Model comparison
GPT-5.3 Codex vs Nova 2.0 Pro Preview
GPT-5.3 Codex is the stronger model overall, scoring 45.8 to 33.4 on the Noometry Index.
Last verified . 0 shared benchmarks.
Summary
- The widest gap is in agentic & tool use, where GPT-5.3 Codex leads 48.0 to 21.9.
Side by side
| GPT-5.3 Codex | Nova 2.0 Pro Preview | |
|---|---|---|
| Provider | OpenAI | Amazon |
| Noometry Index | 45.8 | 33.4 |
| Released | 2026-02-05 | 2025-12-02 |
| Weights | Proprietary | Proprietary |
| Context window | 400K | — |
| Max output | 128K | — |
| Input $ / M tokens | $1.75 | — |
| Output $ / M tokens | $14 | — |
| Results tracked | 8 | 3 |
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Category by category
Coding GPT-5.3 Codex leads
GPT-5.3 Codex: 48.6 (#56), Nova 2.0 Pro Preview: 40.8 (#133)
| Benchmark | GPT-5.3 Codex | Nova 2.0 Pro Preview |
|---|---|---|
| SWE-bench Verified | 74.8% | — |
| LMArena WebDev | 1409 | — |
| SciCode | — | 42.7% |
| WeirdML | 79.3% | — |
| ALE-Bench | 1,655 | — |
Agentic & Tool Use GPT-5.3 Codex leads
GPT-5.3 Codex: 48.0 (#9), Nova 2.0 Pro Preview: 21.9 (#136)
| Benchmark | GPT-5.3 Codex | Nova 2.0 Pro Preview |
|---|---|---|
| Terminal-Bench | 78.4% | — |
| GDP.pdf | — | 2% |
| METR Time Horizons | 74.5% | — |
| Vending-Bench 2 | 5,940 | — |
Reasoning Not comparable
GPT-5.3 Codex: —, Nova 2.0 Pro Preview: 22.4 (#194)
| Benchmark | GPT-5.3 Codex | Nova 2.0 Pro Preview |
|---|---|---|
| CritPt | — | 0% |
| Epoch Capabilities Index | 156.77 | — |
Frequently asked questions
Is GPT-5.3 Codex better than Nova 2.0 Pro Preview?
GPT-5.3 Codex is the stronger model overall, scoring 45.8 to 33.4 on the Noometry Index.
Is GPT-5.3 Codex or Nova 2.0 Pro Preview better for coding?
GPT-5.3 Codex scores higher on coding benchmarks: 48.6 versus 40.8 in the Noometry coding category.
How many benchmarks do GPT-5.3 Codex and Nova 2.0 Pro Preview share?
0 benchmarks have published results for both models. GPT-5.3 Codex has 8 scored results on Noometry and Nova 2.0 Pro Preview has 3.