Model comparison
MiMo-V2.6-Pro vs o3
MiMo-V2.6-Pro and o3 score almost the same on the Noometry Index (46.7 vs 47.4), so choose on price, context window or the category you care about most.
Last verified . 13 shared benchmarks.
Summary
- They share 13 benchmarks with published results for both. MiMo-V2.6-Pro scores higher in 4 categories and o3 in 5 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where o3 leads 54.5 to 43.0.
- MiMo-V2.6-Pro is cheaper at $0.43 / $0.87 per million input/output tokens, against $2 / $8 for o3.
- MiMo-V2.6-Pro accepts more context: 1.05M tokens versus 200K.
- MiMo-V2.6-Pro has downloadable open weights; the other is API-only.
Side by side
| MiMo-V2.6-Pro | o3 | |
|---|---|---|
| Provider | Xiaomi | OpenAI |
| Noometry Index | 46.7 | 47.4 |
| Released | 2026-09-22 | 2025-04-16 |
| Weights | Open | Proprietary |
| Context window | 1.05M | 200K |
| Max output | 131K | 100K |
| Input $ / M tokens | $0.43 | $2 |
| Output $ / M tokens | $0.87 | $8 |
| Results tracked | 14 | 63 |
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Category by category
Coding MiMo-V2.6-Pro leads
MiMo-V2.6-Pro: 53.2 (#27), o3: 47.3 (#57)
| Benchmark | MiMo-V2.6-Pro | o3 |
|---|---|---|
| LMArena Coding | 1538 | 1408 |
| SWE-bench Verified | — | 62.3% |
| SWE-bench Verified (bash only) | — | 58.4% |
| Aider Polyglot | — | 81.3% |
| LMArena WebDev | 1618 | — |
| GSO | — | 8.8% |
| WeirdML | — | 52.4% |
| CadEval | — | 74% |
| ALE-Bench | — | 933.55 |
Agentic & Tool Use Not comparable
MiMo-V2.6-Pro: —, o3: 34.3 (#42)
| Benchmark | MiMo-V2.6-Pro | o3 |
|---|---|---|
| Berkeley Function Calling Leaderboard | — | 63% |
| GDPval | — | 30.8% |
| DeepResearch Bench | — | 45.2% |
| OSWorld | — | 23% |
| LMArena Search | — | 1144 |
| METR Time Horizons | — | 65.4% |
Reasoning o3 leads
MiMo-V2.6-Pro: 30.4 (#76), o3: 32.1 (#66)
| Benchmark | MiMo-V2.6-Pro | o3 |
|---|---|---|
| LMArena Hard Prompts | 1511 | 1402 |
| ARC-AGI-2 | — | 6.5% |
| SimpleBench | — | 53.1% |
| Kagi LLM Benchmark | — | 67.6% |
| ARC-AGI-1 | — | 60.8% |
| CritPt | — | 1.4% |
| Chess Puzzles | — | 38% |
| EnigmaEval | — | 13.1% |
| Mystery Game Puzzles | — | 29% |
| DTBench | — | 84.8% |
| LMCA | — | 39.7% |
| Epoch Capabilities Index | — | 146.88 |
| ForecastBench | — | 62.5 |
Math o3 leads
MiMo-V2.6-Pro: 37.9 (#91), o3: 48.9 (#49)
| Benchmark | MiMo-V2.6-Pro | o3 |
|---|---|---|
| LMArena Math | 1497 | 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 o3 leads
MiMo-V2.6-Pro: 43.0 (#85), o3: 54.5 (#47)
| Benchmark | MiMo-V2.6-Pro | o3 |
|---|---|---|
| LMArena Expert | 1548 | 1403 |
| 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 Too close to call
MiMo-V2.6-Pro: 40.2 (#40), o3: 40.7 (#35)
| Benchmark | MiMo-V2.6-Pro | o3 |
|---|---|---|
| LMArena Vision | 1265 | 1214 |
| GeoBench | — | 74% |
| VPCT | — | 52% |
Multilingual MiMo-V2.6-Pro leads
MiMo-V2.6-Pro: 57.0 (#15), o3: 51.9 (#99)
| Benchmark | MiMo-V2.6-Pro | o3 |
|---|---|---|
| LMArena Non-English | 1474 | 1402 |
| LMArena Chinese | 1532 | 1438 |
| LMArena Russian | 1481 | 1407 |
| LMArena French | — | 1430 |
| LMArena German | — | 1420 |
| LMArena Japanese | — | 1404 |
| LMArena Korean | — | 1371 |
| LMArena Spanish | — | 1395 |
Instruction Following MiMo-V2.6-Pro leads
MiMo-V2.6-Pro: 78.2 (#10), o3: 73.0 (#122)
| Benchmark | MiMo-V2.6-Pro | o3 |
|---|---|---|
| LMArena Instruction Following | 1490 | 1368 |
| IFEval | — | 86.9% |
Long Context o3 leads
MiMo-V2.6-Pro: 46.0 (#26), o3: 53.2 (#6)
| Benchmark | MiMo-V2.6-Pro | o3 |
|---|---|---|
| LMArena Longer Query | 1500 | 1372 |
| Fiction.LiveBench | — | 88.9% |
| CL-bench | — | 17.8% |
Writing & Preference MiMo-V2.6-Pro leads
MiMo-V2.6-Pro: 66.9 (#32), o3: 63.7 (#62)
| Benchmark | MiMo-V2.6-Pro | o3 |
|---|---|---|
| LMArena Text | 1491 | 1410 |
| LMArena Creative Writing | 1465 | 1359 |
| LMArena Multi-Turn | 1463 | 1405 |
| Short-Story Creative Writing | — | 83.9% |
| EQ-Bench Creative Writing | — | 1676 |
| WildBench | — | 86.1% |
Frequently asked questions
Is MiMo-V2.6-Pro better than o3?
MiMo-V2.6-Pro and o3 score almost the same on the Noometry Index (46.7 vs 47.4), so choose on price, context window or the category you care about most.
Which is cheaper, MiMo-V2.6-Pro or o3?
MiMo-V2.6-Pro is cheaper. It lists at $0.43 per million input tokens and $0.87 per million output tokens; o3 lists at $2 and $8.
Is MiMo-V2.6-Pro or o3 better for coding?
MiMo-V2.6-Pro scores higher on coding benchmarks: 53.2 versus 47.3 in the Noometry coding category.
Which has the bigger context window?
MiMo-V2.6-Pro does, with 1.05M tokens against 200K.
How many benchmarks do MiMo-V2.6-Pro and o3 share?
13 benchmarks have published results for both models. MiMo-V2.6-Pro has 14 scored results on Noometry and o3 has 63.