Model comparison
Amazon Nova Pro vs Claude Opus 5.5
Claude Opus 5.5 is the stronger model overall, scoring 68.6 to 31.0 on the Noometry Index. Amazon Nova Pro costs 5.7× less per token, which makes it the better buy when Claude Opus 5.5's lead doesn't matter for your workload.
Last verified . 16 shared benchmarks.
Summary
- They share 16 benchmarks with published results for both. Amazon Nova Pro scores higher in 0 categories and Claude Opus 5.5 in 10 categories; 10 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Opus 5.5 leads 91.8 to 28.5.
- Amazon Nova Pro is cheaper at $0.80 / $3.20 per million input/output tokens, against $4 / $20 for Claude Opus 5.5.
- Claude Opus 5.5 accepts more context: 1M tokens versus 300K.
Side by side
| Amazon Nova Pro | Claude Opus 5.5 | |
|---|---|---|
| Provider | Amazon | Anthropic |
| Noometry Index | 31.0 | 68.6 |
| Released | 2024-12-03 | 2026-09-22 |
| Weights | Proprietary | Proprietary |
| Context window | 300K | 1M |
| Max output | 10K | 128K |
| Input $ / M tokens | $0.80 | $4 |
| Output $ / M tokens | $3.20 | $20 |
| Results tracked | 38 | 44 |
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Category by category
Coding Claude Opus 5.5 leads
Amazon Nova Pro: 35.1 (#229), Claude Opus 5.5: 71.9 (#3)
| Benchmark | Amazon Nova Pro | Claude Opus 5.5 |
|---|---|---|
| LMArena Coding | 1270 | 1547 |
| FrontierCode | — | 54.6% |
| CursorBench | — | 57.8% |
| LMArena WebDev | — | 1813 |
| FrontierSWE | — | 62.3% |
| SciCode | — | 66.9% |
| LiveBench Coding | 38.1% | — |
| MirrorCode | — | 77.4% |
| ALE-Bench | — | 2,147 |
Agentic & Tool Use Claude Opus 5.5 leads
Amazon Nova Pro: 16.7 (#147), Claude Opus 5.5: 45.3 (#15)
| Benchmark | Amazon Nova Pro | Claude Opus 5.5 |
|---|---|---|
| APEX-Agents | — | 73.5% |
| Berkeley Function Calling Leaderboard | 25% | — |
| TheAgentCompany | 1.7% | — |
| GDP.pdf | — | 30.6% |
| Vending-Bench 2 | — | 9,235 |
Reasoning Claude Opus 5.5 leads
Amazon Nova Pro: 20.0 (#243), Claude Opus 5.5: 80.2 (#3)
| Benchmark | Amazon Nova Pro | Claude Opus 5.5 |
|---|---|---|
| LMArena Hard Prompts | 1246 | 1535 |
| Epoch Capabilities Index | 123.8 | 167.33 |
| ARC-AGI-2 | — | 93.3% |
| NYT Connections (extended) | — | 88.5% |
| ARC-AGI-1 | — | 98.5% |
| CritPt | — | 31.7% |
| EBR-Bench | — | 71.4% |
| LiveBench Reasoning | 32.6% | — |
| Mystery Game Puzzles | — | 71% |
| DTBench | — | 98.9% |
| LiveBench Data Analysis | 48.3% | — |
| LMCA | — | 68.2% |
| LiveBench | 43.5% | — |
Math Claude Opus 5.5 leads
Amazon Nova Pro: 28.5 (#243), Claude Opus 5.5: 91.8 (#3)
| Benchmark | Amazon Nova Pro | Claude Opus 5.5 |
|---|---|---|
| LMArena Math | 1252 | 1506 |
| FrontierMath (Tiers 1-3) | — | 91.2% |
| FrontierMath Tier 4 | — | 95% |
| OTIS Mock AIME 2024-2025 | — | 100% |
| ProofBench | — | 100% |
| Omni-MATH | 24.2% | — |
| LiveBench Math | 38% | — |
| FrontierMath Erdős | — | 2.9% |
Knowledge Claude Opus 5.5 leads
Amazon Nova Pro: 27.4 (#250), Claude Opus 5.5: 66.4 (#10)
| Benchmark | Amazon Nova Pro | Claude Opus 5.5 |
|---|---|---|
| LMArena Expert | 1211 | 1547 |
| GPQA Diamond | — | 90.6% |
| Humanity's Last Exam | 4.4% | — |
| SimpleQA Verified | — | 72.2% |
| MMLU-Pro | 67.3% | — |
| Confabulations | 30.1% | — |
| Vectara Hallucination Rate | 5.1% | — |
| GPQA (HELM) | 44.6% | — |
| MMLU | 82% | — |
Multimodal Claude Opus 5.5 leads
Amazon Nova Pro: 25.0 (#126), Claude Opus 5.5: 57.8 (#1)
| Benchmark | Amazon Nova Pro | Claude Opus 5.5 |
|---|---|---|
| LMArena Vision | 980 | 1321 |
| Blueprint-Bench 2 | — | 51.2% |
| Furniture Assembly | — | 83.3% |
Multilingual Claude Opus 5.5 leads
Amazon Nova Pro: 39.7 (#223), Claude Opus 5.5: 59.1 (#2)
| Benchmark | Amazon Nova Pro | Claude Opus 5.5 |
|---|---|---|
| LMArena Non-English | 1234 | 1507 |
| LMArena Chinese | 1244 | 1588 |
| LMArena French | 1271 | 1514 |
| LMArena Russian | 1240 | 1520 |
| LMArena Spanish | 1182 | 1507 |
| LMArena German | 1243 | — |
| LMArena Japanese | 1200 | — |
| LMArena Korean | 1203 | — |
Instruction Following Claude Opus 5.5 leads
Amazon Nova Pro: 64.9 (#226), Claude Opus 5.5: 80.0 (#3)
| Benchmark | Amazon Nova Pro | Claude Opus 5.5 |
|---|---|---|
| LMArena Instruction Following | 1235 | 1537 |
| LiveBench Instruction Following | 67.1% | — |
| IFEval | 81.5% | — |
Long Context Claude Opus 5.5 leads
Amazon Nova Pro: 38.1 (#205), Claude Opus 5.5: 47.1 (#19)
| Benchmark | Amazon Nova Pro | Claude Opus 5.5 |
|---|---|---|
| LMArena Longer Query | 1255 | 1532 |
Writing & Preference Claude Opus 5.5 leads
Amazon Nova Pro: 43.9 (#226), Claude Opus 5.5: 78.2 (#3)
| Benchmark | Amazon Nova Pro | Claude Opus 5.5 |
|---|---|---|
| LMArena Text | 1259 | 1515 |
| LMArena Creative Writing | 1212 | 1533 |
| LMArena Multi-Turn | 1246 | 1499 |
| Short-Story Creative Writing | 60.5% | — |
| EQ-Bench Creative Writing | — | 2050 |
| WildBench | 77.7% | — |
| LiveBench Language | 37% | — |
Frequently asked questions
Is Amazon Nova Pro better than Claude Opus 5.5?
Claude Opus 5.5 is the stronger model overall, scoring 68.6 to 31.0 on the Noometry Index. Amazon Nova Pro costs 5.7× less per token, which makes it the better buy when Claude Opus 5.5's lead doesn't matter for your workload.
Which is cheaper, Amazon Nova Pro or Claude Opus 5.5?
Amazon Nova Pro is cheaper. It lists at $0.80 per million input tokens and $3.20 per million output tokens; Claude Opus 5.5 lists at $4 and $20.
Is Amazon Nova Pro or Claude Opus 5.5 better for coding?
Claude Opus 5.5 scores higher on coding benchmarks: 71.9 versus 35.1 in the Noometry coding category.
Which has the bigger context window?
Claude Opus 5.5 does, with 1M tokens against 300K.
How many benchmarks do Amazon Nova Pro and Claude Opus 5.5 share?
16 benchmarks have published results for both models. Amazon Nova Pro has 38 scored results on Noometry and Claude Opus 5.5 has 44.