# GPT-4o mini vs Qwen3.5 27B

> Qwen3.5 27B is the stronger model overall, scoring 41.9 to 25.5 on the Noometry Index. GPT-4o mini costs 3.1× less per token, which makes it the better buy when Qwen3.5 27B's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/gpt-4o-mini-vs-qwen3-5-27b
- Last updated: 2026-10-10
- Shared benchmarks: 21

## Summary

- They share 21 benchmarks with published results for both. GPT-4o mini scores higher in 0 categories and Qwen3.5 27B in 9 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in math, where Qwen3.5 27B leads 38.8 to 10.4.
- The biggest single-benchmark swing is DTBench: 54.4% for GPT-4o mini and 82.4% for Qwen3.5 27B.
- GPT-4o mini is cheaper at $0.15 / $0.60 per million input/output tokens, against $0.30 / $2.40 for Qwen3.5 27B.
- Qwen3.5 27B accepts more context: 262K tokens versus 128K.
- Qwen3.5 27B has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-4o mini | Qwen3.5 27B |
|---|---|---|
| Provider | OpenAI | Alibaba (Qwen) |
| Noometry Index | 25.5 | 41.9 |
| Rank | 343 | 127 |
| Context | 128K | 262K |
| Input $/M | $0.15 | $0.30 |
| Output $/M | $0.60 | $2.40 |
| Weights | Proprietary | Open |

## Coding

- GPT-4o mini: 22.0 (#335)
- Qwen3.5 27B: 38.9 (#168)

| Benchmark | GPT-4o mini | Qwen3.5 27B |
|---|---|---|
| WeirdML | 11.8% | 39.5% |
| LMArena Coding | 1290 | 1427 |
| Aider Polyglot | 3.6% | — |
| LMArena WebDev | — | 1358 |
| BigCodeBench Instruct | 46.1% | — |
| LiveBench Coding | 43.1% | — |
| BigCodeBench Complete | 57.4% | — |
| ALE-Bench | — | 349.45 |
| HumanEval+ | 83.5% | — |
| MBPP+ | 72.2% | — |

## Agentic & Tool Use

- GPT-4o mini: 27.5 (#101)
- Qwen3.5 27B: —

| Benchmark | GPT-4o mini | Qwen3.5 27B |
|---|---|---|
| BALROG | 17.4% | — |
| Vending-Bench 2 | — | 201.98 |

## Reasoning

- GPT-4o mini: 8.7 (#347)
- Qwen3.5 27B: 27.5 (#117)

| Benchmark | GPT-4o mini | Qwen3.5 27B |
|---|---|---|
| LMArena Hard Prompts | 1267 | 1414 |
| DTBench | 54.4% | 82.4% |
| LMCA | 10.4% | 34% |
| ARC-AGI-2 | 0% | — |
| SimpleBench | 10.7% | — |
| Kagi LLM Benchmark | 28.8% | — |
| NYT Connections (extended) | — | 47.9% |
| Chess Puzzles | 0% | — |
| Thematic Generalization | — | 45.5% |
| LiveBench Reasoning | 32.8% | — |
| Mystery Game Puzzles | 12% | — |
| LiveBench Data Analysis | 50% | — |
| Epoch Capabilities Index | 126.56 | — |
| LiveBench | 41.3% | — |
| PIQA | 88.7% | — |

## Math

- GPT-4o mini: 10.4 (#314)
- Qwen3.5 27B: 38.8 (#127)

| Benchmark | GPT-4o mini | Qwen3.5 27B |
|---|---|---|
| LMArena Math | 1267 | 1429 |
| FrontierMath (Tiers 1-3) | 0.7% | — |
| MathArena Final-Answer Competitions | — | 56.7% |
| OTIS Mock AIME 2024-2025 | 6.9% | — |
| Omni-MATH | 28% | — |
| LiveBench Math | 36.3% | — |
| MATH Level 5 | 52.6% | — |
| GSM8K | 91.3% | — |

## Knowledge

- GPT-4o mini: 17.7 (#284)
- Qwen3.5 27B: 38.0 (#150)

| Benchmark | GPT-4o mini | Qwen3.5 27B |
|---|---|---|
| LMArena Expert | 1235 | 1428 |
| GPQA Diamond | 37.7% | — |
| SimpleQA Verified | 8.3% | — |
| MMLU-Pro | 60.3% | — |
| Confabulations | 37.2% | — |
| Vectara Hallucination Rate | — | 12.1% |
| GPQA (HELM) | 36.8% | — |
| BoolQ | 88.7% | — |
| MMLU | 81.8% | — |

## Multimodal

- GPT-4o mini: 25.9 (#122)
- Qwen3.5 27B: 39.4 (#59)

| Benchmark | GPT-4o mini | Qwen3.5 27B |
|---|---|---|
| LMArena Vision | 1066 | 1241 |
| Video-MME | 64.8% | — |
| GeoBench | 64% | — |
| VPCT | 34% | — |

## Multilingual

- GPT-4o mini: 42.0 (#199)
- Qwen3.5 27B: 50.8 (#115)

| Benchmark | GPT-4o mini | Qwen3.5 27B |
|---|---|---|
| LMArena Non-English | 1266 | 1390 |
| LMArena Chinese | 1265 | 1478 |
| LMArena French | 1297 | 1410 |
| LMArena German | 1272 | 1393 |
| LMArena Japanese | 1216 | 1345 |
| LMArena Korean | 1195 | 1358 |
| LMArena Russian | 1275 | 1390 |
| LMArena Spanish | 1276 | 1407 |

## Instruction Following

- GPT-4o mini: 61.9 (#239)
- Qwen3.5 27B: 73.5 (#119)

| Benchmark | GPT-4o mini | Qwen3.5 27B |
|---|---|---|
| LMArena Instruction Following | 1258 | 1393 |
| LiveBench Instruction Following | 56.8% | — |
| IFEval | 78.2% | — |

## Long Context

- GPT-4o mini: 39.1 (#186)
- Qwen3.5 27B: 43.1 (#106)

| Benchmark | GPT-4o mini | Qwen3.5 27B |
|---|---|---|
| LMArena Longer Query | 1289 | 1413 |

## Writing & Preference

- GPT-4o mini: 39.5 (#248)
- Qwen3.5 27B: 59.3 (#111)

| Benchmark | GPT-4o mini | Qwen3.5 27B |
|---|---|---|
| LMArena Text | 1286 | 1409 |
| LMArena Creative Writing | 1268 | 1362 |
| LMArena Multi-Turn | 1285 | 1410 |
| Short-Story Creative Writing | 67.2% | — |
| EQ-Bench Creative Writing | 873 | — |
| WildBench | 79.1% | — |
| LiveBench Language | 28.6% | — |

## FAQ

### Is GPT-4o mini better than Qwen3.5 27B?

Qwen3.5 27B is the stronger model overall, scoring 41.9 to 25.5 on the Noometry Index. GPT-4o mini costs 3.1× less per token, which makes it the better buy when Qwen3.5 27B's lead doesn't matter for your workload.

### Which is cheaper, GPT-4o mini or Qwen3.5 27B?

GPT-4o mini is cheaper. It lists at $0.15 per million input tokens and $0.60 per million output tokens; Qwen3.5 27B lists at $0.30 and $2.40.

### Is GPT-4o mini or Qwen3.5 27B better for coding?

Qwen3.5 27B scores higher on coding benchmarks: 38.9 versus 22.0 in the Noometry coding category.

### Which has the bigger context window?

Qwen3.5 27B does, with 262K tokens against 128K.

### How many benchmarks do GPT-4o mini and Qwen3.5 27B share?

21 benchmarks have published results for both models. GPT-4o mini has 60 scored results on Noometry and Qwen3.5 27B has 28.