Model comparison
Amazon Nova Micro vs Grok 4.5
Grok 4.5 is the stronger model overall, scoring 55.0 to 30.4 on the Noometry Index. Amazon Nova Micro costs 49× less per token, which makes it the better buy when Grok 4.5's lead doesn't matter for your workload.
Last verified . 17 shared benchmarks.
Summary
- They share 17 benchmarks with published results for both. Amazon Nova Micro scores higher in 0 categories and Grok 4.5 in 9 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.5 leads 56.1 to 17.4.
- Amazon Nova Micro is cheaper at $0.035 / $0.14 per million input/output tokens, against $2 / $6 for Grok 4.5.
- Grok 4.5 accepts more context: 500K tokens versus 128K.
Side by side
| Amazon Nova Micro | Grok 4.5 | |
|---|---|---|
| Provider | Amazon | xAI |
| Noometry Index | 30.4 | 55.0 |
| Released | 2024-12-03 | 2026-07-08 |
| Weights | Proprietary | Proprietary |
| Context window | 128K | 500K |
| Max output | 10K | 500K |
| Input $ / M tokens | $0.035 | $2 |
| Output $ / M tokens | $0.14 | $6 |
| Results tracked | 32 | 52 |
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Category by category
Coding Grok 4.5 leads
Amazon Nova Micro: 30.5 (#295), Grok 4.5: 52.2 (#35)
| Benchmark | Amazon Nova Micro | Grok 4.5 |
|---|---|---|
| LMArena Coding | 1218 | 1474 |
| DeepSWE | — | 53.8% |
| FrontierCode | — | 42.4% |
| LMArena WebDev | — | 1553 |
| SciCode | — | 54.1% |
| WeirdML | — | 46.4% |
| LiveBench Coding | 20.2% | — |
| ALE-Bench | — | 1,309 |
Agentic & Tool Use Grok 4.5 leads
Amazon Nova Micro: 22.1 (#132), Grok 4.5: 44.4 (#17)
| Benchmark | Amazon Nova Micro | Grok 4.5 |
|---|---|---|
| APEX-Agents | — | 56.2% |
| Berkeley Function Calling Leaderboard | 22.3% | — |
| 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 Micro: 17.4 (#294), Grok 4.5: 56.1 (#25)
| Benchmark | Amazon Nova Micro | Grok 4.5 |
|---|---|---|
| LMArena Hard Prompts | 1191 | 1462 |
| 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 | 25.1% | — |
| DTBench | — | 96.5% |
| LiveBench Data Analysis | 34% | — |
| LMCA | — | 45.2% |
| Surface Evolver Bench | — | 74.4% |
| Epoch Capabilities Index | — | 153.92 |
| LiveBench | 29.6% | — |
Math Grok 4.5 leads
Amazon Nova Micro: 26.9 (#254), Grok 4.5: 60.9 (#35)
| Benchmark | Amazon Nova Micro | Grok 4.5 |
|---|---|---|
| LMArena Math | 1206 | 1459 |
| FrontierMath (Tiers 1-3) | — | 57.2% |
| FrontierMath Tier 4 | — | 24.4% |
| OTIS Mock AIME 2024-2025 | — | 97.8% |
| ProofBench | — | 31% |
| Omni-MATH | 21.4% | — |
| LiveBench Math | 34.5% | — |
Knowledge Grok 4.5 leads
Amazon Nova Micro: 29.6 (#237), Grok 4.5: 62.3 (#24)
| Benchmark | Amazon Nova Micro | Grok 4.5 |
|---|---|---|
| LMArena Expert | 1184 | 1466 |
| GPQA Diamond | — | 93.4% |
| SimpleQA Verified | — | 48.3% |
| MMLU-Pro | 51.1% | — |
| Vectara Hallucination Rate | 5.5% | — |
| GPQA (HELM) | 38.3% | — |
| MMLU | 70.8% | — |
Multimodal Not comparable
Amazon Nova Micro: —, Grok 4.5: 37.6 (#72)
| Benchmark | Amazon Nova Micro | Grok 4.5 |
|---|---|---|
| LMArena Vision | — | 1288 |
| Blueprint-Bench 2 | — | 27.3% |
| Furniture Assembly | — | 22.5% |
| LMArena Document | — | 1452 |
Multilingual Grok 4.5 leads
Amazon Nova Micro: 36.5 (#239), Grok 4.5: 54.4 (#42)
| Benchmark | Amazon Nova Micro | Grok 4.5 |
|---|---|---|
| LMArena Non-English | 1186 | 1440 |
| LMArena Chinese | 1209 | 1496 |
| LMArena French | 1238 | 1456 |
| LMArena German | 1192 | 1446 |
| LMArena Japanese | 1154 | 1428 |
| LMArena Korean | 1150 | 1404 |
| LMArena Russian | 1185 | 1448 |
| LMArena Spanish | 1225 | 1450 |
Instruction Following Grok 4.5 leads
Amazon Nova Micro: 56.3 (#272), Grok 4.5: 76.0 (#48)
| Benchmark | Amazon Nova Micro | Grok 4.5 |
|---|---|---|
| LMArena Instruction Following | 1174 | 1446 |
| LiveBench Instruction Following | 48% | — |
| IFEval | 76% | — |
Long Context Grok 4.5 leads
Amazon Nova Micro: 36.5 (#229), Grok 4.5: 44.8 (#56)
| Benchmark | Amazon Nova Micro | Grok 4.5 |
|---|---|---|
| LMArena Longer Query | 1205 | 1463 |
Writing & Preference Grok 4.5 leads
Amazon Nova Micro: 39.5 (#247), Grok 4.5: 65.8 (#42)
| Benchmark | Amazon Nova Micro | Grok 4.5 |
|---|---|---|
| LMArena Text | 1208 | 1448 |
| LMArena Creative Writing | 1172 | 1442 |
| LMArena Multi-Turn | 1178 | 1456 |
| EQ-Bench Creative Writing | — | 1579 |
| WildBench | 74.3% | — |
| LiveBench Language | 15.8% | — |
Frequently asked questions
Is Amazon Nova Micro better than Grok 4.5?
Grok 4.5 is the stronger model overall, scoring 55.0 to 30.4 on the Noometry Index. Amazon Nova Micro costs 49× 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 Micro or Grok 4.5?
Amazon Nova Micro is cheaper. It lists at $0.035 per million input tokens and $0.14 per million output tokens; Grok 4.5 lists at $2 and $6.
Is Amazon Nova Micro or Grok 4.5 better for coding?
Grok 4.5 scores higher on coding benchmarks: 52.2 versus 30.5 in the Noometry coding category.
Which has the bigger context window?
Grok 4.5 does, with 500K tokens against 128K.
How many benchmarks do Amazon Nova Micro and Grok 4.5 share?
17 benchmarks have published results for both models. Amazon Nova Micro has 32 scored results on Noometry and Grok 4.5 has 52.