Model comparison
Amazon Nova Lite vs GPT-5.3 Codex
GPT-5.3 Codex is the stronger model overall, scoring 45.8 to 31.9 on the Noometry Index. Amazon Nova Lite costs 46× less per token, which makes it the better buy when GPT-5.3 Codex's lead doesn't matter for your workload.
Last verified . 1 shared benchmarks.
Summary
- They share 1 benchmark with published results for both. Amazon Nova Lite scores higher in 0 categories and GPT-5.3 Codex in 1 category; one gap is clear of the uncertainty.
- The widest gap is in coding, where GPT-5.3 Codex leads 48.6 to 32.5.
- Amazon Nova Lite is cheaper at $0.06 / $0.24 per million input/output tokens, against $1.75 / $14 for GPT-5.3 Codex.
- GPT-5.3 Codex accepts more context: 400K tokens versus 300K.
Side by side
| Amazon Nova Lite | GPT-5.3 Codex | |
|---|---|---|
| Provider | Amazon | OpenAI |
| Noometry Index | 31.9 | 45.8 |
| Released | 2024-12-03 | 2026-02-05 |
| Weights | Proprietary | Proprietary |
| Context window | 300K | 400K |
| Max output | 10K | 128K |
| Input $ / M tokens | $0.06 | $1.75 |
| Output $ / M tokens | $0.24 | $14 |
| Results tracked | 34 | 8 |
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Category by category
Coding GPT-5.3 Codex leads
Amazon Nova Lite: 32.5 (#270), GPT-5.3 Codex: 48.6 (#56)
| Benchmark | Amazon Nova Lite | GPT-5.3 Codex |
|---|---|---|
| ALE-Bench | 236.25 | 1,655 |
| SWE-bench Verified | — | 74.8% |
| LMArena WebDev | — | 1409 |
| WeirdML | — | 79.3% |
| LiveBench Coding | 27.5% | — |
| LMArena Coding | 1239 | — |
Agentic & Tool Use Not comparable
Amazon Nova Lite: —, GPT-5.3 Codex: 48.0 (#9)
| Benchmark | Amazon Nova Lite | GPT-5.3 Codex |
|---|---|---|
| Terminal-Bench | — | 78.4% |
| METR Time Horizons | — | 74.5% |
| Vending-Bench 2 | — | 5,940 |
Reasoning Not comparable
Amazon Nova Lite: 19.3 (#260), GPT-5.3 Codex: —
| Benchmark | Amazon Nova Lite | GPT-5.3 Codex |
|---|---|---|
| LiveBench Reasoning | 36.7% | — |
| LMArena Hard Prompts | 1220 | — |
| LiveBench Data Analysis | 37.2% | — |
| Epoch Capabilities Index | — | 156.77 |
| LiveBench | 36.4% | — |
Math Not comparable
Amazon Nova Lite: 27.8 (#247), GPT-5.3 Codex: —
| Benchmark | Amazon Nova Lite | GPT-5.3 Codex |
|---|---|---|
| Omni-MATH | 23.3% | — |
| LiveBench Math | 36.7% | — |
| LMArena Math | 1227 | — |
Knowledge Not comparable
Amazon Nova Lite: 26.3 (#259), GPT-5.3 Codex: —
| Benchmark | Amazon Nova Lite | GPT-5.3 Codex |
|---|---|---|
| Humanity's Last Exam | 3.6% | — |
| MMLU-Pro | 60% | — |
| Vectara Hallucination Rate | 6.1% | — |
| GPQA (HELM) | 39.7% | — |
| LMArena Expert | 1201 | — |
| MMLU | 77% | — |
Multimodal Not comparable
Amazon Nova Lite: 25.5 (#123), GPT-5.3 Codex: —
| Benchmark | Amazon Nova Lite | GPT-5.3 Codex |
|---|---|---|
| LMArena Vision | 990 | — |
Multilingual Not comparable
Amazon Nova Lite: 38.0 (#232), GPT-5.3 Codex: —
| Benchmark | Amazon Nova Lite | GPT-5.3 Codex |
|---|---|---|
| LMArena Non-English | 1208 | — |
| LMArena Chinese | 1225 | — |
| LMArena French | 1237 | — |
| LMArena German | 1229 | — |
| LMArena Japanese | 1153 | — |
| LMArena Korean | 1153 | — |
| LMArena Russian | 1216 | — |
| LMArena Spanish | 1226 | — |
Instruction Following Not comparable
Amazon Nova Lite: 59.3 (#255), GPT-5.3 Codex: —
| Benchmark | Amazon Nova Lite | GPT-5.3 Codex |
|---|---|---|
| LiveBench Instruction Following | 54.1% | — |
| IFEval | 77.6% | — |
| LMArena Instruction Following | 1205 | — |
Long Context Not comparable
Amazon Nova Lite: 37.4 (#217), GPT-5.3 Codex: —
| Benchmark | Amazon Nova Lite | GPT-5.3 Codex |
|---|---|---|
| LMArena Longer Query | 1234 | — |
Writing & Preference Not comparable
Amazon Nova Lite: 42.1 (#237), GPT-5.3 Codex: —
| Benchmark | Amazon Nova Lite | GPT-5.3 Codex |
|---|---|---|
| LMArena Text | 1229 | — |
| LMArena Creative Writing | 1197 | — |
| WildBench | 75% | — |
| LMArena Multi-Turn | 1199 | — |
| LiveBench Language | 25.9% | — |
Frequently asked questions
Is Amazon Nova Lite better than GPT-5.3 Codex?
GPT-5.3 Codex is the stronger model overall, scoring 45.8 to 31.9 on the Noometry Index. Amazon Nova Lite costs 46× less per token, which makes it the better buy when GPT-5.3 Codex's lead doesn't matter for your workload.
Which is cheaper, Amazon Nova Lite or GPT-5.3 Codex?
Amazon Nova Lite is cheaper. It lists at $0.06 per million input tokens and $0.24 per million output tokens; GPT-5.3 Codex lists at $1.75 and $14.
Is Amazon Nova Lite or GPT-5.3 Codex better for coding?
GPT-5.3 Codex scores higher on coding benchmarks: 48.6 versus 32.5 in the Noometry coding category.
Which has the bigger context window?
GPT-5.3 Codex does, with 400K tokens against 300K.
How many benchmarks do Amazon Nova Lite and GPT-5.3 Codex share?
1 benchmark has published results for both models. Amazon Nova Lite has 34 scored results on Noometry and GPT-5.3 Codex has 8.