# o3-pro vs Qwen3.5 Plus

> o3-pro and Qwen3.5 Plus score almost the same on the Noometry Index (42.9 vs 42.9), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/o3-pro-vs-qwen3-5-plus
- Last updated: 2026-10-10
- Shared benchmarks: 4

## Summary

- They share 4 benchmarks with published results for both. o3-pro scores higher in 1 category and Qwen3.5 Plus in 2 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in long context, where o3-pro leads 72.2 to 43.0.
- The biggest single-benchmark swing is Vectara Hallucination Rate: 23.3% for o3-pro and 10.7% for Qwen3.5 Plus.
- Qwen3.5 Plus is cheaper at $0.40 / $2.40 per million input/output tokens, against $20 / $80 for o3-pro.
- Qwen3.5 Plus accepts more context: 1M tokens versus 200K.

## Snapshot

| | o3-pro | Qwen3.5 Plus |
|---|---|---|
| Provider | OpenAI | Alibaba (Qwen) |
| Noometry Index | 42.9 | 42.9 |
| Rank | 105 | 106 |
| Context | 200K | 1M |
| Input $/M | $20 | $0.40 |
| Output $/M | $80 | $2.40 |
| Weights | Proprietary | Proprietary |

## Coding

- o3-pro: 55.5 (#24)
- Qwen3.5 Plus: —

| Benchmark | o3-pro | Qwen3.5 Plus |
|---|---|---|
| Aider Polyglot | 84.9% | — |
| WeirdML | 58.2% | — |
| ALE-Bench | — | 621.92 |

## Agentic & Tool Use

- o3-pro: —
- Qwen3.5 Plus: —

| Benchmark | o3-pro | Qwen3.5 Plus |
|---|---|---|
| Vending-Bench 2 | — | 0.54 |

## Reasoning

- o3-pro: 23.8 (#171)
- Qwen3.5 Plus: 32.8 (#74)

| Benchmark | o3-pro | Qwen3.5 Plus |
|---|---|---|
| DTBench | 86.9% | 80.5% |
| LMCA | 38.5% | 36.4% |
| Epoch Capabilities Index | 147.42 | 146.78 |
| ARC-AGI-2 | 4.9% | — |
| Kagi LLM Benchmark | 72.1% | — |
| ARC-AGI-1 | 59.3% | — |
| Chess Puzzles | — | 22% |
| Mystery Game Puzzles | — | 17% |

## Math

- o3-pro: —
- Qwen3.5 Plus: 49.6 (#61)

| Benchmark | o3-pro | Qwen3.5 Plus |
|---|---|---|
| OTIS Mock AIME 2024-2025 | — | 86.7% |
| FrontierMath (Feb 2025 set) | — | 21% |
| FrontierMath Tier 4 (v1) | — | 2.1% |

## Knowledge

- o3-pro: 29.5 (#238)
- Qwen3.5 Plus: 46.0 (#83)

| Benchmark | o3-pro | Qwen3.5 Plus |
|---|---|---|
| Vectara Hallucination Rate | 23.3% | 10.7% |
| GPQA Diamond | — | 84.8% |
| SimpleQA Verified | — | 25.4% |
| Confabulations | 14.2% | — |

## Long Context

- o3-pro: 72.2 (#1)
- Qwen3.5 Plus: 43.0 (#113)

| Benchmark | o3-pro | Qwen3.5 Plus |
|---|---|---|
| Fiction.LiveBench | 97.2% | — |
| CL-bench | — | 19.8% |
| CL-bench Life | — | 12.4% |

## Writing & Preference

- o3-pro: 57.1 (#133)
- Qwen3.5 Plus: —

| Benchmark | o3-pro | Qwen3.5 Plus |
|---|---|---|
| Short-Story Creative Writing | 84.4% | — |

## FAQ

### Is o3-pro better than Qwen3.5 Plus?

o3-pro and Qwen3.5 Plus score almost the same on the Noometry Index (42.9 vs 42.9), so choose on price, context window or the category you care about most.

### Which is cheaper, o3-pro 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; o3-pro lists at $20 and $80.

### Which has the bigger context window?

Qwen3.5 Plus does, with 1M tokens against 200K.

### How many benchmarks do o3-pro and Qwen3.5 Plus share?

4 benchmarks have published results for both models. o3-pro has 12 scored results on Noometry and Qwen3.5 Plus has 15.