Model comparison
Amazon Nova Micro vs GPT-5.3 Chat
GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 30.4 on the Noometry Index. Amazon Nova Micro costs 79× less per token, which makes it the better buy when GPT-5.3 Chat'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 GPT-5.3 Chat in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where GPT-5.3 Chat leads 63.1 to 39.5.
- Amazon Nova Micro is cheaper at $0.035 / $0.14 per million input/output tokens, against $1.75 / $14 for GPT-5.3 Chat.
Side by side
| Amazon Nova Micro | GPT-5.3 Chat | |
|---|---|---|
| Provider | Amazon | OpenAI |
| Noometry Index | 30.4 | 42.8 |
| Released | 2024-12-03 | 2026-03-03 |
| Weights | Proprietary | Proprietary |
| Context window | 128K | 128K |
| Max output | 10K | 16K |
| Input $ / M tokens | $0.035 | $1.75 |
| Output $ / M tokens | $0.14 | $14 |
| Results tracked | 32 | 18 |
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Category by category
Coding GPT-5.3 Chat leads
Amazon Nova Micro: 30.5 (#295), GPT-5.3 Chat: 41.4 (#124)
| Benchmark | Amazon Nova Micro | GPT-5.3 Chat |
|---|---|---|
| LMArena Coding | 1218 | 1408 |
| LiveBench Coding | 20.2% | — |
Agentic & Tool Use Not comparable
Amazon Nova Micro: 22.1 (#132), GPT-5.3 Chat: —
| Benchmark | Amazon Nova Micro | GPT-5.3 Chat |
|---|---|---|
| Berkeley Function Calling Leaderboard | 22.3% | — |
Reasoning GPT-5.3 Chat leads
Amazon Nova Micro: 17.4 (#294), GPT-5.3 Chat: 28.5 (#102)
| Benchmark | Amazon Nova Micro | GPT-5.3 Chat |
|---|---|---|
| LMArena Hard Prompts | 1191 | 1399 |
| LiveBench Reasoning | 25.1% | — |
| LiveBench Data Analysis | 34% | — |
| LiveBench | 29.6% | — |
Math GPT-5.3 Chat leads
Amazon Nova Micro: 26.9 (#254), GPT-5.3 Chat: 38.2 (#142)
| Benchmark | Amazon Nova Micro | GPT-5.3 Chat |
|---|---|---|
| LMArena Math | 1206 | 1389 |
| Omni-MATH | 21.4% | — |
| LiveBench Math | 34.5% | — |
Knowledge GPT-5.3 Chat leads
Amazon Nova Micro: 29.6 (#237), GPT-5.3 Chat: 38.8 (#140)
| Benchmark | Amazon Nova Micro | GPT-5.3 Chat |
|---|---|---|
| LMArena Expert | 1184 | 1397 |
| MMLU-Pro | 51.1% | — |
| Vectara Hallucination Rate | 5.5% | — |
| GPQA (HELM) | 38.3% | — |
| MMLU | 70.8% | — |
Multilingual GPT-5.3 Chat leads
Amazon Nova Micro: 36.5 (#239), GPT-5.3 Chat: 50.3 (#124)
| Benchmark | Amazon Nova Micro | GPT-5.3 Chat |
|---|---|---|
| LMArena Non-English | 1186 | 1382 |
| LMArena Chinese | 1209 | 1432 |
| LMArena French | 1238 | 1397 |
| LMArena German | 1192 | 1384 |
| LMArena Japanese | 1154 | 1352 |
| LMArena Korean | 1150 | 1346 |
| LMArena Russian | 1185 | 1400 |
| LMArena Spanish | 1225 | 1371 |
Instruction Following GPT-5.3 Chat leads
Amazon Nova Micro: 56.3 (#272), GPT-5.3 Chat: 72.8 (#129)
| Benchmark | Amazon Nova Micro | GPT-5.3 Chat |
|---|---|---|
| LMArena Instruction Following | 1174 | 1378 |
| LiveBench Instruction Following | 48% | — |
| IFEval | 76% | — |
Long Context GPT-5.3 Chat leads
Amazon Nova Micro: 36.5 (#229), GPT-5.3 Chat: 42.6 (#120)
| Benchmark | Amazon Nova Micro | GPT-5.3 Chat |
|---|---|---|
| LMArena Longer Query | 1205 | 1396 |
Writing & Preference GPT-5.3 Chat leads
Amazon Nova Micro: 39.5 (#247), GPT-5.3 Chat: 63.1 (#68)
| Benchmark | Amazon Nova Micro | GPT-5.3 Chat |
|---|---|---|
| LMArena Text | 1208 | 1389 |
| LMArena Creative Writing | 1172 | 1355 |
| LMArena Multi-Turn | 1178 | 1412 |
| EQ-Bench Creative Writing | — | 1690 |
| WildBench | 74.3% | — |
| LiveBench Language | 15.8% | — |
Frequently asked questions
Is Amazon Nova Micro better than GPT-5.3 Chat?
GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 30.4 on the Noometry Index. Amazon Nova Micro costs 79× less per token, which makes it the better buy when GPT-5.3 Chat's lead doesn't matter for your workload.
Which is cheaper, Amazon Nova Micro or GPT-5.3 Chat?
Amazon Nova Micro is cheaper. It lists at $0.035 per million input tokens and $0.14 per million output tokens; GPT-5.3 Chat lists at $1.75 and $14.
Is Amazon Nova Micro or GPT-5.3 Chat better for coding?
GPT-5.3 Chat scores higher on coding benchmarks: 41.4 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 GPT-5.3 Chat share?
17 benchmarks have published results for both models. Amazon Nova Micro has 32 scored results on Noometry and GPT-5.3 Chat has 18.