Model comparison
Amazon Nova Micro vs Claude Opus 4.1
Claude Opus 4.1 is the stronger model overall, scoring 41.0 to 30.4 on the Noometry Index. Amazon Nova Micro costs 490× less per token, which makes it the better buy when Claude Opus 4.1's lead doesn't matter for your workload.
Last verified . 18 shared benchmarks.
Summary
- They share 18 benchmarks with published results for both. Amazon Nova Micro scores higher in 1 category and Claude Opus 4.1 in 8 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Claude Opus 4.1 leads 62.4 to 39.5.
- The biggest single-benchmark swing is Vectara Hallucination Rate: 5.5% for Amazon Nova Micro and 11.8% for Claude Opus 4.1.
- Amazon Nova Micro is cheaper at $0.035 / $0.14 per million input/output tokens, against $15 / $75 for Claude Opus 4.1.
- Claude Opus 4.1 accepts more context: 200K tokens versus 128K.
Side by side
| Amazon Nova Micro | Claude Opus 4.1 | |
|---|---|---|
| Provider | Amazon | Anthropic |
| Noometry Index | 30.4 | 41.0 |
| Released | 2024-12-03 | 2025-08-05 |
| Weights | Proprietary | Proprietary |
| Context window | 128K | 200K |
| Max output | 10K | 32K |
| Input $ / M tokens | $0.035 | $15 |
| Output $ / M tokens | $0.14 | $75 |
| Results tracked | 32 | 48 |
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Category by category
Coding Claude Opus 4.1 leads
Amazon Nova Micro: 30.5 (#295), Claude Opus 4.1: 44.4 (#73)
| Benchmark | Amazon Nova Micro | Claude Opus 4.1 |
|---|---|---|
| LMArena Coding | 1218 | 1479 |
| SWE-bench Verified | — | 73.3% |
| LMArena WebDev | — | 1390 |
| WeirdML | — | 45.9% |
| LiveBench Coding | 20.2% | — |
| ALE-Bench | — | 674.77 |
| AlgoTune | — | 1.34 |
Agentic & Tool Use Claude Opus 4.1 leads
Amazon Nova Micro: 22.1 (#132), Claude Opus 4.1: 35.0 (#41)
| Benchmark | Amazon Nova Micro | Claude Opus 4.1 |
|---|---|---|
| Terminal-Bench | — | 38% |
| Berkeley Function Calling Leaderboard | 22.3% | — |
| GDPval | — | 43.6% |
| Cybench | — | 42% |
| DeepResearch Bench | — | 48.3% |
| LMArena Search | — | 1148 |
| METR Time Horizons | — | 66.8% |
Reasoning Claude Opus 4.1 leads
Amazon Nova Micro: 17.4 (#294), Claude Opus 4.1: 32.2 (#76)
| Benchmark | Amazon Nova Micro | Claude Opus 4.1 |
|---|---|---|
| LMArena Hard Prompts | 1191 | 1443 |
| SimpleBench | — | 60% |
| Chess Puzzles | — | 7% |
| EnigmaEval | — | 7.2% |
| EBR-Bench | — | 7.9% |
| LiveBench Reasoning | 25.1% | — |
| Mystery Game Puzzles | — | 21% |
| DTBench | — | 80% |
| LiveBench Data Analysis | 34% | — |
| LMCA | — | 37.1% |
| Epoch Capabilities Index | — | 144.12 |
| ForecastBench | — | 62 |
| LiveBench | 29.6% | — |
Math Amazon Nova Micro leads
Amazon Nova Micro: 26.9 (#254), Claude Opus 4.1: 22.3 (#277)
| Benchmark | Amazon Nova Micro | Claude Opus 4.1 |
|---|---|---|
| LMArena Math | 1206 | 1431 |
| FrontierMath (Tiers 1-3) | — | 12.6% |
| FrontierMath Tier 4 | — | 2.4% |
| OTIS Mock AIME 2024-2025 | — | 68.9% |
| Omni-MATH | 21.4% | — |
| LiveBench Math | 34.5% | — |
| FrontierMath (Feb 2025 set) | — | 7.2% |
| FrontierMath Tier 4 (v1) | — | 4.2% |
Knowledge Claude Opus 4.1 leads
Amazon Nova Micro: 29.6 (#237), Claude Opus 4.1: 42.0 (#101)
| Benchmark | Amazon Nova Micro | Claude Opus 4.1 |
|---|---|---|
| Vectara Hallucination Rate | 5.5% | 11.8% |
| LMArena Expert | 1184 | 1439 |
| GPQA Diamond | — | 77.3% |
| Humanity's Last Exam | — | 11.5% |
| MMLU-Pro | 51.1% | — |
| Confabulations | — | 17.1% |
| GPQA (HELM) | 38.3% | — |
| MMLU | 70.8% | — |
Multimodal Not comparable
Amazon Nova Micro: —, Claude Opus 4.1: 26.8 (#119)
| Benchmark | Amazon Nova Micro | Claude Opus 4.1 |
|---|---|---|
| VPCT | — | 35% |
Multilingual Claude Opus 4.1 leads
Amazon Nova Micro: 36.5 (#239), Claude Opus 4.1: 52.0 (#95)
| Benchmark | Amazon Nova Micro | Claude Opus 4.1 |
|---|---|---|
| LMArena Non-English | 1186 | 1405 |
| LMArena Chinese | 1209 | 1427 |
| LMArena French | 1238 | 1431 |
| LMArena German | 1192 | 1413 |
| LMArena Japanese | 1154 | 1378 |
| LMArena Korean | 1150 | 1380 |
| LMArena Russian | 1185 | 1422 |
| LMArena Spanish | 1225 | 1448 |
Instruction Following Claude Opus 4.1 leads
Amazon Nova Micro: 56.3 (#272), Claude Opus 4.1: 75.6 (#58)
| Benchmark | Amazon Nova Micro | Claude Opus 4.1 |
|---|---|---|
| LMArena Instruction Following | 1174 | 1435 |
| LiveBench Instruction Following | 48% | — |
| IFEval | 76% | — |
Long Context Claude Opus 4.1 leads
Amazon Nova Micro: 36.5 (#229), Claude Opus 4.1: 44.5 (#63)
| Benchmark | Amazon Nova Micro | Claude Opus 4.1 |
|---|---|---|
| LMArena Longer Query | 1205 | 1455 |
Writing & Preference Claude Opus 4.1 leads
Amazon Nova Micro: 39.5 (#247), Claude Opus 4.1: 62.4 (#74)
| Benchmark | Amazon Nova Micro | Claude Opus 4.1 |
|---|---|---|
| LMArena Text | 1208 | 1419 |
| LMArena Creative Writing | 1172 | 1412 |
| LMArena Multi-Turn | 1178 | 1444 |
| Short-Story Creative Writing | — | 84.7% |
| WildBench | 74.3% | — |
| LiveBench Language | 15.8% | — |
Frequently asked questions
Is Amazon Nova Micro better than Claude Opus 4.1?
Claude Opus 4.1 is the stronger model overall, scoring 41.0 to 30.4 on the Noometry Index. Amazon Nova Micro costs 490× less per token, which makes it the better buy when Claude Opus 4.1's lead doesn't matter for your workload.
Which is cheaper, Amazon Nova Micro or Claude Opus 4.1?
Amazon Nova Micro is cheaper. It lists at $0.035 per million input tokens and $0.14 per million output tokens; Claude Opus 4.1 lists at $15 and $75.
Is Amazon Nova Micro or Claude Opus 4.1 better for coding?
Claude Opus 4.1 scores higher on coding benchmarks: 44.4 versus 30.5 in the Noometry coding category.
Which has the bigger context window?
Claude Opus 4.1 does, with 200K tokens against 128K.
How many benchmarks do Amazon Nova Micro and Claude Opus 4.1 share?
18 benchmarks have published results for both models. Amazon Nova Micro has 32 scored results on Noometry and Claude Opus 4.1 has 48.