Model comparison
o4-mini vs Qwen3.5 Plus
o4-mini and Qwen3.5 Plus score almost the same on the Noometry Index (41.6 vs 42.3), so choose on price, context window or the category you care about most.
Last verified . 12 shared benchmarks.
Alibaba (Qwen)Summary
- They share 12 benchmarks with published results for both. o4-mini scores higher in 1 category and Qwen3.5 Plus in 3 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in math, where Qwen3.5 Plus leads 47.9 to 40.2.
- The biggest single-benchmark swing is Mystery Game Puzzles: 5% for o4-mini and 17% for Qwen3.5 Plus.
- Qwen3.5 Plus is cheaper at $0.40 / $2.40 per million input/output tokens, against $1.10 / $4.40 for o4-mini.
- Qwen3.5 Plus accepts more context: 1M tokens versus 200K.
Side by side
| o4-mini | Qwen3.5 Plus | |
|---|---|---|
| Provider | OpenAI | Alibaba (Qwen) |
| Noometry Index | 41.6 | 42.3 |
| Released | 2025-04-16 | 2026-02-16 |
| Weights | Proprietary | Proprietary |
| Context window | 200K | 1M |
| Max output | 100K | 66K |
| Input $ / M tokens | $1.10 | $0.40 |
| Output $ / M tokens | $4.40 | $2.40 |
| Results tracked | 60 | 15 |
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Category by category
Coding Not comparable
o4-mini: 41.6 (#110), Qwen3.5 Plus: —
| Benchmark | o4-mini | Qwen3.5 Plus |
|---|---|---|
| ALE-Bench | 826.17 | 621.92 |
| SWE-bench Verified (bash only) | 45% | — |
| Aider Polyglot | 72% | — |
| GSO | 3.6% | — |
| WeirdML | 52.6% | — |
| LMArena Coding | 1369 | — |
| CadEval | 62% | — |
| AlgoTune | 1.72 | — |
Agentic & Tool Use Not comparable
o4-mini: 32.3 (#57), Qwen3.5 Plus: —
| Benchmark | o4-mini | Qwen3.5 Plus |
|---|---|---|
| Berkeley Function Calling Leaderboard | 53.2% | — |
| GDPval | 25.3% | — |
| METR Time Horizons | 63.9% | — |
| Vending-Bench 2 | — | 0.54 |
Reasoning Qwen3.5 Plus leads
o4-mini: 24.6 (#143), Qwen3.5 Plus: 32.0 (#67)
| Benchmark | o4-mini | Qwen3.5 Plus |
|---|---|---|
| Chess Puzzles | 26% | 22% |
| Mystery Game Puzzles | 5% | 17% |
| DTBench | 77.6% | 80.5% |
| LMCA | 26.5% | 36.4% |
| Epoch Capabilities Index | 145.63 | 146.79 |
| ARC-AGI-2 | 6.1% | — |
| SimpleBench | 38.7% | — |
| Kagi LLM Benchmark | 67.6% | — |
| ARC-AGI-1 | 58.7% | — |
| CritPt | 0.6% | — |
| EnigmaEval | 9.2% | — |
| LMArena Hard Prompts | 1351 | — |
| ForecastBench | 61.8 | — |
Math Qwen3.5 Plus leads
o4-mini: 40.2 (#79), Qwen3.5 Plus: 47.9 (#55)
| Benchmark | o4-mini | Qwen3.5 Plus |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 81.7% | 86.7% |
| FrontierMath (Feb 2025 set) | 24.8% | 21% |
| FrontierMath Tier 4 (v1) | 6.3% | 2.1% |
| FrontierMath (Tiers 1-3) | 36.1% | — |
| FrontierMath Tier 4 | 4.9% | — |
| Omni-MATH | 72% | — |
| LMArena Math | 1390 | — |
| MATH Level 5 | 97.8% | — |
Knowledge Qwen3.5 Plus leads
o4-mini: 43.5 (#83), Qwen3.5 Plus: 46.0 (#78)
| Benchmark | o4-mini | Qwen3.5 Plus |
|---|---|---|
| GPQA Diamond | 79.6% | 84.8% |
| SimpleQA Verified | 19.6% | 25.4% |
| Vectara Hallucination Rate | 18.6% | 10.7% |
| Humanity's Last Exam | 18.1% | — |
| MMLU-Pro | 82% | — |
| Confabulations | 15.8% | — |
| GPQA (HELM) | 73.5% | — |
| LMArena Expert | 1344 | — |
Multimodal Not comparable
o4-mini: 39.5 (#46), Qwen3.5 Plus: —
| Benchmark | o4-mini | Qwen3.5 Plus |
|---|---|---|
| LMArena Vision | 1194 | — |
| GeoBench | 64% | — |
| VPCT | 57.5% | — |
Multilingual Not comparable
o4-mini: 47.2 (#149), Qwen3.5 Plus: —
| Benchmark | o4-mini | Qwen3.5 Plus |
|---|---|---|
| LMArena Non-English | 1336 | — |
| LMArena Chinese | 1355 | — |
| LMArena French | 1362 | — |
| LMArena German | 1336 | — |
| LMArena Japanese | 1308 | — |
| LMArena Korean | 1313 | — |
| LMArena Russian | 1334 | — |
| LMArena Spanish | 1346 | — |
Instruction Following Not comparable
o4-mini: 75.4 (#63), Qwen3.5 Plus: —
| Benchmark | o4-mini | Qwen3.5 Plus |
|---|---|---|
| IFEval | 92.8% | — |
| LMArena Instruction Following | 1321 | — |
Long Context o4-mini leads
o4-mini: 45.5 (#31), Qwen3.5 Plus: 42.9 (#109)
| Benchmark | o4-mini | Qwen3.5 Plus |
|---|---|---|
| Fiction.LiveBench | 77.8% | — |
| CL-bench | — | 19.8% |
| CL-bench Life | — | 12.4% |
| LMArena Longer Query | 1315 | — |
Writing & Preference Not comparable
o4-mini: 54.2 (#148), Qwen3.5 Plus: —
| Benchmark | o4-mini | Qwen3.5 Plus |
|---|---|---|
| LMArena Text | 1353 | — |
| LMArena Creative Writing | 1294 | — |
| Short-Story Creative Writing | 75% | — |
| WildBench | 85.4% | — |
| LMArena Multi-Turn | 1350 | — |
Frequently asked questions
Is o4-mini better than Qwen3.5 Plus?
o4-mini and Qwen3.5 Plus score almost the same on the Noometry Index (41.6 vs 42.3), so choose on price, context window or the category you care about most.
Which is cheaper, o4-mini or Qwen3.5 Plus?
Qwen3.5 Plus is cheaper. It lists at $0.40 per million input tokens and $2.40 per million output tokens; o4-mini lists at $1.10 and $4.40.
Which has the bigger context window?
Qwen3.5 Plus does, with 1M tokens against 200K.
How many benchmarks do o4-mini and Qwen3.5 Plus share?
12 benchmarks have published results for both models. o4-mini has 60 scored results on Noometry and Qwen3.5 Plus has 15.