# MiMo-V2-Flash vs o3

> o3 is the stronger model overall, scoring 47.5 to 41.3 on the Noometry Index. MiMo-V2-Flash costs 20× less per token, which makes it the better buy when o3's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/mimo-v2-flash-vs-o3
- Last updated: 2026-10-10
- Shared benchmarks: 19

## Summary

- They share 19 benchmarks with published results for both. MiMo-V2-Flash scores higher in 1 category and o3 in 7 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where o3 leads 54.6 to 39.7.
- MiMo-V2-Flash is cheaper at $0.14 / $0.28 per million input/output tokens, against $2 / $8 for o3.
- MiMo-V2-Flash accepts more context: 262K tokens versus 200K.
- MiMo-V2-Flash has downloadable open weights; the other is API-only.

## Snapshot

| | MiMo-V2-Flash | o3 |
|---|---|---|
| Provider | Xiaomi | OpenAI |
| Noometry Index | 41.3 | 47.5 |
| Rank | 138 | 61 |
| Context | 262K | 200K |
| Input $/M | $0.14 | $2 |
| Output $/M | $0.28 | $8 |
| Weights | Open | Proprietary |

## Coding

- MiMo-V2-Flash: 36.1 (#211)
- o3: 46.8 (#64)

| Benchmark | MiMo-V2-Flash | o3 |
|---|---|---|
| LMArena Coding | 1443 | 1408 |
| ALE-Bench | 737.95 | 933.55 |
| SWE-bench Verified | — | 62.3% |
| SWE-bench Verified (bash only) | — | 58.4% |
| Aider Polyglot | — | 81.3% |
| LMArena WebDev | 1330 | — |
| SciCode | 25.9% | — |
| GSO | — | 8.8% |
| WeirdML | — | 52.4% |
| CadEval | — | 74% |

## Agentic & Tool Use

- MiMo-V2-Flash: —
- o3: 34.5 (#44)

| Benchmark | MiMo-V2-Flash | o3 |
|---|---|---|
| Berkeley Function Calling Leaderboard | — | 63% |
| GDPval | — | 30.8% |
| DeepResearch Bench | — | 45.2% |
| OSWorld | — | 23% |
| LMArena Search | — | 1144 |
| METR Time Horizons | — | 65.4% |

## Reasoning

- MiMo-V2-Flash: 24.9 (#157)
- o3: 32.0 (#78)

| Benchmark | MiMo-V2-Flash | o3 |
|---|---|---|
| CritPt | 0% | 1.4% |
| LMArena Hard Prompts | 1420 | 1402 |
| ARC-AGI-2 | — | 6.5% |
| SimpleBench | — | 53.1% |
| Kagi LLM Benchmark | — | 67.6% |
| ARC-AGI-1 | — | 60.8% |
| Chess Puzzles | — | 38% |
| EnigmaEval | — | 13.1% |
| Mystery Game Puzzles | — | 29% |
| DTBench | — | 84.8% |
| LMCA | — | 39.7% |
| Epoch Capabilities Index | — | 146.86 |
| ForecastBench | — | 62.5 |

## Math

- MiMo-V2-Flash: 38.3 (#139)
- o3: 50.2 (#58)

| Benchmark | MiMo-V2-Flash | o3 |
|---|---|---|
| LMArena Math | 1396 | 1426 |
| FrontierMath (Tiers 1-3) | — | 33.3% |
| OTIS Mock AIME 2024-2025 | — | 84.4% |
| Omni-MATH | — | 71.4% |
| MATH Level 5 | — | 97.8% |
| FrontierMath (Feb 2025 set) | — | 18.7% |
| FrontierMath Tier 4 (v1) | — | 2.1% |

## Knowledge

- MiMo-V2-Flash: 39.7 (#131)
- o3: 54.6 (#52)

| Benchmark | MiMo-V2-Flash | o3 |
|---|---|---|
| LMArena Expert | 1425 | 1402 |
| GPQA Diamond | — | 81.8% |
| Humanity's Last Exam | — | 20.3% |
| SimpleQA Verified | — | 49.4% |
| MMLU-Pro | — | 85.9% |
| Confabulations | — | 14.4% |
| GPQA (HELM) | — | 75.3% |

## Multimodal

- MiMo-V2-Flash: —
- o3: 41.4 (#36)

| Benchmark | MiMo-V2-Flash | o3 |
|---|---|---|
| LMArena Vision | — | 1214 |
| GeoBench | — | 74% |
| VPCT | — | 52% |

## Multilingual

- MiMo-V2-Flash: 51.0 (#113)
- o3: 51.7 (#105)

| Benchmark | MiMo-V2-Flash | o3 |
|---|---|---|
| LMArena Non-English | 1392 | 1401 |
| LMArena Chinese | 1462 | 1437 |
| LMArena French | 1429 | 1430 |
| LMArena German | 1395 | 1420 |
| LMArena Japanese | 1325 | 1403 |
| LMArena Korean | 1358 | 1370 |
| LMArena Russian | 1387 | 1406 |
| LMArena Spanish | 1420 | 1395 |

## Instruction Following

- MiMo-V2-Flash: 73.5 (#120)
- o3: 72.8 (#127)

| Benchmark | MiMo-V2-Flash | o3 |
|---|---|---|
| LMArena Instruction Following | 1392 | 1368 |
| IFEval | — | 86.9% |

## Long Context

- MiMo-V2-Flash: 43.0 (#110)
- o3: 53.3 (#6)

| Benchmark | MiMo-V2-Flash | o3 |
|---|---|---|
| LMArena Longer Query | 1409 | 1372 |
| Fiction.LiveBench | — | 88.9% |
| CL-bench | — | 17.8% |

## Writing & Preference

- MiMo-V2-Flash: 59.7 (#106)
- o3: 63.5 (#64)

| Benchmark | MiMo-V2-Flash | o3 |
|---|---|---|
| LMArena Text | 1411 | 1410 |
| LMArena Creative Writing | 1375 | 1359 |
| LMArena Multi-Turn | 1404 | 1405 |
| Short-Story Creative Writing | — | 83.9% |
| EQ-Bench Creative Writing | — | 1676 |
| WildBench | — | 86.1% |

## FAQ

### Is MiMo-V2-Flash better than o3?

o3 is the stronger model overall, scoring 47.5 to 41.3 on the Noometry Index. MiMo-V2-Flash costs 20× less per token, which makes it the better buy when o3's lead doesn't matter for your workload.

### Which is cheaper, MiMo-V2-Flash or o3?

MiMo-V2-Flash is cheaper. It lists at $0.14 per million input tokens and $0.28 per million output tokens; o3 lists at $2 and $8.

### Is MiMo-V2-Flash or o3 better for coding?

o3 scores higher on coding benchmarks: 46.8 versus 36.1 in the Noometry coding category.

### Which has the bigger context window?

MiMo-V2-Flash does, with 262K tokens against 200K.

### How many benchmarks do MiMo-V2-Flash and o3 share?

19 benchmarks have published results for both models. MiMo-V2-Flash has 21 scored results on Noometry and o3 has 63.