Model comparison
GPT-5.3 Chat vs Nova 2.0 Pro Preview
GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 33.4 on the Noometry Index.
Last verified . 0 shared benchmarks.
Summary
- The widest gap is in reasoning, where GPT-5.3 Chat leads 28.5 to 22.4.
Side by side
| GPT-5.3 Chat | Nova 2.0 Pro Preview | |
|---|---|---|
| Provider | OpenAI | Amazon |
| Noometry Index | 42.8 | 33.4 |
| Released | 2026-03-03 | 2025-12-02 |
| Weights | Proprietary | Proprietary |
| Context window | 128K | — |
| Max output | 16K | — |
| Input $ / M tokens | $1.75 | — |
| Output $ / M tokens | $14 | — |
| Results tracked | 18 | 3 |
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Category by category
Coding Too close to call
GPT-5.3 Chat: 41.4 (#124), Nova 2.0 Pro Preview: 40.8 (#133)
| Benchmark | GPT-5.3 Chat | Nova 2.0 Pro Preview |
|---|---|---|
| SciCode | — | 42.7% |
| LMArena Coding | 1408 | — |
Agentic & Tool Use Not comparable
GPT-5.3 Chat: —, Nova 2.0 Pro Preview: 21.9 (#136)
| Benchmark | GPT-5.3 Chat | Nova 2.0 Pro Preview |
|---|---|---|
| GDP.pdf | — | 2% |
Reasoning GPT-5.3 Chat leads
GPT-5.3 Chat: 28.5 (#102), Nova 2.0 Pro Preview: 22.4 (#194)
| Benchmark | GPT-5.3 Chat | Nova 2.0 Pro Preview |
|---|---|---|
| CritPt | — | 0% |
| LMArena Hard Prompts | 1399 | — |
Math Not comparable
GPT-5.3 Chat: 38.2 (#142), Nova 2.0 Pro Preview: —
| Benchmark | GPT-5.3 Chat | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Math | 1389 | — |
Knowledge Not comparable
GPT-5.3 Chat: 38.8 (#140), Nova 2.0 Pro Preview: —
| Benchmark | GPT-5.3 Chat | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Expert | 1397 | — |
Multilingual Not comparable
GPT-5.3 Chat: 50.3 (#124), Nova 2.0 Pro Preview: —
| Benchmark | GPT-5.3 Chat | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Non-English | 1382 | — |
| LMArena Chinese | 1432 | — |
| LMArena French | 1397 | — |
| LMArena German | 1384 | — |
| LMArena Japanese | 1352 | — |
| LMArena Korean | 1346 | — |
| LMArena Russian | 1400 | — |
| LMArena Spanish | 1371 | — |
Instruction Following Not comparable
GPT-5.3 Chat: 72.8 (#129), Nova 2.0 Pro Preview: —
| Benchmark | GPT-5.3 Chat | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Instruction Following | 1378 | — |
Long Context Not comparable
GPT-5.3 Chat: 42.6 (#120), Nova 2.0 Pro Preview: —
| Benchmark | GPT-5.3 Chat | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Longer Query | 1396 | — |
Writing & Preference Not comparable
GPT-5.3 Chat: 63.1 (#68), Nova 2.0 Pro Preview: —
| Benchmark | GPT-5.3 Chat | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Text | 1389 | — |
| LMArena Creative Writing | 1355 | — |
| EQ-Bench Creative Writing | 1690 | — |
| LMArena Multi-Turn | 1412 | — |
Frequently asked questions
Is GPT-5.3 Chat better than Nova 2.0 Pro Preview?
GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 33.4 on the Noometry Index.
Is GPT-5.3 Chat or Nova 2.0 Pro Preview better for coding?
They score almost the same on coding (41.4 vs 40.8); test both on your own repository before choosing.
How many benchmarks do GPT-5.3 Chat and Nova 2.0 Pro Preview share?
0 benchmarks have published results for both models. GPT-5.3 Chat has 18 scored results on Noometry and Nova 2.0 Pro Preview has 3.