Model comparison
Amazon Nova Experimental Chat 10 09 vs GPT-5.3 Chat
Amazon Nova Experimental Chat 10 09 and GPT-5.3 Chat score almost the same on the Noometry Index (41.9 vs 42.8), so choose on price, context window or the category you care about most.
Last verified . 9 shared benchmarks.
Summary
- They share 9 benchmarks with published results for both. Amazon Nova Experimental Chat 10 09 scores higher in 0 categories and GPT-5.3 Chat in 6 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where GPT-5.3 Chat leads 63.1 to 54.7.
Side by side
| Amazon Nova Experimental Chat 10 09 | GPT-5.3 Chat | |
|---|---|---|
| Provider | Amazon | OpenAI |
| Noometry Index | 41.9 | 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 | 9 | 18 |
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Category by category
Coding GPT-5.3 Chat leads
Amazon Nova Experimental Chat 10 09: 40.2 (#145), GPT-5.3 Chat: 41.4 (#124)
| Benchmark | Amazon Nova Experimental Chat 10 09 | GPT-5.3 Chat |
|---|---|---|
| LMArena Coding | 1370 | 1408 |
Reasoning GPT-5.3 Chat leads
Amazon Nova Experimental Chat 10 09: 27.3 (#120), GPT-5.3 Chat: 28.5 (#102)
| Benchmark | Amazon Nova Experimental Chat 10 09 | GPT-5.3 Chat |
|---|---|---|
| LMArena Hard Prompts | 1356 | 1399 |
Math Not comparable
Amazon Nova Experimental Chat 10 09: —, GPT-5.3 Chat: 38.2 (#142)
| Benchmark | Amazon Nova Experimental Chat 10 09 | GPT-5.3 Chat |
|---|---|---|
| LMArena Math | — | 1389 |
Knowledge Not comparable
Amazon Nova Experimental Chat 10 09: —, GPT-5.3 Chat: 38.8 (#140)
| Benchmark | Amazon Nova Experimental Chat 10 09 | GPT-5.3 Chat |
|---|---|---|
| LMArena Expert | — | 1397 |
Multilingual GPT-5.3 Chat leads
Amazon Nova Experimental Chat 10 09: 47.3 (#150), GPT-5.3 Chat: 50.3 (#124)
| Benchmark | Amazon Nova Experimental Chat 10 09 | GPT-5.3 Chat |
|---|---|---|
| LMArena Non-English | 1340 | 1382 |
| LMArena Chinese | 1341 | 1432 |
| LMArena French | — | 1397 |
| LMArena German | — | 1384 |
| LMArena Japanese | — | 1352 |
| LMArena Korean | — | 1346 |
| LMArena Russian | — | 1400 |
| LMArena Spanish | — | 1371 |
Instruction Following GPT-5.3 Chat leads
Amazon Nova Experimental Chat 10 09: 69.4 (#172), GPT-5.3 Chat: 72.8 (#129)
| Benchmark | Amazon Nova Experimental Chat 10 09 | GPT-5.3 Chat |
|---|---|---|
| LMArena Instruction Following | 1315 | 1378 |
Long Context GPT-5.3 Chat leads
Amazon Nova Experimental Chat 10 09: 40.5 (#152), GPT-5.3 Chat: 42.6 (#120)
| Benchmark | Amazon Nova Experimental Chat 10 09 | GPT-5.3 Chat |
|---|---|---|
| LMArena Longer Query | 1333 | 1396 |
Writing & Preference GPT-5.3 Chat leads
Amazon Nova Experimental Chat 10 09: 54.7 (#149), GPT-5.3 Chat: 63.1 (#68)
| Benchmark | Amazon Nova Experimental Chat 10 09 | GPT-5.3 Chat |
|---|---|---|
| LMArena Text | 1364 | 1389 |
| LMArena Creative Writing | 1307 | 1355 |
| LMArena Multi-Turn | 1355 | 1412 |
| EQ-Bench Creative Writing | — | 1690 |
Frequently asked questions
Is Amazon Nova Experimental Chat 10 09 better than GPT-5.3 Chat?
Amazon Nova Experimental Chat 10 09 and GPT-5.3 Chat score almost the same on the Noometry Index (41.9 vs 42.8), so choose on price, context window or the category you care about most.
Is Amazon Nova Experimental Chat 10 09 or GPT-5.3 Chat better for coding?
GPT-5.3 Chat scores higher on coding benchmarks: 41.4 versus 40.2 in the Noometry coding category.
How many benchmarks do Amazon Nova Experimental Chat 10 09 and GPT-5.3 Chat share?
9 benchmarks have published results for both models. Amazon Nova Experimental Chat 10 09 has 9 scored results on Noometry and GPT-5.3 Chat has 18.