Model comparison
Amazon Nova Pro vs Grok 4.5
Grok 4.5 is the stronger model overall, scoring 55.0 to 31.0 on the Noometry Index. Amazon Nova Pro costs 2.1× less per token, which makes it the better buy when Grok 4.5's lead doesn't matter for your workload.
Last verified . 19 shared benchmarks.
Summary
- They share 19 benchmarks with published results for both. Amazon Nova Pro scores higher in 0 categories and Grok 4.5 in 10 categories; 10 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.5 leads 56.1 to 20.0.
- Amazon Nova Pro is cheaper at $0.80 / $3.20 per million input/output tokens, against $2 / $6 for Grok 4.5.
- Grok 4.5 accepts more context: 500K tokens versus 300K.
Side by side
| Amazon Nova Pro | Grok 4.5 | |
|---|---|---|
| Provider | Amazon | xAI |
| Noometry Index | 31.0 | 55.0 |
| Released | 2024-12-03 | 2026-07-08 |
| Weights | Proprietary | Proprietary |
| Context window | 300K | 500K |
| Max output | 10K | 500K |
| Input $ / M tokens | $0.80 | $2 |
| Output $ / M tokens | $3.20 | $6 |
| Results tracked | 38 | 52 |
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Category by category
Coding Grok 4.5 leads
Amazon Nova Pro: 35.1 (#229), Grok 4.5: 52.2 (#35)
| Benchmark | Amazon Nova Pro | Grok 4.5 |
|---|---|---|
| LMArena Coding | 1270 | 1474 |
| DeepSWE | — | 53.8% |
| FrontierCode | — | 42.4% |
| LMArena WebDev | — | 1553 |
| SciCode | — | 54.1% |
| WeirdML | — | 46.4% |
| LiveBench Coding | 38.1% | — |
| ALE-Bench | — | 1,309 |
Agentic & Tool Use Grok 4.5 leads
Amazon Nova Pro: 16.7 (#147), Grok 4.5: 44.4 (#17)
| Benchmark | Amazon Nova Pro | Grok 4.5 |
|---|---|---|
| APEX-Agents | — | 56.2% |
| Berkeley Function Calling Leaderboard | 25% | — |
| TheAgentCompany | 1.7% | — |
| 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 leads
Amazon Nova Pro: 20.0 (#243), Grok 4.5: 56.1 (#25)
| Benchmark | Amazon Nova Pro | Grok 4.5 |
|---|---|---|
| LMArena Hard Prompts | 1246 | 1462 |
| Epoch Capabilities Index | 123.8 | 153.92 |
| 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% |
| LiveBench Reasoning | 32.6% | — |
| DTBench | — | 96.5% |
| LiveBench Data Analysis | 48.3% | — |
| LMCA | — | 45.2% |
| Surface Evolver Bench | — | 74.4% |
| LiveBench | 43.5% | — |
Math Grok 4.5 leads
Amazon Nova Pro: 28.5 (#243), Grok 4.5: 60.9 (#35)
| Benchmark | Amazon Nova Pro | Grok 4.5 |
|---|---|---|
| LMArena Math | 1252 | 1459 |
| FrontierMath (Tiers 1-3) | — | 57.2% |
| FrontierMath Tier 4 | — | 24.4% |
| OTIS Mock AIME 2024-2025 | — | 97.8% |
| ProofBench | — | 31% |
| Omni-MATH | 24.2% | — |
| LiveBench Math | 38% | — |
Knowledge Grok 4.5 leads
Amazon Nova Pro: 27.4 (#250), Grok 4.5: 62.3 (#24)
| Benchmark | Amazon Nova Pro | Grok 4.5 |
|---|---|---|
| LMArena Expert | 1211 | 1466 |
| GPQA Diamond | — | 93.4% |
| Humanity's Last Exam | 4.4% | — |
| SimpleQA Verified | — | 48.3% |
| MMLU-Pro | 67.3% | — |
| Confabulations | 30.1% | — |
| Vectara Hallucination Rate | 5.1% | — |
| GPQA (HELM) | 44.6% | — |
| MMLU | 82% | — |
Multimodal Grok 4.5 leads
Amazon Nova Pro: 25.0 (#126), Grok 4.5: 37.6 (#72)
| Benchmark | Amazon Nova Pro | Grok 4.5 |
|---|---|---|
| LMArena Vision | 980 | 1288 |
| Blueprint-Bench 2 | — | 27.3% |
| Furniture Assembly | — | 22.5% |
| LMArena Document | — | 1452 |
Multilingual Grok 4.5 leads
Amazon Nova Pro: 39.7 (#223), Grok 4.5: 54.4 (#42)
| Benchmark | Amazon Nova Pro | Grok 4.5 |
|---|---|---|
| LMArena Non-English | 1234 | 1440 |
| LMArena Chinese | 1244 | 1496 |
| LMArena French | 1271 | 1456 |
| LMArena German | 1243 | 1446 |
| LMArena Japanese | 1200 | 1428 |
| LMArena Korean | 1203 | 1404 |
| LMArena Russian | 1240 | 1448 |
| LMArena Spanish | 1182 | 1450 |
Instruction Following Grok 4.5 leads
Amazon Nova Pro: 64.9 (#226), Grok 4.5: 76.0 (#48)
| Benchmark | Amazon Nova Pro | Grok 4.5 |
|---|---|---|
| LMArena Instruction Following | 1235 | 1446 |
| LiveBench Instruction Following | 67.1% | — |
| IFEval | 81.5% | — |
Long Context Grok 4.5 leads
Amazon Nova Pro: 38.1 (#205), Grok 4.5: 44.8 (#56)
| Benchmark | Amazon Nova Pro | Grok 4.5 |
|---|---|---|
| LMArena Longer Query | 1255 | 1463 |
Writing & Preference Grok 4.5 leads
Amazon Nova Pro: 43.9 (#226), Grok 4.5: 65.8 (#42)
| Benchmark | Amazon Nova Pro | Grok 4.5 |
|---|---|---|
| LMArena Text | 1259 | 1448 |
| LMArena Creative Writing | 1212 | 1442 |
| LMArena Multi-Turn | 1246 | 1456 |
| Short-Story Creative Writing | 60.5% | — |
| EQ-Bench Creative Writing | — | 1579 |
| WildBench | 77.7% | — |
| LiveBench Language | 37% | — |
Frequently asked questions
Is Amazon Nova Pro better than Grok 4.5?
Grok 4.5 is the stronger model overall, scoring 55.0 to 31.0 on the Noometry Index. Amazon Nova Pro costs 2.1× less per token, which makes it the better buy when Grok 4.5's lead doesn't matter for your workload.
Which is cheaper, Amazon Nova Pro or Grok 4.5?
Amazon Nova Pro is cheaper. It lists at $0.80 per million input tokens and $3.20 per million output tokens; Grok 4.5 lists at $2 and $6.
Is Amazon Nova Pro or Grok 4.5 better for coding?
Grok 4.5 scores higher on coding benchmarks: 52.2 versus 35.1 in the Noometry coding category.
Which has the bigger context window?
Grok 4.5 does, with 500K tokens against 300K.
How many benchmarks do Amazon Nova Pro and Grok 4.5 share?
19 benchmarks have published results for both models. Amazon Nova Pro has 38 scored results on Noometry and Grok 4.5 has 52.