Model comparison
Amazon Nova Experimental Chat 10 20 vs GPT-5.3 Chat
Amazon Nova Experimental Chat 10 20 and GPT-5.3 Chat score almost the same on the Noometry Index (42.1 vs 42.8), so choose on price, context window or the category you care about most.
Last verified . 17 shared benchmarks.
Summary
- They share 17 benchmarks with published results for both. Amazon Nova Experimental Chat 10 20 scores higher in 2 categories and GPT-5.3 Chat in 6 categories; one gap is clear of the uncertainty.
- The widest gap is in writing & preference, where GPT-5.3 Chat leads 63.1 to 56.6.
Side by side
| Amazon Nova Experimental Chat 10 20 | GPT-5.3 Chat | |
|---|---|---|
| Provider | Amazon | OpenAI |
| Noometry Index | 42.1 | 42.8 |
| Released | — | 2026-03-03 |
| Weights | Proprietary | Proprietary |
| Context window | — | 128K |
| Max output | — | 16K |
| Input $ / M tokens | — | $1.75 |
| Output $ / M tokens | — | $14 |
| Results tracked | 17 | 18 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Too close to call
Amazon Nova Experimental Chat 10 20: 41.6 (#123), GPT-5.3 Chat: 41.4 (#124)
| Benchmark | Amazon Nova Experimental Chat 10 20 | GPT-5.3 Chat |
|---|---|---|
| LMArena Coding | 1412 | 1408 |
Reasoning Too close to call
Amazon Nova Experimental Chat 10 20: 28.4 (#106), GPT-5.3 Chat: 28.5 (#102)
| Benchmark | Amazon Nova Experimental Chat 10 20 | GPT-5.3 Chat |
|---|---|---|
| LMArena Hard Prompts | 1396 | 1399 |
Math Too close to call
Amazon Nova Experimental Chat 10 20: 39.0 (#119), GPT-5.3 Chat: 38.2 (#142)
| Benchmark | Amazon Nova Experimental Chat 10 20 | GPT-5.3 Chat |
|---|---|---|
| LMArena Math | 1425 | 1389 |
Knowledge Too close to call
Amazon Nova Experimental Chat 10 20: 38.5 (#144), GPT-5.3 Chat: 38.8 (#140)
| Benchmark | Amazon Nova Experimental Chat 10 20 | GPT-5.3 Chat |
|---|---|---|
| LMArena Expert | 1386 | 1397 |
Multilingual Too close to call
Amazon Nova Experimental Chat 10 20: 49.5 (#131), GPT-5.3 Chat: 50.3 (#124)
| Benchmark | Amazon Nova Experimental Chat 10 20 | GPT-5.3 Chat |
|---|---|---|
| LMArena Non-English | 1372 | 1382 |
| LMArena Chinese | 1404 | 1432 |
| LMArena French | 1425 | 1397 |
| LMArena German | 1391 | 1384 |
| LMArena Japanese | 1360 | 1352 |
| LMArena Korean | 1324 | 1346 |
| LMArena Russian | 1371 | 1400 |
| LMArena Spanish | 1382 | 1371 |
Instruction Following Too close to call
Amazon Nova Experimental Chat 10 20: 72.1 (#141), GPT-5.3 Chat: 72.8 (#129)
| Benchmark | Amazon Nova Experimental Chat 10 20 | GPT-5.3 Chat |
|---|---|---|
| LMArena Instruction Following | 1365 | 1378 |
Long Context Too close to call
Amazon Nova Experimental Chat 10 20: 41.7 (#133), GPT-5.3 Chat: 42.6 (#120)
| Benchmark | Amazon Nova Experimental Chat 10 20 | GPT-5.3 Chat |
|---|---|---|
| LMArena Longer Query | 1370 | 1396 |
Writing & Preference GPT-5.3 Chat leads
Amazon Nova Experimental Chat 10 20: 56.6 (#136), GPT-5.3 Chat: 63.1 (#68)
| Benchmark | Amazon Nova Experimental Chat 10 20 | GPT-5.3 Chat |
|---|---|---|
| LMArena Text | 1394 | 1389 |
| LMArena Creative Writing | 1318 | 1355 |
| LMArena Multi-Turn | 1364 | 1412 |
| EQ-Bench Creative Writing | — | 1690 |
Frequently asked questions
Is Amazon Nova Experimental Chat 10 20 better than GPT-5.3 Chat?
Amazon Nova Experimental Chat 10 20 and GPT-5.3 Chat score almost the same on the Noometry Index (42.1 vs 42.8), so choose on price, context window or the category you care about most.
Is Amazon Nova Experimental Chat 10 20 or GPT-5.3 Chat better for coding?
They score almost the same on coding (41.6 vs 41.4); test both on your own repository before choosing.
How many benchmarks do Amazon Nova Experimental Chat 10 20 and GPT-5.3 Chat share?
17 benchmarks have published results for both models. Amazon Nova Experimental Chat 10 20 has 17 scored results on Noometry and GPT-5.3 Chat has 18.