Model comparison
Amazon Nova Pro vs GPT-5.3 Chat
GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 31.0 on the Noometry Index. Amazon Nova Pro costs 3.4× 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 Pro 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 43.9.
- Amazon Nova Pro is cheaper at $0.80 / $3.20 per million input/output tokens, against $1.75 / $14 for GPT-5.3 Chat.
- Amazon Nova Pro accepts more context: 300K tokens versus 128K.
Side by side
| Amazon Nova Pro | GPT-5.3 Chat | |
|---|---|---|
| Provider | Amazon | OpenAI |
| Noometry Index | 31.0 | 42.8 |
| Released | 2024-12-03 | 2026-03-03 |
| Weights | Proprietary | Proprietary |
| Context window | 300K | 128K |
| Max output | 10K | 16K |
| Input $ / M tokens | $0.80 | $1.75 |
| Output $ / M tokens | $3.20 | $14 |
| Results tracked | 38 | 18 |
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Category by category
Coding GPT-5.3 Chat leads
Amazon Nova Pro: 35.1 (#229), GPT-5.3 Chat: 41.4 (#124)
| Benchmark | Amazon Nova Pro | GPT-5.3 Chat |
|---|---|---|
| LMArena Coding | 1270 | 1408 |
| LiveBench Coding | 38.1% | — |
Agentic & Tool Use Not comparable
Amazon Nova Pro: 16.7 (#147), GPT-5.3 Chat: —
| Benchmark | Amazon Nova Pro | GPT-5.3 Chat |
|---|---|---|
| Berkeley Function Calling Leaderboard | 25% | — |
| TheAgentCompany | 1.7% | — |
Reasoning GPT-5.3 Chat leads
Amazon Nova Pro: 20.0 (#243), GPT-5.3 Chat: 28.5 (#102)
| Benchmark | Amazon Nova Pro | GPT-5.3 Chat |
|---|---|---|
| LMArena Hard Prompts | 1246 | 1399 |
| LiveBench Reasoning | 32.6% | — |
| LiveBench Data Analysis | 48.3% | — |
| Epoch Capabilities Index | 123.8 | — |
| LiveBench | 43.5% | — |
Math GPT-5.3 Chat leads
Amazon Nova Pro: 28.5 (#243), GPT-5.3 Chat: 38.2 (#142)
| Benchmark | Amazon Nova Pro | GPT-5.3 Chat |
|---|---|---|
| LMArena Math | 1252 | 1389 |
| Omni-MATH | 24.2% | — |
| LiveBench Math | 38% | — |
Knowledge GPT-5.3 Chat leads
Amazon Nova Pro: 27.4 (#250), GPT-5.3 Chat: 38.8 (#140)
| Benchmark | Amazon Nova Pro | GPT-5.3 Chat |
|---|---|---|
| LMArena Expert | 1211 | 1397 |
| Humanity's Last Exam | 4.4% | — |
| MMLU-Pro | 67.3% | — |
| Confabulations | 30.1% | — |
| Vectara Hallucination Rate | 5.1% | — |
| GPQA (HELM) | 44.6% | — |
| MMLU | 82% | — |
Multimodal Not comparable
Amazon Nova Pro: 25.0 (#126), GPT-5.3 Chat: —
| Benchmark | Amazon Nova Pro | GPT-5.3 Chat |
|---|---|---|
| LMArena Vision | 980 | — |
Multilingual GPT-5.3 Chat leads
Amazon Nova Pro: 39.7 (#223), GPT-5.3 Chat: 50.3 (#124)
| Benchmark | Amazon Nova Pro | GPT-5.3 Chat |
|---|---|---|
| LMArena Non-English | 1234 | 1382 |
| LMArena Chinese | 1244 | 1432 |
| LMArena French | 1271 | 1397 |
| LMArena German | 1243 | 1384 |
| LMArena Japanese | 1200 | 1352 |
| LMArena Korean | 1203 | 1346 |
| LMArena Russian | 1240 | 1400 |
| LMArena Spanish | 1182 | 1371 |
Instruction Following GPT-5.3 Chat leads
Amazon Nova Pro: 64.9 (#226), GPT-5.3 Chat: 72.8 (#129)
| Benchmark | Amazon Nova Pro | GPT-5.3 Chat |
|---|---|---|
| LMArena Instruction Following | 1235 | 1378 |
| LiveBench Instruction Following | 67.1% | — |
| IFEval | 81.5% | — |
Long Context GPT-5.3 Chat leads
Amazon Nova Pro: 38.1 (#205), GPT-5.3 Chat: 42.6 (#120)
| Benchmark | Amazon Nova Pro | GPT-5.3 Chat |
|---|---|---|
| LMArena Longer Query | 1255 | 1396 |
Writing & Preference GPT-5.3 Chat leads
Amazon Nova Pro: 43.9 (#226), GPT-5.3 Chat: 63.1 (#68)
| Benchmark | Amazon Nova Pro | GPT-5.3 Chat |
|---|---|---|
| LMArena Text | 1259 | 1389 |
| LMArena Creative Writing | 1212 | 1355 |
| LMArena Multi-Turn | 1246 | 1412 |
| Short-Story Creative Writing | 60.5% | — |
| EQ-Bench Creative Writing | — | 1690 |
| WildBench | 77.7% | — |
| LiveBench Language | 37% | — |
Frequently asked questions
Is Amazon Nova Pro better than GPT-5.3 Chat?
GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 31.0 on the Noometry Index. Amazon Nova Pro costs 3.4× 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 Pro or GPT-5.3 Chat?
Amazon Nova Pro is cheaper. It lists at $0.80 per million input tokens and $3.20 per million output tokens; GPT-5.3 Chat lists at $1.75 and $14.
Is Amazon Nova Pro or GPT-5.3 Chat better for coding?
GPT-5.3 Chat scores higher on coding benchmarks: 41.4 versus 35.1 in the Noometry coding category.
Which has the bigger context window?
Amazon Nova Pro does, with 300K tokens against 128K.
How many benchmarks do Amazon Nova Pro and GPT-5.3 Chat share?
17 benchmarks have published results for both models. Amazon Nova Pro has 38 scored results on Noometry and GPT-5.3 Chat has 18.