# Grok 4.5 vs Qwen3.5 Plus

> Grok 4.5 is the stronger model overall, scoring 55.0 to 42.9 on the Noometry Index. Qwen3.5 Plus costs 3.3× less per token, which makes it the better buy when Grok 4.5's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/grok-4-5-vs-qwen3-5-plus
- Last updated: 2026-10-10
- Shared benchmarks: 9

## Summary

- They share 9 benchmarks with published results for both. Grok 4.5 scores higher in 4 categories and Qwen3.5 Plus in 0 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.5 leads 56.1 to 32.8.
- The biggest single-benchmark swing is SimpleQA Verified: 48.3% for Grok 4.5 and 25.4% for Qwen3.5 Plus.
- Qwen3.5 Plus is cheaper at $0.40 / $2.40 per million input/output tokens, against $2 / $6 for Grok 4.5.
- Qwen3.5 Plus accepts more context: 1M tokens versus 500K.

## Snapshot

| | Grok 4.5 | Qwen3.5 Plus |
|---|---|---|
| Provider | xAI | Alibaba (Qwen) |
| Noometry Index | 55.0 | 42.9 |
| Rank | 25 | 106 |
| Context | 500K | 1M |
| Input $/M | $2 | $0.40 |
| Output $/M | $6 | $2.40 |
| Weights | Proprietary | Proprietary |

## Coding

- Grok 4.5: 52.2 (#35)
- Qwen3.5 Plus: —

| Benchmark | Grok 4.5 | Qwen3.5 Plus |
|---|---|---|
| ALE-Bench | 1,309 | 621.92 |
| DeepSWE | 53.8% | — |
| FrontierCode | 42.4% | — |
| LMArena WebDev | 1553 | — |
| SciCode | 54.1% | — |
| WeirdML | 46.4% | — |
| LMArena Coding | 1474 | — |

## Agentic & Tool Use

- Grok 4.5: 44.4 (#17)
- Qwen3.5 Plus: —

| Benchmark | Grok 4.5 | Qwen3.5 Plus |
|---|---|---|
| Vending-Bench 2 | 3,887 | 0.54 |
| APEX-Agents | 56.2% | — |
| τ²-bench Banking | 47.9% | — |
| PostTrainBench | 23.4% | — |
| GBAEval | 65.4% | — |
| GDP.pdf | 14% | — |
| LMArena Search | 1213 | — |

## Reasoning

- Grok 4.5: 56.1 (#25)
- Qwen3.5 Plus: 32.8 (#74)

| Benchmark | Grok 4.5 | Qwen3.5 Plus |
|---|---|---|
| Chess Puzzles | 36% | 22% |
| DTBench | 96.5% | 80.5% |
| LMCA | 45.2% | 36.4% |
| Epoch Capabilities Index | 153.92 | 146.78 |
| ARC-AGI-2 | 52.6% | — |
| SimpleBench | 70% | — |
| Kagi LLM Benchmark | 83.5% | — |
| NYT Connections (extended) | 79.9% | — |
| ARC-AGI-1 | 87.2% | — |
| CritPt | 15.4% | — |
| LMArena Hard Prompts | 1462 | — |
| Mystery Game Puzzles | — | 17% |
| Surface Evolver Bench | 74.4% | — |

## Math

- Grok 4.5: 60.9 (#35)
- Qwen3.5 Plus: 49.6 (#61)

| Benchmark | Grok 4.5 | Qwen3.5 Plus |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 97.8% | 86.7% |
| FrontierMath (Tiers 1-3) | 57.2% | — |
| FrontierMath Tier 4 | 24.4% | — |
| ProofBench | 31% | — |
| LMArena Math | 1459 | — |
| FrontierMath (Feb 2025 set) | — | 21% |
| FrontierMath Tier 4 (v1) | — | 2.1% |

## Knowledge

- Grok 4.5: 62.3 (#24)
- Qwen3.5 Plus: 46.0 (#83)

| Benchmark | Grok 4.5 | Qwen3.5 Plus |
|---|---|---|
| GPQA Diamond | 93.4% | 84.8% |
| SimpleQA Verified | 48.3% | 25.4% |
| Vectara Hallucination Rate | — | 10.7% |
| LMArena Expert | 1466 | — |

## Multimodal

- Grok 4.5: 37.6 (#72)
- Qwen3.5 Plus: —

| Benchmark | Grok 4.5 | Qwen3.5 Plus |
|---|---|---|
| LMArena Vision | 1288 | — |
| Blueprint-Bench 2 | 27.3% | — |
| Furniture Assembly | 22.5% | — |
| LMArena Document | 1452 | — |

## Multilingual

- Grok 4.5: 54.4 (#42)
- Qwen3.5 Plus: —

| Benchmark | Grok 4.5 | Qwen3.5 Plus |
|---|---|---|
| LMArena Non-English | 1440 | — |
| LMArena Chinese | 1496 | — |
| LMArena French | 1456 | — |
| LMArena German | 1446 | — |
| LMArena Japanese | 1428 | — |
| LMArena Korean | 1404 | — |
| LMArena Russian | 1448 | — |
| LMArena Spanish | 1450 | — |

## Instruction Following

- Grok 4.5: 76.0 (#48)
- Qwen3.5 Plus: —

| Benchmark | Grok 4.5 | Qwen3.5 Plus |
|---|---|---|
| LMArena Instruction Following | 1446 | — |

## Long Context

- Grok 4.5: 44.8 (#56)
- Qwen3.5 Plus: 43.0 (#113)

| Benchmark | Grok 4.5 | Qwen3.5 Plus |
|---|---|---|
| CL-bench | — | 19.8% |
| CL-bench Life | — | 12.4% |
| LMArena Longer Query | 1463 | — |

## Writing & Preference

- Grok 4.5: 65.8 (#42)
- Qwen3.5 Plus: —

| Benchmark | Grok 4.5 | Qwen3.5 Plus |
|---|---|---|
| LMArena Text | 1448 | — |
| LMArena Creative Writing | 1442 | — |
| EQ-Bench Creative Writing | 1579 | — |
| LMArena Multi-Turn | 1456 | — |

## FAQ

### Is Grok 4.5 better than Qwen3.5 Plus?

Grok 4.5 is the stronger model overall, scoring 55.0 to 42.9 on the Noometry Index. Qwen3.5 Plus costs 3.3× less per token, which makes it the better buy when Grok 4.5's lead doesn't matter for your workload.

### Which is cheaper, Grok 4.5 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; Grok 4.5 lists at $2 and $6.

### Which has the bigger context window?

Qwen3.5 Plus does, with 1M tokens against 500K.

### How many benchmarks do Grok 4.5 and Qwen3.5 Plus share?

9 benchmarks have published results for both models. Grok 4.5 has 52 scored results on Noometry and Qwen3.5 Plus has 15.