArena Spanish | — | 1416 |
Instruction Following Not comparable
Mercury 2.5: —, MiMo-V2.5: 75.5 (#60)
| Benchmark | Mercury 2.5 | MiMo-V2.5 |
|---|---|---|
| LMArena Instruction Following | — | 1434 |
Long Context Not comparable
Mercury 2.5: —, MiMo-V2.5: 44.2 (#73)
| Benchmark | Mercury 2.5 | MiMo-V2.5 |
|---|---|---|
| LMArena Longer Query | — | 1445 |
Writing & Preference Not comparable
Mercury 2.5: —, MiMo-V2.5: 61.6 (#86)
| Benchmark | Mercury 2.5 | MiMo-V2.5 |
|---|---|---|
| LMArena Text | — | 1428 |
| LMArena Creative Writing | — | 1393 |
| LMArena Multi-Turn | — | 1445 |
Frequently asked questions
Is Mercury 2.5 better than MiMo-V2.5?
MiMo-V2.5 is the stronger model overall, scoring 43.4 to 33.5 on the Noometry Index. Mercury 2.5 costs 2.6× less per token, which makes it the better buy when MiMo-V2.5's lead doesn't matter for your workload.
Which is cheaper, Mercury 2.5 or MiMo-V2.5?
Mercury 2.5 is cheaper. It lists at $0.04 per million input tokens and $0.15 per million output tokens; MiMo-V2.5 lists at $0.14 and $0.28.
Is Mercury 2.5 or MiMo-V2.5 better for coding?
MiMo-V2.5 scores higher on coding benchmarks: 43.9 versus 39.5 in the Noometry coding category.
Which has the bigger context window?
MiMo-V2.5 does, with 1.05M tokens against 260K.
How many benchmarks do Mercury 2.5 and MiMo-V2.5 share?
4 benchmarks have published results for both models. Mercury 2.5 has 4 scored results on Noometry and MiMo-V2.5 has 23.