# GPT-5.4 nano vs MiMo-V2.5

> MiMo-V2.5 is the stronger model overall, scoring 43.0 to 41.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-5-4-nano-vs-mimo-v2-5
- Last updated: 2026-10-10
- Shared benchmarks: 22

## Summary

- They share 22 benchmarks with published results for both. GPT-5.4 nano scores higher in 2 categories and MiMo-V2.5 in 7 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where MiMo-V2.5 leads 61.8 to 55.9.
- The biggest single-benchmark swing is ProofBench: 5% for GPT-5.4 nano and 16% for MiMo-V2.5.
- MiMo-V2.5 is cheaper at $0.14 / $0.28 per million input/output tokens, against $0.20 / $1.25 for GPT-5.4 nano.
- MiMo-V2.5 accepts more context: 1.05M tokens versus 400K.
- MiMo-V2.5 has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-5.4 nano | MiMo-V2.5 |
|---|---|---|
| Provider | OpenAI | Xiaomi |
| Noometry Index | 41.9 | 43.0 |
| Rank | 111 | 89 |
| Context | 400K | 1.05M |
| Input $/M | $0.20 | $0.14 |
| Output $/M | $1.25 | $0.28 |
| Weights | Proprietary | Open |

## Coding

- GPT-5.4 nano: 43.1 (#82)
- MiMo-V2.5: 43.6 (#75)

| Benchmark | GPT-5.4 nano | MiMo-V2.5 |
|---|---|---|
| SciCode | 46.9% | 43.1% |
| LMArena Coding | 1404 | 1469 |
| ALE-Bench | 1,005 | 513.95 |
| LMArena WebDev | — | 1438 |
| WeirdML | 49.2% | — |

## Reasoning

- GPT-5.4 nano: 23.8 (#159)
- MiMo-V2.5: 27.8 (#98)

| Benchmark | GPT-5.4 nano | MiMo-V2.5 |
|---|---|---|
| CritPt | 9.3% | 3.7% |
| LMArena Hard Prompts | 1380 | 1450 |
| ARC-AGI-2 | 5.7% | — |
| Kagi LLM Benchmark | 39.7% | — |
| ARC-AGI-1 | 51.5% | — |
| Chess Puzzles | 30% | — |
| Mystery Game Puzzles | 9% | — |
| DTBench | 80.3% | — |
| LMCA | 36.9% | — |
| Epoch Capabilities Index | 145.78 | — |
| ForecastBench | 57.3 | — |

## Math

- GPT-5.4 nano: 40.7 (#76)
- MiMo-V2.5: 35.4 (#145)

| Benchmark | GPT-5.4 nano | MiMo-V2.5 |
|---|---|---|
| ProofBench | 5% | 16% |
| LMArena Math | 1406 | 1436 |
| FrontierMath (Tiers 1-3) | 44.9% | — |
| FrontierMath Tier 4 | 12.2% | — |
| OTIS Mock AIME 2024-2025 | 87.8% | — |
| FrontierMath (Feb 2025 set) | 25.9% | — |
| FrontierMath Tier 4 (v1) | 6.3% | — |

## Knowledge

- GPT-5.4 nano: 41.8 (#94)
- MiMo-V2.5: 40.2 (#109)

| Benchmark | GPT-5.4 nano | MiMo-V2.5 |
|---|---|---|
| LMArena Expert | 1397 | 1459 |
| GPQA Diamond | 78.5% | — |
| SimpleQA Verified | 11.7% | — |
| Vectara Hallucination Rate | 3.1% | — |

## Multimodal

- GPT-5.4 nano: 36.0 (#73)
- MiMo-V2.5: 39.0 (#53)

| Benchmark | GPT-5.4 nano | MiMo-V2.5 |
|---|---|---|
| LMArena Vision | 1196 | 1245 |

## Multilingual

- GPT-5.4 nano: 48.8 (#136)
- MiMo-V2.5: 52.0 (#96)

| Benchmark | GPT-5.4 nano | MiMo-V2.5 |
|---|---|---|
| LMArena Non-English | 1359 | 1404 |
| LMArena Chinese | 1391 | 1467 |
| LMArena French | 1396 | 1447 |
| LMArena German | 1368 | 1421 |
| LMArena Japanese | 1342 | 1304 |
| LMArena Korean | 1321 | 1363 |
| LMArena Russian | 1363 | 1395 |
| LMArena Spanish | 1368 | 1412 |

## Instruction Following

- GPT-5.4 nano: 72.1 (#139)
- MiMo-V2.5: 75.7 (#55)

| Benchmark | GPT-5.4 nano | MiMo-V2.5 |
|---|---|---|
| LMArena Instruction Following | 1362 | 1433 |

## Long Context

- GPT-5.4 nano: 41.6 (#131)
- MiMo-V2.5: 44.1 (#69)

| Benchmark | GPT-5.4 nano | MiMo-V2.5 |
|---|---|---|
| LMArena Longer Query | 1365 | 1444 |

## Writing & Preference

- GPT-5.4 nano: 55.9 (#137)
- MiMo-V2.5: 61.8 (#82)

| Benchmark | GPT-5.4 nano | MiMo-V2.5 |
|---|---|---|
| LMArena Text | 1372 | 1427 |
| LMArena Creative Writing | 1313 | 1392 |
| LMArena Multi-Turn | 1382 | 1445 |

## FAQ

### Is GPT-5.4 nano better than MiMo-V2.5?

MiMo-V2.5 is the stronger model overall, scoring 43.0 to 41.9 on the Noometry Index.

### Which is cheaper, GPT-5.4 nano 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; GPT-5.4 nano lists at $0.20 and $1.25.

### Is GPT-5.4 nano or MiMo-V2.5 better for coding?

They score almost the same on coding (43.1 vs 43.6); test both on your own repository before choosing.

### Which has the bigger context window?

MiMo-V2.5 does, with 1.05M tokens against 400K.

### How many benchmarks do GPT-5.4 nano and MiMo-V2.5 share?

22 benchmarks have published results for both models. GPT-5.4 nano has 40 scored results on Noometry and MiMo-V2.5 has 23.