Model comparison
Amazon Nova Pro vs Grok 4.3
Grok 4.3 is the stronger model overall, scoring 43.8 to 31.0 on the Noometry Index.
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 4.3 in 10 categories; 10 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Grok 4.3 leads 52.5 to 27.4.
- Amazon Nova Pro is cheaper at $0.80 / $3.20 per million input/output tokens, against $1.25 / $2.50 for Grok 4.3.
- Grok 4.3 accepts more context: 1M tokens versus 300K.
Side by side
| Amazon Nova Pro | Grok 4.3 | |
|---|---|---|
| Provider | Amazon | xAI |
| Noometry Index | 31.0 | 43.8 |
| Released | 2024-12-03 | 2026-04-17 |
| Weights | Proprietary | Proprietary |
| Context window | 300K | 1M |
| Max output | 10K | 30K |
| Input $ / M tokens | $0.80 | $1.25 |
| Output $ / M tokens | $3.20 | $2.50 |
| Results tracked | 38 | 40 |
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Category by category
Coding Grok 4.3 leads
Amazon Nova Pro: 35.1 (#229), Grok 4.3: 41.6 (#121)
| Benchmark | Amazon Nova Pro | Grok 4.3 |
|---|---|---|
| LMArena Coding | 1270 | 1415 |
| LMArena WebDev | — | 1357 |
| SciCode | — | 47.3% |
| WeirdML | — | 49.9% |
| LiveBench Coding | 38.1% | — |
| ALE-Bench | — | 944.17 |
Agentic & Tool Use Grok 4.3 leads
Amazon Nova Pro: 16.7 (#147), Grok 4.3: 27.7 (#99)
| Benchmark | Amazon Nova Pro | Grok 4.3 |
|---|---|---|
| Berkeley Function Calling Leaderboard | 25% | — |
| TheAgentCompany | 1.7% | — |
| GDP.pdf | — | 8% |
| LMArena Search | — | 1165 |
| Vending-Bench 2 | — | 35.26 |
Reasoning Grok 4.3 leads
Amazon Nova Pro: 20.0 (#243), Grok 4.3: 35.9 (#68)
| Benchmark | Amazon Nova Pro | Grok 4.3 |
|---|---|---|
| LMArena Hard Prompts | 1246 | 1396 |
| Epoch Capabilities Index | 123.8 | 149.16 |
| NYT Connections (extended) | — | 55.2% |
| CritPt | — | 8% |
| Chess Puzzles | — | 25% |
| LiveBench Reasoning | 32.6% | — |
| DTBench | — | 90.7% |
| LiveBench Data Analysis | 48.3% | — |
| LMCA | — | 38.3% |
| ForecastBench | — | 60.3 |
| LiveBench | 43.5% | — |
Math Grok 4.3 leads
Amazon Nova Pro: 28.5 (#243), Grok 4.3: 46.0 (#74)
| Benchmark | Amazon Nova Pro | Grok 4.3 |
|---|---|---|
| LMArena Math | 1252 | 1388 |
| FrontierMath (Tiers 1-3) | — | 42.8% |
| FrontierMath Tier 4 | — | 14.6% |
| OTIS Mock AIME 2024-2025 | — | 93.3% |
| ProofBench | — | 11% |
| Omni-MATH | 24.2% | — |
| LiveBench Math | 38% | — |
Knowledge Grok 4.3 leads
Amazon Nova Pro: 27.4 (#250), Grok 4.3: 52.5 (#62)
| Benchmark | Amazon Nova Pro | Grok 4.3 |
|---|---|---|
| LMArena Expert | 1211 | 1385 |
| GPQA Diamond | — | 88.8% |
| Humanity's Last Exam | 4.4% | — |
| SimpleQA Verified | — | 33.2% |
| MMLU-Pro | 67.3% | — |
| Confabulations | 30.1% | — |
| Vectara Hallucination Rate | 5.1% | — |
| GPQA (HELM) | 44.6% | — |
| MMLU | 82% | — |
Multimodal Grok 4.3 leads
Amazon Nova Pro: 25.0 (#126), Grok 4.3: 31.6 (#104)
| Benchmark | Amazon Nova Pro | Grok 4.3 |
|---|---|---|
| LMArena Vision | 980 | 1229 |
| Blueprint-Bench 2 | — | 0% |
Multilingual Grok 4.3 leads
Amazon Nova Pro: 39.7 (#223), Grok 4.3: 50.5 (#120)
| Benchmark | Amazon Nova Pro | Grok 4.3 |
|---|---|---|
| LMArena Non-English | 1234 | 1385 |
| LMArena Chinese | 1244 | 1422 |
| LMArena French | 1271 | 1412 |
| LMArena German | 1243 | 1395 |
| LMArena Japanese | 1200 | 1379 |
| LMArena Korean | 1203 | 1356 |
| LMArena Russian | 1240 | 1399 |
| LMArena Spanish | 1182 | 1398 |
Instruction Following Grok 4.3 leads
Amazon Nova Pro: 64.9 (#226), Grok 4.3: 72.1 (#140)
| Benchmark | Amazon Nova Pro | Grok 4.3 |
|---|---|---|
| LMArena Instruction Following | 1235 | 1366 |
| LiveBench Instruction Following | 67.1% | — |
| IFEval | 81.5% | — |
Long Context Grok 4.3 leads
Amazon Nova Pro: 38.1 (#205), Grok 4.3: 42.5 (#123)
| Benchmark | Amazon Nova Pro | Grok 4.3 |
|---|---|---|
| LMArena Longer Query | 1255 | 1393 |
Writing & Preference Grok 4.3 leads
Amazon Nova Pro: 43.9 (#226), Grok 4.3: 58.5 (#118)
| Benchmark | Amazon Nova Pro | Grok 4.3 |
|---|---|---|
| LMArena Text | 1259 | 1397 |
| LMArena Creative Writing | 1212 | 1380 |
| LMArena Multi-Turn | 1246 | 1406 |
| Short-Story Creative Writing | 60.5% | — |
| WildBench | 77.7% | — |
| EQ-Bench 4 | — | 1075 |
| LiveBench Language | 37% | — |
Frequently asked questions
Is Amazon Nova Pro better than Grok 4.3?
Grok 4.3 is the stronger model overall, scoring 43.8 to 31.0 on the Noometry Index.
Which is cheaper, Amazon Nova Pro or Grok 4.3?
Amazon Nova Pro is cheaper. It lists at $0.80 per million input tokens and $3.20 per million output tokens; Grok 4.3 lists at $1.25 and $2.50.
Is Amazon Nova Pro or Grok 4.3 better for coding?
Grok 4.3 scores higher on coding benchmarks: 41.6 versus 35.1 in the Noometry coding category.
Which has the bigger context window?
Grok 4.3 does, with 1M tokens against 300K.
How many benchmarks do Amazon Nova Pro and Grok 4.3 share?
19 benchmarks have published results for both models. Amazon Nova Pro has 38 scored results on Noometry and Grok 4.3 has 40.