Model comparison
Amazon Nova Micro vs Grok 4.1 Fast
Grok 4.1 Fast is the stronger model overall, scoring 41.4 to 30.4 on the Noometry Index. Amazon Nova Micro costs 4.5× less per token, which makes it the better buy when Grok 4.1 Fast'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 Micro scores higher in 0 categories and Grok 4.1 Fast in 9 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.1 Fast leads 43.4 to 17.4.
- The biggest single-benchmark swing is Berkeley Function Calling Leaderboard: 22.3% for Amazon Nova Micro and 69.6% for Grok 4.1 Fast.
- Amazon Nova Micro is cheaper at $0.035 / $0.14 per million input/output tokens, against $0.20 / $0.50 for Grok 4.1 Fast.
Side by side
| Amazon Nova Micro | Grok 4.1 Fast | |
|---|---|---|
| Provider | Amazon | xAI |
| Noometry Index | 30.4 | 41.4 |
| Released | 2024-12-03 | 2025-06-27 |
| Weights | Proprietary | Proprietary |
| Context window | 128K | 128K |
| Max output | 10K | 30K |
| Input $ / M tokens | $0.035 | $0.20 |
| Output $ / M tokens | $0.14 | $0.50 |
| Results tracked | 32 | 32 |
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Category by category
Coding Grok 4.1 Fast leads
Amazon Nova Micro: 30.5 (#295), Grok 4.1 Fast: 34.1 (#245)
| Benchmark | Amazon Nova Micro | Grok 4.1 Fast |
|---|---|---|
| LMArena Coding | 1218 | 1411 |
| LMArena WebDev | — | 1242 |
| LiveBench Coding | 20.2% | — |
| ALE-Bench | — | 394.93 |
Agentic & Tool Use Grok 4.1 Fast leads
Amazon Nova Micro: 22.1 (#132), Grok 4.1 Fast: 36.3 (#39)
| Benchmark | Amazon Nova Micro | Grok 4.1 Fast |
|---|---|---|
| Berkeley Function Calling Leaderboard | 22.3% | 69.6% |
| τ²-bench Banking | — | 13.1% |
| LMArena Search | — | 1171 |
| Vending-Bench 2 | — | 1,107 |
Reasoning Grok 4.1 Fast leads
Amazon Nova Micro: 17.4 (#294), Grok 4.1 Fast: 43.4 (#49)
| Benchmark | Amazon Nova Micro | Grok 4.1 Fast |
|---|---|---|
| LMArena Hard Prompts | 1191 | 1407 |
| SimpleBench | — | 56% |
| NYT Connections (extended) | — | 87.4% |
| LiveBench Reasoning | 25.1% | — |
| DTBench | — | 87.7% |
| LiveBench Data Analysis | 34% | — |
| ForecastBench | — | 61 |
| LiveBench | 29.6% | — |
Math Grok 4.1 Fast leads
Amazon Nova Micro: 26.9 (#254), Grok 4.1 Fast: 31.9 (#221)
| Benchmark | Amazon Nova Micro | Grok 4.1 Fast |
|---|---|---|
| LMArena Math | 1206 | 1408 |
| MathArena Final-Answer Competitions | — | 60.9% |
| ProofBench | — | 4% |
| Omni-MATH | 21.4% | — |
| LiveBench Math | 34.5% | — |
Knowledge Grok 4.1 Fast leads
Amazon Nova Micro: 29.6 (#237), Grok 4.1 Fast: 33.1 (#207)
| Benchmark | Amazon Nova Micro | Grok 4.1 Fast |
|---|---|---|
| Vectara Hallucination Rate | 5.5% | 17.8% |
| LMArena Expert | 1184 | 1399 |
| MMLU-Pro | 51.1% | — |
| GPQA (HELM) | 38.3% | — |
| MMLU | 70.8% | — |
Multimodal Not comparable
Amazon Nova Micro: —, Grok 4.1 Fast: 37.0 (#76)
| Benchmark | Amazon Nova Micro | Grok 4.1 Fast |
|---|---|---|
| LMArena Vision | — | 1201 |
Multilingual Grok 4.1 Fast leads
Amazon Nova Micro: 36.5 (#239), Grok 4.1 Fast: 51.0 (#114)
| Benchmark | Amazon Nova Micro | Grok 4.1 Fast |
|---|---|---|
| LMArena Non-English | 1186 | 1391 |
| LMArena Chinese | 1209 | 1441 |
| LMArena French | 1238 | 1415 |
| LMArena German | 1192 | 1404 |
| LMArena Japanese | 1154 | 1349 |
| LMArena Korean | 1150 | 1361 |
| LMArena Russian | 1185 | 1387 |
| LMArena Spanish | 1225 | 1413 |
Instruction Following Grok 4.1 Fast leads
Amazon Nova Micro: 56.3 (#272), Grok 4.1 Fast: 72.7 (#133)
| Benchmark | Amazon Nova Micro | Grok 4.1 Fast |
|---|---|---|
| LMArena Instruction Following | 1174 | 1376 |
| LiveBench Instruction Following | 48% | — |
| IFEval | 76% | — |
Long Context Grok 4.1 Fast leads
Amazon Nova Micro: 36.5 (#229), Grok 4.1 Fast: 42.4 (#126)
| Benchmark | Amazon Nova Micro | Grok 4.1 Fast |
|---|---|---|
| LMArena Longer Query | 1205 | 1390 |
Writing & Preference Grok 4.1 Fast leads
Amazon Nova Micro: 39.5 (#247), Grok 4.1 Fast: 57.2 (#131)
| Benchmark | Amazon Nova Micro | Grok 4.1 Fast |
|---|---|---|
| LMArena Text | 1208 | 1408 |
| LMArena Creative Writing | 1172 | 1394 |
| LMArena Multi-Turn | 1178 | 1389 |
| EQ-Bench Creative Writing | — | 1327 |
| WildBench | 74.3% | — |
| LiveBench Language | 15.8% | — |
Frequently asked questions
Is Amazon Nova Micro better than Grok 4.1 Fast?
Grok 4.1 Fast is the stronger model overall, scoring 41.4 to 30.4 on the Noometry Index. Amazon Nova Micro costs 4.5× less per token, which makes it the better buy when Grok 4.1 Fast's lead doesn't matter for your workload.
Which is cheaper, Amazon Nova Micro or Grok 4.1 Fast?
Amazon Nova Micro is cheaper. It lists at $0.035 per million input tokens and $0.14 per million output tokens; Grok 4.1 Fast lists at $0.20 and $0.50.
Is Amazon Nova Micro or Grok 4.1 Fast better for coding?
Grok 4.1 Fast scores higher on coding benchmarks: 34.1 versus 30.5 in the Noometry coding category.
Which has the bigger context window?
Both accept 128K tokens.
How many benchmarks do Amazon Nova Micro and Grok 4.1 Fast share?
19 benchmarks have published results for both models. Amazon Nova Micro has 32 scored results on Noometry and Grok 4.1 Fast has 32.