Model comparison
Amazon Nova Pro vs GPT-5.5 Pro
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 30.5 on the Noometry Index. Amazon Nova Pro costs 48× less per token, which makes it the better buy when GPT-5.5 Pro'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 Pro scores higher in 0 categories and GPT-5.5 Pro in 3 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-5.5 Pro leads 83.8 to 26.4.
- Amazon Nova Pro is cheaper at $0.80 / $3.20 per million input/output tokens, against $30 / $180 for GPT-5.5 Pro.
- GPT-5.5 Pro accepts more context: 1.05M tokens versus 300K.
Side by side
| Amazon Nova Pro | GPT-5.5 Pro | |
|---|---|---|
| Provider | Amazon | OpenAI |
| Noometry Index | 30.5 | 64.3 |
| Released | 2024-12-03 | 2026-04-23 |
| Weights | Proprietary | Proprietary |
| Context window | 300K | 1.05M |
| Max output | 10K | 128K |
| Input $ / M tokens | $0.80 | $30 |
| Output $ / M tokens | $3.20 | $180 |
| Results tracked | 38 | 14 |
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Category by category
Coding Not comparable
Amazon Nova Pro: 34.6 (#224), GPT-5.5 Pro: —
| Benchmark | Amazon Nova Pro | GPT-5.5 Pro |
|---|---|---|
| LiveBench Coding | 38.1% | — |
| LMArena Coding | 1270 | — |
Agentic & Tool Use Not comparable
Amazon Nova Pro: 16.6 (#139), GPT-5.5 Pro: —
| Benchmark | Amazon Nova Pro | GPT-5.5 Pro |
|---|---|---|
| Berkeley Function Calling Leaderboard | 25% | — |
| TheAgentCompany | 1.7% | — |
Reasoning GPT-5.5 Pro leads
Amazon Nova Pro: 19.2 (#240), GPT-5.5 Pro: 73.6 (#7)
| Benchmark | Amazon Nova Pro | GPT-5.5 Pro |
|---|---|---|
| Epoch Capabilities Index | 123.75 | 162.45 |
| ARC-AGI-2 | — | 84.6% |
| SimpleBench | — | 76.9% |
| ARC-AGI-1 | — | 96.5% |
| CritPt | — | 30.6% |
| Chess Puzzles | — | 64% |
| LiveBench Reasoning | 32.6% | — |
| LMArena Hard Prompts | 1246 | — |
| DTBench | — | 96% |
| LiveBench Data Analysis | 48.3% | — |
| LMCA | — | 53.9% |
| LiveBench | 43.5% | — |
Math GPT-5.5 Pro leads
Amazon Nova Pro: 26.4 (#240), GPT-5.5 Pro: 83.8 (#8)
| Benchmark | Amazon Nova Pro | GPT-5.5 Pro |
|---|---|---|
| FrontierMath (Tiers 1-3) | — | 87.7% |
| FrontierMath Tier 4 | — | 78% |
| OTIS Mock AIME 2024-2025 | — | 100% |
| Omni-MATH | 24.2% | — |
| LiveBench Math | 38% | — |
| LMArena Math | 1252 | — |
| FrontierMath (Feb 2025 set) | — | 52.4% |
| FrontierMath Tier 4 (v1) | — | 39.6% |
Knowledge GPT-5.5 Pro leads
Amazon Nova Pro: 27.1 (#246), GPT-5.5 Pro: 64.2 (#17)
| Benchmark | Amazon Nova Pro | GPT-5.5 Pro |
|---|---|---|
| GPQA Diamond | — | 93.9% |
| Humanity's Last Exam | 4.4% | — |
| MMLU-Pro | 67.3% | — |
| Confabulations | 30.1% | — |
| Vectara Hallucination Rate | 5.1% | — |
| GPQA (HELM) | 44.6% | — |
| LMArena Expert | 1211 | — |
| MMLU | 82% | — |
Multimodal Not comparable
Amazon Nova Pro: 24.5 (#121), GPT-5.5 Pro: —
| Benchmark | Amazon Nova Pro | GPT-5.5 Pro |
|---|---|---|
| LMArena Vision | 980 | — |
Multilingual Not comparable
Amazon Nova Pro: 39.9 (#218), GPT-5.5 Pro: —
| Benchmark | Amazon Nova Pro | GPT-5.5 Pro |
|---|---|---|
| LMArena Non-English | 1234 | — |
| LMArena Chinese | 1244 | — |
| LMArena French | 1270 | — |
| LMArena German | 1243 | — |
| LMArena Japanese | 1200 | — |
| LMArena Korean | 1203 | — |
| LMArena Russian | 1240 | — |
| LMArena Spanish | 1182 | — |
Instruction Following Not comparable
Amazon Nova Pro: 65.1 (#221), GPT-5.5 Pro: —
| Benchmark | Amazon Nova Pro | GPT-5.5 Pro |
|---|---|---|
| LiveBench Instruction Following | 67.1% | — |
| IFEval | 81.5% | — |
| LMArena Instruction Following | 1235 | — |
Long Context Not comparable
Amazon Nova Pro: 38.1 (#199), GPT-5.5 Pro: —
| Benchmark | Amazon Nova Pro | GPT-5.5 Pro |
|---|---|---|
| LMArena Longer Query | 1255 | — |
Writing & Preference Not comparable
Amazon Nova Pro: 44.1 (#221), GPT-5.5 Pro: —
| Benchmark | Amazon Nova Pro | GPT-5.5 Pro |
|---|---|---|
| LMArena Text | 1259 | — |
| LMArena Creative Writing | 1212 | — |
| Short-Story Creative Writing | 60.5% | — |
| WildBench | 77.7% | — |
| LMArena Multi-Turn | 1245 | — |
| LiveBench Language | 37% | — |
Frequently asked questions
Is Amazon Nova Pro better than GPT-5.5 Pro?
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 30.5 on the Noometry Index. Amazon Nova Pro costs 48× less per token, which makes it the better buy when GPT-5.5 Pro's lead doesn't matter for your workload.
Which is cheaper, Amazon Nova Pro or GPT-5.5 Pro?
Amazon Nova Pro is cheaper. It lists at $0.80 per million input tokens and $3.20 per million output tokens; GPT-5.5 Pro lists at $30 and $180.
Which has the bigger context window?
GPT-5.5 Pro does, with 1.05M tokens against 300K.
How many benchmarks do Amazon Nova Pro and GPT-5.5 Pro share?
1 benchmark has published results for both models. Amazon Nova Pro has 38 scored results on Noometry and GPT-5.5 Pro has 14.