Model comparison
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.
Last verified . 9 shared benchmarks.
Alibaba (Qwen)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.
Side by side
| Grok 4.5 | Qwen3.5 Plus | |
|---|---|---|
| Provider | xAI | Alibaba (Qwen) |
| Noometry Index | 55.0 | 42.9 |
| Released | 2026-07-08 | 2026-02-16 |
| Weights | Proprietary | Proprietary |
| Context window | 500K | 1M |
| Max output | 500K | 66K |
| Input $ / M tokens | $2 | $0.40 |
| Output $ / M tokens | $6 | $2.40 |
| Results tracked | 52 | 15 |
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Category by category
Coding Not comparable
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 Not comparable
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 leads
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 leads
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 leads
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 Not comparable
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 Not comparable
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 Not comparable
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 leads
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 Not comparable
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 | — |
Frequently asked questions
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.