Model comparison
o3-mini vs Qwen3.5 27B
Qwen3.5 27B is the stronger model overall, scoring 41.9 to 36.7 on the Noometry Index.
Last verified . 20 shared benchmarks.
Alibaba (Qwen)Summary
- They share 20 benchmarks with published results for both. o3-mini scores higher in 3 categories and Qwen3.5 27B in 5 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Qwen3.5 27B leads 27.5 to 16.3.
- The biggest single-benchmark swing is LMCA: 19% for o3-mini and 34% for Qwen3.5 27B.
- Qwen3.5 27B is cheaper at $0.30 / $2.40 per million input/output tokens, against $1.10 / $4.40 for o3-mini.
- Qwen3.5 27B accepts more context: 262K tokens versus 200K.
- Qwen3.5 27B has downloadable open weights; the other is API-only.
Side by side
| o3-mini | Qwen3.5 27B | |
|---|---|---|
| Provider | OpenAI | Alibaba (Qwen) |
| Noometry Index | 36.7 | 41.9 |
| Released | 2024-12-20 | 2026-02-23 |
| Weights | Proprietary | Open |
| Context window | 200K | 262K |
| Max output | 100K | 66K |
| Input $ / M tokens | $1.10 | $0.30 |
| Output $ / M tokens | $4.40 | $2.40 |
| Results tracked | 51 | 28 |
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Category by category
Coding o3-mini leads
o3-mini: 40.8 (#132), Qwen3.5 27B: 38.9 (#168)
| Benchmark | o3-mini | Qwen3.5 27B |
|---|---|---|
| WeirdML | 43.7% | 39.5% |
| LMArena Coding | 1378 | 1427 |
| Aider Polyglot | 60.4% | — |
| LMArena WebDev | — | 1358 |
| SciCode | 39.8% | — |
| GSO | 1.3% | — |
| LiveBench Coding | 82.7% | — |
| CadEval | 54% | — |
| ALE-Bench | — | 349.45 |
Agentic & Tool Use Not comparable
o3-mini: 29.6 (#84), Qwen3.5 27B: —
| Benchmark | o3-mini | Qwen3.5 27B |
|---|---|---|
| Cybench | 22.5% | — |
| Vending-Bench 2 | — | 201.98 |
Reasoning Qwen3.5 27B leads
o3-mini: 16.3 (#305), Qwen3.5 27B: 27.5 (#117)
| Benchmark | o3-mini | Qwen3.5 27B |
|---|---|---|
| LMArena Hard Prompts | 1366 | 1414 |
| DTBench | 68.8% | 82.4% |
| LMCA | 19% | 34% |
| ARC-AGI-2 | 3% | — |
| SimpleBench | 22.8% | — |
| NYT Connections (extended) | — | 47.9% |
| ARC-AGI-1 | 34.5% | — |
| CritPt | 0.3% | — |
| Chess Puzzles | 17% | — |
| Thematic Generalization | — | 45.5% |
| LiveBench Reasoning | 89.6% | — |
| Mystery Game Puzzles | 7% | — |
| LiveBench Data Analysis | 70.6% | — |
| Epoch Capabilities Index | 140.34 | — |
| ForecastBench | 59.6 | — |
| LiveBench | 75.9% | — |
Math Qwen3.5 27B leads
o3-mini: 28.1 (#244), Qwen3.5 27B: 38.8 (#127)
| Benchmark | o3-mini | Qwen3.5 27B |
|---|---|---|
| LMArena Math | 1396 | 1429 |
| FrontierMath (Tiers 1-3) | 18.6% | — |
| FrontierMath Tier 4 | 0% | — |
| MathArena Final-Answer Competitions | — | 56.7% |
| OTIS Mock AIME 2024-2025 | 76.9% | — |
| LiveBench Math | 77.3% | — |
| MATH Level 5 | 96.5% | — |
| FrontierMath (Feb 2025 set) | 12.4% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |
Knowledge Too close to call
o3-mini: 38.3 (#146), Qwen3.5 27B: 38.0 (#150)
| Benchmark | o3-mini | Qwen3.5 27B |
|---|---|---|
| LMArena Expert | 1364 | 1428 |
| GPQA Diamond | 77% | — |
| SimpleQA Verified | 15.3% | — |
| Confabulations | 17.9% | — |
| Vectara Hallucination Rate | — | 12.1% |
Multimodal Not comparable
o3-mini: —, Qwen3.5 27B: 39.4 (#59)
| Benchmark | o3-mini | Qwen3.5 27B |
|---|---|---|
| LMArena Vision | — | 1241 |
Multilingual Qwen3.5 27B leads
o3-mini: 45.7 (#164), Qwen3.5 27B: 50.8 (#115)
| Benchmark | o3-mini | Qwen3.5 27B |
|---|---|---|
| LMArena Non-English | 1319 | 1390 |
| LMArena Chinese | 1379 | 1478 |
| LMArena French | 1334 | 1410 |
| LMArena German | 1303 | 1393 |
| LMArena Japanese | 1286 | 1345 |
| LMArena Korean | 1314 | 1358 |
| LMArena Russian | 1304 | 1390 |
| LMArena Spanish | 1321 | 1407 |
Instruction Following o3-mini leads
o3-mini: 75.1 (#72), Qwen3.5 27B: 73.5 (#119)
| Benchmark | o3-mini | Qwen3.5 27B |
|---|---|---|
| LMArena Instruction Following | 1337 | 1393 |
| LiveBench Instruction Following | 84.4% | — |
Long Context Qwen3.5 27B leads
o3-mini: 33.8 (#256), Qwen3.5 27B: 43.1 (#106)
| Benchmark | o3-mini | Qwen3.5 27B |
|---|---|---|
| LMArena Longer Query | 1343 | 1413 |
| Fiction.LiveBench | 50% | — |
Writing & Preference Qwen3.5 27B leads
o3-mini: 50.3 (#182), Qwen3.5 27B: 59.3 (#111)
| Benchmark | o3-mini | Qwen3.5 27B |
|---|---|---|
| LMArena Text | 1337 | 1409 |
| LMArena Creative Writing | 1286 | 1362 |
| LMArena Multi-Turn | 1320 | 1410 |
| Short-Story Creative Writing | 61.7% | — |
| LiveBench Language | 50.7% | — |
Frequently asked questions
Is o3-mini better than Qwen3.5 27B?
Qwen3.5 27B is the stronger model overall, scoring 41.9 to 36.7 on the Noometry Index.
Which is cheaper, o3-mini or Qwen3.5 27B?
Qwen3.5 27B is cheaper. It lists at $0.30 per million input tokens and $2.40 per million output tokens; o3-mini lists at $1.10 and $4.40.
Is o3-mini or Qwen3.5 27B better for coding?
o3-mini scores higher on coding benchmarks: 40.8 versus 38.9 in the Noometry coding category.
Which has the bigger context window?
Qwen3.5 27B does, with 262K tokens against 200K.
How many benchmarks do o3-mini and Qwen3.5 27B share?
20 benchmarks have published results for both models. o3-mini has 51 scored results on Noometry and Qwen3.5 27B has 28.