Model comparison
Amazon Nova Experimental Chat 10 09 vs GPT-5-Codex
Amazon Nova Experimental Chat 10 09 is the stronger model overall, scoring 41.9 to 37.9 on the Noometry Index.
Last verified . 0 shared benchmarks.
Summary
- The widest gap is in reasoning, where GPT-5-Codex leads 30.9 to 27.3.
Side by side
| Amazon Nova Experimental Chat 10 09 | GPT-5-Codex | |
|---|---|---|
| Provider | Amazon | OpenAI |
| Noometry Index | 41.9 | 37.9 |
| Released | — | 2025-09-15 |
| Weights | Proprietary | Proprietary |
| Context window | — | 400K |
| Max output | — | 128K |
| Input $ / M tokens | — | $1.25 |
| Output $ / M tokens | — | $10 |
| Results tracked | 9 | 3 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding GPT-5-Codex leads
Amazon Nova Experimental Chat 10 09: 40.2 (#145), GPT-5-Codex: 42.4 (#103)
| Benchmark | Amazon Nova Experimental Chat 10 09 | GPT-5-Codex |
|---|---|---|
| WeirdML | — | 54.5% |
| LMArena Coding | 1370 | — |
Agentic & Tool Use Not comparable
Amazon Nova Experimental Chat 10 09: —, GPT-5-Codex: 31.0 (#72)
| Benchmark | Amazon Nova Experimental Chat 10 09 | GPT-5-Codex |
|---|---|---|
| Terminal-Bench | — | 44.3% |
Reasoning GPT-5-Codex leads
Amazon Nova Experimental Chat 10 09: 27.3 (#120), GPT-5-Codex: 30.9 (#83)
| Benchmark | Amazon Nova Experimental Chat 10 09 | GPT-5-Codex |
|---|---|---|
| Kagi LLM Benchmark | — | 70.3% |
| LMArena Hard Prompts | 1356 | — |
Multilingual Not comparable
Amazon Nova Experimental Chat 10 09: 47.3 (#150), GPT-5-Codex: —
| Benchmark | Amazon Nova Experimental Chat 10 09 | GPT-5-Codex |
|---|---|---|
| LMArena Non-English | 1340 | — |
| LMArena Chinese | 1341 | — |
Instruction Following Not comparable
Amazon Nova Experimental Chat 10 09: 69.4 (#172), GPT-5-Codex: —
| Benchmark | Amazon Nova Experimental Chat 10 09 | GPT-5-Codex |
|---|---|---|
| LMArena Instruction Following | 1315 | — |
Long Context Not comparable
Amazon Nova Experimental Chat 10 09: 40.5 (#152), GPT-5-Codex: —
| Benchmark | Amazon Nova Experimental Chat 10 09 | GPT-5-Codex |
|---|---|---|
| LMArena Longer Query | 1333 | — |
Writing & Preference Not comparable
Amazon Nova Experimental Chat 10 09: 54.7 (#149), GPT-5-Codex: —
| Benchmark | Amazon Nova Experimental Chat 10 09 | GPT-5-Codex |
|---|---|---|
| LMArena Text | 1364 | — |
| LMArena Creative Writing | 1307 | — |
| LMArena Multi-Turn | 1355 | — |
Frequently asked questions
Is Amazon Nova Experimental Chat 10 09 better than GPT-5-Codex?
Amazon Nova Experimental Chat 10 09 is the stronger model overall, scoring 41.9 to 37.9 on the Noometry Index.
Is Amazon Nova Experimental Chat 10 09 or GPT-5-Codex better for coding?
GPT-5-Codex scores higher on coding benchmarks: 42.4 versus 40.2 in the Noometry coding category.
How many benchmarks do Amazon Nova Experimental Chat 10 09 and GPT-5-Codex share?
0 benchmarks have published results for both models. Amazon Nova Experimental Chat 10 09 has 9 scored results on Noometry and GPT-5-Codex has 3.