Model comparison
Amazon Nova Experimental Chat 12 10 vs GPT-5.2 Codex
Amazon Nova Experimental Chat 12 10 and GPT-5.2 Codex score almost the same on the Noometry Index (42.9 vs 42.6), so choose on price, context window or the category you care about most.
Last verified . 0 shared benchmarks.
Summary
- The widest gap is in coding, where GPT-5.2 Codex leads 45.5 to 42.2.
Side by side
| Amazon Nova Experimental Chat 12 10 | GPT-5.2 Codex | |
|---|---|---|
| Provider | Amazon | OpenAI |
| Noometry Index | 42.9 | 42.6 |
| Released | — | 2025-12-18 |
| Weights | Proprietary | Proprietary |
| Context window | — | 400K |
| Max output | — | 128K |
| Input $ / M tokens | — | $1.75 |
| Output $ / M tokens | — | $14 |
| Results tracked | 12 | 5 |
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Category by category
Coding GPT-5.2 Codex leads
Amazon Nova Experimental Chat 12 10: 42.2 (#110), GPT-5.2 Codex: 45.5 (#71)
| Benchmark | Amazon Nova Experimental Chat 12 10 | GPT-5.2 Codex |
|---|---|---|
| SWE-bench Verified (bash only) | — | 72.8% |
| LMArena WebDev | — | 1339 |
| SWE-bench Multilingual | — | 66.3% |
| LMArena Coding | 1430 | — |
| ALE-Bench | — | 1,300 |
Agentic & Tool Use Not comparable
Amazon Nova Experimental Chat 12 10: —, GPT-5.2 Codex: 41.0 (#22)
| Benchmark | Amazon Nova Experimental Chat 12 10 | GPT-5.2 Codex |
|---|---|---|
| Terminal-Bench | — | 66.5% |
Reasoning Not comparable
Amazon Nova Experimental Chat 12 10: 29.3 (#94), GPT-5.2 Codex: —
| Benchmark | Amazon Nova Experimental Chat 12 10 | GPT-5.2 Codex |
|---|---|---|
| LMArena Hard Prompts | 1427 | — |
Math Not comparable
Amazon Nova Experimental Chat 12 10: 38.9 (#124), GPT-5.2 Codex: —
| Benchmark | Amazon Nova Experimental Chat 12 10 | GPT-5.2 Codex |
|---|---|---|
| LMArena Math | 1419 | — |
Knowledge Not comparable
Amazon Nova Experimental Chat 12 10: 39.2 (#136), GPT-5.2 Codex: —
| Benchmark | Amazon Nova Experimental Chat 12 10 | GPT-5.2 Codex |
|---|---|---|
| LMArena Expert | 1408 | — |
Multilingual Not comparable
Amazon Nova Experimental Chat 12 10: 51.4 (#108), GPT-5.2 Codex: —
| Benchmark | Amazon Nova Experimental Chat 12 10 | GPT-5.2 Codex |
|---|---|---|
| LMArena Non-English | 1398 | — |
| LMArena Chinese | 1440 | — |
| LMArena Russian | 1395 | — |
Instruction Following Not comparable
Amazon Nova Experimental Chat 12 10: 73.2 (#123), GPT-5.2 Codex: —
| Benchmark | Amazon Nova Experimental Chat 12 10 | GPT-5.2 Codex |
|---|---|---|
| LMArena Instruction Following | 1387 | — |
Long Context Not comparable
Amazon Nova Experimental Chat 12 10: 42.4 (#125), GPT-5.2 Codex: —
| Benchmark | Amazon Nova Experimental Chat 12 10 | GPT-5.2 Codex |
|---|---|---|
| LMArena Longer Query | 1391 | — |
Writing & Preference Not comparable
Amazon Nova Experimental Chat 12 10: 59.5 (#110), GPT-5.2 Codex: —
| Benchmark | Amazon Nova Experimental Chat 12 10 | GPT-5.2 Codex |
|---|---|---|
| LMArena Text | 1420 | — |
| LMArena Creative Writing | 1350 | — |
| LMArena Multi-Turn | 1409 | — |
Frequently asked questions
Is Amazon Nova Experimental Chat 12 10 better than GPT-5.2 Codex?
Amazon Nova Experimental Chat 12 10 and GPT-5.2 Codex score almost the same on the Noometry Index (42.9 vs 42.6), so choose on price, context window or the category you care about most.
Is Amazon Nova Experimental Chat 12 10 or GPT-5.2 Codex better for coding?
GPT-5.2 Codex scores higher on coding benchmarks: 45.5 versus 42.2 in the Noometry coding category.
How many benchmarks do Amazon Nova Experimental Chat 12 10 and GPT-5.2 Codex share?
0 benchmarks have published results for both models. Amazon Nova Experimental Chat 12 10 has 12 scored results on Noometry and GPT-5.2 Codex has 5.