Model comparison
Amazon Nova Experimental Chat 10 20 vs GPT-5 Nano
Amazon Nova Experimental Chat 10 20 is the stronger model overall, scoring 42.1 to 33.5 on the Noometry Index.
Last verified . 16 shared benchmarks.
Summary
- They share 16 benchmarks with published results for both. Amazon Nova Experimental Chat 10 20 scores higher in 7 categories and GPT-5 Nano in 1 category; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Amazon Nova Experimental Chat 10 20 leads 56.6 to 39.1.
Side by side
| Amazon Nova Experimental Chat 10 20 | GPT-5 Nano | |
|---|---|---|
| Provider | Amazon | OpenAI |
| Noometry Index | 42.1 | 33.5 |
| Released | — | 2025-08-07 |
| Weights | Proprietary | Proprietary |
| Context window | — | 400K |
| Max output | — | 128K |
| Input $ / M tokens | — | $0.05 |
| Output $ / M tokens | — | $0.40 |
| Results tracked | 17 | 49 |
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Category by category
Coding Amazon Nova Experimental Chat 10 20 leads
Amazon Nova Experimental Chat 10 20: 41.6 (#123), GPT-5 Nano: 33.6 (#254)
| Benchmark | Amazon Nova Experimental Chat 10 20 | GPT-5 Nano |
|---|---|---|
| LMArena Coding | 1412 | 1351 |
| SWE-bench Verified (bash only) | — | 34.8% |
| WeirdML | — | 38.1% |
| ALE-Bench | — | 718.67 |
Agentic & Tool Use Not comparable
Amazon Nova Experimental Chat 10 20: —, GPT-5 Nano: 25.8 (#106)
| Benchmark | Amazon Nova Experimental Chat 10 20 | GPT-5 Nano |
|---|---|---|
| Terminal-Bench | — | 21.8% |
| Berkeley Function Calling Leaderboard | — | 51.5% |
Reasoning Amazon Nova Experimental Chat 10 20 leads
Amazon Nova Experimental Chat 10 20: 28.4 (#106), GPT-5 Nano: 16.3 (#306)
| Benchmark | Amazon Nova Experimental Chat 10 20 | GPT-5 Nano |
|---|---|---|
| LMArena Hard Prompts | 1396 | 1328 |
| ARC-AGI-2 | — | 2.6% |
| Kagi LLM Benchmark | — | 62.2% |
| ARC-AGI-1 | — | 20.7% |
| Chess Puzzles | — | 27% |
| Mystery Game Puzzles | — | 9% |
| DTBench | — | 62.7% |
| LMCA | — | 7.9% |
| Epoch Capabilities Index | — | 139.38 |
| ForecastBench | — | 59.1 |
Math Amazon Nova Experimental Chat 10 20 leads
Amazon Nova Experimental Chat 10 20: 39.0 (#119), GPT-5 Nano: 29.4 (#241)
| Benchmark | Amazon Nova Experimental Chat 10 20 | GPT-5 Nano |
|---|---|---|
| LMArena Math | 1425 | 1317 |
| FrontierMath (Tiers 1-3) | — | 20% |
| FrontierMath Tier 4 | — | 2.4% |
| OTIS Mock AIME 2024-2025 | — | 81.1% |
| ProofBench | — | 12% |
| Omni-MATH | — | 54.6% |
| MATH Level 5 | — | 95.2% |
| FrontierMath (Feb 2025 set) | — | 8.3% |
| FrontierMath Tier 4 (v1) | — | 2.1% |
Knowledge Amazon Nova Experimental Chat 10 20 leads
Amazon Nova Experimental Chat 10 20: 38.5 (#144), GPT-5 Nano: 35.9 (#178)
| Benchmark | Amazon Nova Experimental Chat 10 20 | GPT-5 Nano |
|---|---|---|
| LMArena Expert | 1386 | 1321 |
| GPQA Diamond | — | 69.4% |
| SimpleQA Verified | — | 11.7% |
| MMLU-Pro | — | 77.8% |
| Vectara Hallucination Rate | — | 10.5% |
| GPQA (HELM) | — | 67.9% |
Multimodal Not comparable
Amazon Nova Experimental Chat 10 20: —, GPT-5 Nano: 31.3 (#108)
| Benchmark | Amazon Nova Experimental Chat 10 20 | GPT-5 Nano |
|---|---|---|
| LMArena Vision | — | 1159 |
| VPCT | — | 37.2% |
Multilingual Amazon Nova Experimental Chat 10 20 leads
Amazon Nova Experimental Chat 10 20: 49.5 (#131), GPT-5 Nano: 45.3 (#172)
| Benchmark | Amazon Nova Experimental Chat 10 20 | GPT-5 Nano |
|---|---|---|
| LMArena Non-English | 1372 | 1313 |
| LMArena Chinese | 1404 | 1356 |
| LMArena German | 1391 | 1327 |
| LMArena Japanese | 1360 | 1226 |
| LMArena Korean | 1324 | 1269 |
| LMArena Russian | 1371 | 1296 |
| LMArena Spanish | 1382 | 1360 |
| LMArena French | 1425 | — |
Instruction Following GPT-5 Nano leads
Amazon Nova Experimental Chat 10 20: 72.1 (#141), GPT-5 Nano: 75.0 (#79)
| Benchmark | Amazon Nova Experimental Chat 10 20 | GPT-5 Nano |
|---|---|---|
| LMArena Instruction Following | 1365 | 1306 |
| IFEval | — | 93.2% |
Long Context Amazon Nova Experimental Chat 10 20 leads
Amazon Nova Experimental Chat 10 20: 41.7 (#133), GPT-5 Nano: 31.3 (#281)
| Benchmark | Amazon Nova Experimental Chat 10 20 | GPT-5 Nano |
|---|---|---|
| LMArena Longer Query | 1370 | 1312 |
| Fiction.LiveBench | — | 44.4% |
Writing & Preference Amazon Nova Experimental Chat 10 20 leads
Amazon Nova Experimental Chat 10 20: 56.6 (#136), GPT-5 Nano: 39.1 (#249)
| Benchmark | Amazon Nova Experimental Chat 10 20 | GPT-5 Nano |
|---|---|---|
| LMArena Text | 1394 | 1320 |
| LMArena Creative Writing | 1318 | 1249 |
| LMArena Multi-Turn | 1364 | 1311 |
| EQ-Bench Creative Writing | — | 705 |
| WildBench | — | 80.6% |
Frequently asked questions
Is Amazon Nova Experimental Chat 10 20 better than GPT-5 Nano?
Amazon Nova Experimental Chat 10 20 is the stronger model overall, scoring 42.1 to 33.5 on the Noometry Index.
Is Amazon Nova Experimental Chat 10 20 or GPT-5 Nano better for coding?
Amazon Nova Experimental Chat 10 20 scores higher on coding benchmarks: 41.6 versus 33.6 in the Noometry coding category.
How many benchmarks do Amazon Nova Experimental Chat 10 20 and GPT-5 Nano share?
16 benchmarks have published results for both models. Amazon Nova Experimental Chat 10 20 has 17 scored results on Noometry and GPT-5 Nano has 49.