# Grok 4.5 vs Qwen1.5 4b Chat

> Grok 4.5 is the stronger model overall, scoring 55.0 to 28.8 on the Noometry Index.

- Canonical page: https://noometry.com/compare/grok-4-5-vs-qwen1-5-4b-chat
- Last updated: 2026-10-12
- Shared benchmarks: 13

## Summary

- They share 13 benchmarks with published results for both. Grok 4.5 scores higher in 8 categories and Qwen1.5 4b Chat in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Grok 4.5 leads 65.8 to 23.8.
- Qwen1.5 4b Chat has downloadable open weights; the other is API-only.

## Snapshot

| | Grok 4.5 | Qwen1.5 4b Chat |
|---|---|---|
| Provider | xAI | Alibaba (Qwen) |
| Noometry Index | 55.0 | 28.8 |
| Rank | 25 | 322 |
| Context | 500K | — |
| Input $/M | $2 | — |
| Output $/M | $6 | — |
| Weights | Proprietary | Open |

## Coding

- Grok 4.5: 52.2 (#35)
- Qwen1.5 4b Chat: 29.1 (#308)

| Benchmark | Grok 4.5 | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Coding | 1474 | 999 |
| DeepSWE | 53.8% | — |
| FrontierCode | 42.4% | — |
| LMArena WebDev | 1553 | — |
| SciCode | 54.1% | — |
| WeirdML | 46.4% | — |
| ALE-Bench | 1,309 | — |

## Agentic & Tool Use

- Grok 4.5: 44.4 (#17)
- Qwen1.5 4b Chat: —

| Benchmark | Grok 4.5 | Qwen1.5 4b Chat |
|---|---|---|
| APEX-Agents | 56.2% | — |
| τ²-bench Banking | 47.9% | — |
| PostTrainBench | 23.4% | — |
| GBAEval | 65.4% | — |
| GDP.pdf | 14% | — |
| LMArena Search | 1213 | — |
| Vending-Bench 2 | 3,887 | — |

## Reasoning

- Grok 4.5: 56.1 (#25)
- Qwen1.5 4b Chat: 18.5 (#279)

| Benchmark | Grok 4.5 | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Hard Prompts | 1462 | 976 |
| 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% | — |
| Chess Puzzles | 36% | — |
| DTBench | 96.5% | — |
| LMCA | 45.2% | — |
| Surface Evolver Bench | 74.4% | — |
| Epoch Capabilities Index | 153.92 | — |

## Math

- Grok 4.5: 60.9 (#35)
- Qwen1.5 4b Chat: 30.4 (#234)

| Benchmark | Grok 4.5 | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Math | 1459 | 1026 |
| FrontierMath (Tiers 1-3) | 57.2% | — |
| FrontierMath Tier 4 | 24.4% | — |
| OTIS Mock AIME 2024-2025 | 97.8% | — |
| ProofBench | 31% | — |

## Knowledge

- Grok 4.5: 62.3 (#24)
- Qwen1.5 4b Chat: 26.7 (#255)

| Benchmark | Grok 4.5 | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Expert | 1466 | 980 |
| GPQA Diamond | 93.4% | — |
| SimpleQA Verified | 48.3% | — |

## Multimodal

- Grok 4.5: 37.6 (#72)
- Qwen1.5 4b Chat: —

| Benchmark | Grok 4.5 | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Vision | 1288 | — |
| Blueprint-Bench 2 | 27.3% | — |
| Furniture Assembly | 22.5% | — |
| LMArena Document | 1452 | — |

## Multilingual

- Grok 4.5: 54.4 (#42)
- Qwen1.5 4b Chat: 24.1 (#290)

| Benchmark | Grok 4.5 | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Non-English | 1440 | 979 |
| LMArena Chinese | 1496 | 1024 |
| LMArena German | 1446 | 902 |
| LMArena Russian | 1448 | 952 |
| LMArena French | 1456 | — |
| LMArena Japanese | 1428 | — |
| LMArena Korean | 1404 | — |
| LMArena Spanish | 1450 | — |

## Instruction Following

- Grok 4.5: 76.0 (#48)
- Qwen1.5 4b Chat: 49.0 (#300)

| Benchmark | Grok 4.5 | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Instruction Following | 1446 | 978 |

## Long Context

- Grok 4.5: 44.8 (#56)
- Qwen1.5 4b Chat: 30.1 (#290)

| Benchmark | Grok 4.5 | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Longer Query | 1463 | 988 |

## Writing & Preference

- Grok 4.5: 65.8 (#42)
- Qwen1.5 4b Chat: 23.8 (#309)

| Benchmark | Grok 4.5 | Qwen1.5 4b Chat |
|---|---|---|
| LMArena Text | 1448 | 997 |
| LMArena Creative Writing | 1442 | 969 |
| LMArena Multi-Turn | 1456 | 977 |
| EQ-Bench Creative Writing | 1579 | — |

## FAQ

### Is Grok 4.5 better than Qwen1.5 4b Chat?

Grok 4.5 is the stronger model overall, scoring 55.0 to 28.8 on the Noometry Index.

### Is Grok 4.5 or Qwen1.5 4b Chat better for coding?

Grok 4.5 scores higher on coding benchmarks: 52.2 versus 29.1 in the Noometry coding category.

### How many benchmarks do Grok 4.5 and Qwen1.5 4b Chat share?

13 benchmarks have published results for both models. Grok 4.5 has 52 scored results on Noometry and Qwen1.5 4b Chat has 13.