Model comparison
Claude Sonnet 5.5 vs Nova 2.0 Pro Preview
Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 33.4 on the Noometry Index.
Last verified . 2 shared benchmarks.
Summary
- They share 2 benchmarks with published results for both. Claude Sonnet 5.5 scores higher in 3 categories and Nova 2.0 Pro Preview in 0 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Claude Sonnet 5.5 leads 54.0 to 22.4.
- The biggest single-benchmark swing is CritPt: 31.4% for Claude Sonnet 5.5 and 0% for Nova 2.0 Pro Preview.
Side by side
| Claude Sonnet 5.5 | Nova 2.0 Pro Preview | |
|---|---|---|
| Provider | Anthropic | Amazon |
| Noometry Index | 61.9 | 33.4 |
| Released | 2026-09-28 | 2025-12-02 |
| Weights | Proprietary | Proprietary |
| Context window | 1M | — |
| Max output | 128K | — |
| Input $ / M tokens | $2 | — |
| Output $ / M tokens | $10 | — |
| Results tracked | 32 | 3 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 67.3 (#6), Nova 2.0 Pro Preview: 40.8 (#133)
| Benchmark | Claude Sonnet 5.5 | Nova 2.0 Pro Preview |
|---|---|---|
| SciCode | 61% | 42.7% |
| FrontierCode | 52.1% | — |
| CursorBench | 55.5% | — |
| LMArena WebDev | 1774 | — |
| FrontierSWE | 61.9% | — |
| LMArena Coding | 1513 | — |
| ALE-Bench | 1,819 | — |
Agentic & Tool Use Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 45.0 (#16), Nova 2.0 Pro Preview: 21.9 (#136)
| Benchmark | Claude Sonnet 5.5 | Nova 2.0 Pro Preview |
|---|---|---|
| APEX-Agents | 75.5% | — |
| GDP.pdf | — | 2% |
Reasoning Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 54.0 (#28), Nova 2.0 Pro Preview: 22.4 (#194)
| Benchmark | Claude Sonnet 5.5 | Nova 2.0 Pro Preview |
|---|---|---|
| CritPt | 31.4% | 0% |
| NYT Connections (extended) | 80.5% | — |
| LMArena Hard Prompts | 1495 | — |
| Mystery Game Puzzles | 65% | — |
| Epoch Capabilities Index | 165.03 | — |
Math Not comparable
Claude Sonnet 5.5: 87.9 (#6), Nova 2.0 Pro Preview: —
| Benchmark | Claude Sonnet 5.5 | Nova 2.0 Pro Preview |
|---|---|---|
| FrontierMath (Tiers 1-3) | 88.8% | — |
| FrontierMath Tier 4 | 80.5% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| ProofBench | 100% | — |
| LMArena Math | 1510 | — |
| FrontierMath Erdős | 2.9% | — |
Knowledge Not comparable
Claude Sonnet 5.5: 66.0 (#12), Nova 2.0 Pro Preview: —
| Benchmark | Claude Sonnet 5.5 | Nova 2.0 Pro Preview |
|---|---|---|
| GPQA Diamond | 95.6% | — |
| SimpleQA Verified | 46.5% | — |
| LMArena Expert | 1540 | — |
Multimodal Not comparable
Claude Sonnet 5.5: 51.5 (#6), Nova 2.0 Pro Preview: —
| Benchmark | Claude Sonnet 5.5 | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Vision | 1289 | — |
| Furniture Assembly | 75% | — |
Multilingual Not comparable
Claude Sonnet 5.5: 55.3 (#30), Nova 2.0 Pro Preview: —
| Benchmark | Claude Sonnet 5.5 | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Non-English | 1452 | — |
| LMArena Chinese | 1522 | — |
| LMArena Russian | 1451 | — |
Instruction Following Not comparable
Claude Sonnet 5.5: 78.3 (#11), Nova 2.0 Pro Preview: —
| Benchmark | Claude Sonnet 5.5 | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Instruction Following | 1495 | — |
Long Context Not comparable
Claude Sonnet 5.5: 45.9 (#28), Nova 2.0 Pro Preview: —
| Benchmark | Claude Sonnet 5.5 | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Longer Query | 1498 | — |
Writing & Preference Not comparable
Claude Sonnet 5.5: 66.0 (#40), Nova 2.0 Pro Preview: —
| Benchmark | Claude Sonnet 5.5 | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Text | 1471 | — |
| LMArena Creative Writing | 1465 | — |
| LMArena Multi-Turn | 1474 | — |
Frequently asked questions
Is Claude Sonnet 5.5 better than Nova 2.0 Pro Preview?
Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 33.4 on the Noometry Index.
Is Claude Sonnet 5.5 or Nova 2.0 Pro Preview better for coding?
Claude Sonnet 5.5 scores higher on coding benchmarks: 67.3 versus 40.8 in the Noometry coding category.
How many benchmarks do Claude Sonnet 5.5 and Nova 2.0 Pro Preview share?
2 benchmarks have published results for both models. Claude Sonnet 5.5 has 32 scored results on Noometry and Nova 2.0 Pro Preview has 3.