# GPT-5.5 Instant vs Qwen3.5 Plus

> GPT-5.5 Instant and Qwen3.5 Plus score almost the same on the Noometry Index (42.7 vs 42.9), so choose on price, context window or the category you care about most.

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

## Summary

- They share 4 benchmarks with published results for both. GPT-5.5 Instant scores higher in 2 categories and Qwen3.5 Plus in 2 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in math, where Qwen3.5 Plus leads 49.6 to 26.5.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 68.1% for GPT-5.5 Instant and 86.7% for Qwen3.5 Plus.

## Snapshot

| | GPT-5.5 Instant | Qwen3.5 Plus |
|---|---|---|
| Provider | OpenAI | Alibaba (Qwen) |
| Noometry Index | 42.7 | 42.9 |
| Rank | 110 | 106 |
| Context | — | 1M |
| Input $/M | — | $0.40 |
| Output $/M | — | $2.40 |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-5.5 Instant: 44.3 (#74)
- Qwen3.5 Plus: —

| Benchmark | GPT-5.5 Instant | Qwen3.5 Plus |
|---|---|---|
| SciCode | 48.6% | — |
| LMArena Coding | 1433 | — |
| ALE-Bench | — | 621.92 |

## Agentic & Tool Use

- GPT-5.5 Instant: —
- Qwen3.5 Plus: —

| Benchmark | GPT-5.5 Instant | Qwen3.5 Plus |
|---|---|---|
| Vending-Bench 2 | — | 0.54 |

## Reasoning

- GPT-5.5 Instant: 24.9 (#155)
- Qwen3.5 Plus: 32.8 (#74)

| Benchmark | GPT-5.5 Instant | Qwen3.5 Plus |
|---|---|---|
| Chess Puzzles | 12% | 22% |
| Epoch Capabilities Index | 142.52 | 146.78 |
| CritPt | 0% | — |
| LMArena Hard Prompts | 1426 | — |
| Mystery Game Puzzles | — | 17% |
| DTBench | — | 80.5% |
| LMCA | — | 36.4% |

## Math

- GPT-5.5 Instant: 26.5 (#259)
- Qwen3.5 Plus: 49.6 (#61)

| Benchmark | GPT-5.5 Instant | Qwen3.5 Plus |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 68.1% | 86.7% |
| FrontierMath (Tiers 1-3) | 26.3% | — |
| FrontierMath Tier 4 | 2.4% | — |
| LMArena Math | 1420 | — |
| FrontierMath (Feb 2025 set) | — | 21% |
| FrontierMath Tier 4 (v1) | — | 2.1% |

## Knowledge

- GPT-5.5 Instant: 48.9 (#74)
- Qwen3.5 Plus: 46.0 (#83)

| Benchmark | GPT-5.5 Instant | Qwen3.5 Plus |
|---|---|---|
| GPQA Diamond | 82.5% | 84.8% |
| SimpleQA Verified | — | 25.4% |
| Vectara Hallucination Rate | — | 10.7% |
| LMArena Expert | 1409 | — |

## Multimodal

- GPT-5.5 Instant: 40.0 (#52)
- Qwen3.5 Plus: —

| Benchmark | GPT-5.5 Instant | Qwen3.5 Plus |
|---|---|---|
| LMArena Vision | 1250 | — |
| LMArena Document | 1403 | — |

## Multilingual

- GPT-5.5 Instant: 52.8 (#80)
- Qwen3.5 Plus: —

| Benchmark | GPT-5.5 Instant | Qwen3.5 Plus |
|---|---|---|
| LMArena Non-English | 1417 | — |
| LMArena Chinese | 1456 | — |
| LMArena French | 1428 | — |
| LMArena German | 1411 | — |
| LMArena Japanese | 1408 | — |
| LMArena Korean | 1392 | — |
| LMArena Russian | 1431 | — |
| LMArena Spanish | 1429 | — |

## Instruction Following

- GPT-5.5 Instant: 74.2 (#100)
- Qwen3.5 Plus: —

| Benchmark | GPT-5.5 Instant | Qwen3.5 Plus |
|---|---|---|
| LMArena Instruction Following | 1406 | — |

## Long Context

- GPT-5.5 Instant: 43.4 (#96)
- Qwen3.5 Plus: 43.0 (#113)

| Benchmark | GPT-5.5 Instant | Qwen3.5 Plus |
|---|---|---|
| CL-bench | — | 19.8% |
| CL-bench Life | — | 12.4% |
| LMArena Longer Query | 1422 | — |

## Writing & Preference

- GPT-5.5 Instant: 61.8 (#85)
- Qwen3.5 Plus: —

| Benchmark | GPT-5.5 Instant | Qwen3.5 Plus |
|---|---|---|
| LMArena Text | 1419 | — |
| LMArena Creative Writing | 1419 | — |
| LMArena Multi-Turn | 1433 | — |

## FAQ

### Is GPT-5.5 Instant better than Qwen3.5 Plus?

GPT-5.5 Instant and Qwen3.5 Plus score almost the same on the Noometry Index (42.7 vs 42.9), so choose on price, context window or the category you care about most.

### How many benchmarks do GPT-5.5 Instant and Qwen3.5 Plus share?

4 benchmarks have published results for both models. GPT-5.5 Instant has 27 scored results on Noometry and Qwen3.5 Plus has 15.