Model comparison
Amazon Nova Pro vs GPT-5.1
GPT-5.1 is the stronger model overall, scoring 49.0 to 31.0 on the Noometry Index. Amazon Nova Pro costs 2.5× less per token, which makes it the better buy when GPT-5.1's lead doesn't matter for your workload.
Last verified . 33 shared benchmarks.
Summary
- They share 33 benchmarks with published results for both. Amazon Nova Pro scores higher in 0 categories and GPT-5.1 in 10 categories; 10 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-5.1 leads 52.2 to 28.5.
- The biggest single-benchmark swing is LiveBench Reasoning: 32.6% for Amazon Nova Pro and 95.8% for GPT-5.1.
- Amazon Nova Pro is cheaper at $0.80 / $3.20 per million input/output tokens, against $1.25 / $10 for GPT-5.1.
- GPT-5.1 accepts more context: 400K tokens versus 300K.
Side by side
| Amazon Nova Pro | GPT-5.1 | |
|---|---|---|
| Provider | Amazon | OpenAI |
| Noometry Index | 31.0 | 49.0 |
| Released | 2024-12-03 | 2025-11-13 |
| Weights | Proprietary | Proprietary |
| Context window | 300K | 400K |
| Max output | 10K | 128K |
| Input $ / M tokens | $0.80 | $1.25 |
| Output $ / M tokens | $3.20 | $10 |
| Results tracked | 38 | 63 |
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Category by category
Coding GPT-5.1 leads
Amazon Nova Pro: 35.1 (#229), GPT-5.1: 46.4 (#66)
| Benchmark | Amazon Nova Pro | GPT-5.1 |
|---|---|---|
| LiveBench Coding | 38.1% | 72.5% |
| LMArena Coding | 1270 | 1454 |
| SWE-bench Verified | — | 68% |
| SWE-bench Verified (bash only) | — | 66% |
| LMArena WebDev | — | 1395 |
| SciCode | — | 43.3% |
| GSO | — | 13.7% |
| WeirdML | — | 60.8% |
| ALE-Bench | — | 1,192 |
Agentic & Tool Use GPT-5.1 leads
Amazon Nova Pro: 16.7 (#147), GPT-5.1: 32.7 (#60)
| Benchmark | Amazon Nova Pro | GPT-5.1 |
|---|---|---|
| Terminal-Bench | — | 47.6% |
| Berkeley Function Calling Leaderboard | 25% | — |
| TheAgentCompany | 1.7% | — |
| DeepResearch Bench | — | 42.8% |
| LMArena Search | — | 1199 |
| Vending-Bench 2 | — | 1,473 |
Reasoning GPT-5.1 leads
Amazon Nova Pro: 20.0 (#243), GPT-5.1: 39.8 (#58)
| Benchmark | Amazon Nova Pro | GPT-5.1 |
|---|---|---|
| LiveBench Reasoning | 32.6% | 95.8% |
| LMArena Hard Prompts | 1246 | 1457 |
| LiveBench Data Analysis | 48.3% | 72.1% |
| Epoch Capabilities Index | 123.8 | 149.64 |
| LiveBench | 43.5% | 78.8% |
| ARC-AGI-2 | — | 17.6% |
| SimpleBench | — | 53.2% |
| ARC-AGI-1 | — | 72.8% |
| CritPt | — | 4.9% |
| Chess Puzzles | — | 32% |
| EnigmaEval | — | 11.2% |
| Mystery Game Puzzles | — | 19% |
| DTBench | — | 90.1% |
| LMCA | — | 43.9% |
| ForecastBench | — | 58.1 |
Math GPT-5.1 leads
Amazon Nova Pro: 28.5 (#243), GPT-5.1: 52.2 (#51)
| Benchmark | Amazon Nova Pro | GPT-5.1 |
|---|---|---|
| Omni-MATH | 24.2% | 46.4% |
| LiveBench Math | 38% | 94.5% |
| LMArena Math | 1252 | 1447 |
| OTIS Mock AIME 2024-2025 | — | 88.6% |
| FrontierMath (Feb 2025 set) | — | 31% |
| FrontierMath Tier 4 (v1) | — | 12.5% |
Knowledge GPT-5.1 leads
Amazon Nova Pro: 27.4 (#250), GPT-5.1: 50.6 (#71)
| Benchmark | Amazon Nova Pro | GPT-5.1 |
|---|---|---|
| Humanity's Last Exam | 4.4% | 23.7% |
| MMLU-Pro | 67.3% | 57.9% |
| Vectara Hallucination Rate | 5.1% | 10.9% |
| GPQA (HELM) | 44.6% | 44.2% |
| LMArena Expert | 1211 | 1470 |
| GPQA Diamond | — | 87.6% |
| SimpleQA Verified | — | 48% |
| Confabulations | 30.1% | — |
| MMLU | 82% | — |
Multimodal GPT-5.1 leads
Amazon Nova Pro: 25.0 (#126), GPT-5.1: 44.8 (#19)
| Benchmark | Amazon Nova Pro | GPT-5.1 |
|---|---|---|
| LMArena Vision | 980 | 1250 |
| VPCT | — | 58.7% |
| LMArena Document | — | 1403 |
Multilingual GPT-5.1 leads
Amazon Nova Pro: 39.7 (#223), GPT-5.1: 53.8 (#56)
| Benchmark | Amazon Nova Pro | GPT-5.1 |
|---|---|---|
| LMArena Non-English | 1234 | 1431 |
| LMArena Chinese | 1244 | 1495 |
| LMArena French | 1271 | 1450 |
| LMArena German | 1243 | 1438 |
| LMArena Japanese | 1200 | 1453 |
| LMArena Korean | 1203 | 1401 |
| LMArena Russian | 1240 | 1435 |
| LMArena Spanish | 1182 | 1433 |
Instruction Following GPT-5.1 leads
Amazon Nova Pro: 64.9 (#226), GPT-5.1: 83.9 (#1)
| Benchmark | Amazon Nova Pro | GPT-5.1 |
|---|---|---|
| LiveBench Instruction Following | 67.1% | 93.3% |
| IFEval | 81.5% | 93.5% |
| LMArena Instruction Following | 1235 | 1443 |
Long Context GPT-5.1 leads
Amazon Nova Pro: 38.1 (#205), GPT-5.1: 47.6 (#14)
| Benchmark | Amazon Nova Pro | GPT-5.1 |
|---|---|---|
| LMArena Longer Query | 1255 | 1447 |
| CL-bench | — | 23.7% |
| CL-bench Life | — | 17.3% |
Writing & Preference GPT-5.1 leads
Amazon Nova Pro: 43.9 (#226), GPT-5.1: 64.5 (#55)
| Benchmark | Amazon Nova Pro | GPT-5.1 |
|---|---|---|
| LMArena Text | 1259 | 1443 |
| LMArena Creative Writing | 1212 | 1427 |
| WildBench | 77.7% | 86.3% |
| LMArena Multi-Turn | 1246 | 1450 |
| LiveBench Language | 37% | 80.2% |
| Short-Story Creative Writing | 60.5% | — |
Frequently asked questions
Is Amazon Nova Pro better than GPT-5.1?
GPT-5.1 is the stronger model overall, scoring 49.0 to 31.0 on the Noometry Index. Amazon Nova Pro costs 2.5× less per token, which makes it the better buy when GPT-5.1's lead doesn't matter for your workload.
Which is cheaper, Amazon Nova Pro or GPT-5.1?
Amazon Nova Pro is cheaper. It lists at $0.80 per million input tokens and $3.20 per million output tokens; GPT-5.1 lists at $1.25 and $10.
Is Amazon Nova Pro or GPT-5.1 better for coding?
GPT-5.1 scores higher on coding benchmarks: 46.4 versus 35.1 in the Noometry coding category.
Which has the bigger context window?
GPT-5.1 does, with 400K tokens against 300K.
How many benchmarks do Amazon Nova Pro and GPT-5.1 share?
33 benchmarks have published results for both models. Amazon Nova Pro has 38 scored results on Noometry and GPT-5.1 has 63.