Model comparison
Claude Sonnet 5.5 vs Gemini 3 Pro
Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 54.8 on the Noometry Index.
Last verified . 21 shared benchmarks.
GoogleSummary
- They share 21 benchmarks with published results for both. Claude Sonnet 5.5 scores higher in 7 categories and Gemini 3 Pro in 3 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Sonnet 5.5 leads 87.9 to 49.9.
- The biggest single-benchmark swing is ProofBench: 100% for Claude Sonnet 5.5 and 20% for Gemini 3 Pro.
Side by side
| Claude Sonnet 5.5 | Gemini 3 Pro | |
|---|---|---|
| Provider | Anthropic | |
| Noometry Index | 61.9 | 54.8 |
| Released | 2026-09-28 | 2025-11-18 |
| Weights | Proprietary | Proprietary |
| Context window | 1M | — |
| Max output | 128K | — |
| Input $ / M tokens | $2 | — |
| Output $ / M tokens | $10 | — |
| Results tracked | 32 | 67 |
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Category by category
Coding Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 67.3 (#6), Gemini 3 Pro: 51.6 (#39)
| Benchmark | Claude Sonnet 5.5 | Gemini 3 Pro |
|---|---|---|
| LMArena WebDev | 1774 | 1440 |
| LMArena Coding | 1513 | 1481 |
| ALE-Bench | 1,819 | 1,177 |
| SWE-bench Verified | — | 72.9% |
| FrontierCode | 52.1% | — |
| SWE-bench Verified (bash only) | — | 74.2% |
| CursorBench | 55.5% | — |
| SWE-bench Multilingual | — | 68.7% |
| FrontierSWE | 61.9% | — |
| SciCode | 61% | — |
| GSO | — | 18.6% |
| WeirdML | — | 69.9% |
| AlgoTune | — | 1.83 |
Agentic & Tool Use Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 45.0 (#16), Gemini 3 Pro: 40.6 (#23)
| Benchmark | Claude Sonnet 5.5 | Gemini 3 Pro |
|---|---|---|
| Terminal-Bench | — | 69.4% |
| APEX-Agents | 75.5% | — |
| Berkeley Function Calling Leaderboard | — | 72.5% |
| GDPval | — | 40.3% |
| Remote Labor Index | — | 1.3% |
| τ²-bench Airline | — | 80.5% |
| τ²-bench Banking | — | 18% |
| τ²-bench Retail | — | 75.9% |
| τ²-bench Telecom | — | 91% |
| DeepResearch Bench | — | 46.3% |
| BALROG | — | 58.1% |
| LMArena Search | — | 1207 |
| METR Time Horizons | — | 71% |
| Vending-Bench 2 | — | 5,478 |
Reasoning Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 54.0 (#28), Gemini 3 Pro: 52.5 (#31)
| Benchmark | Claude Sonnet 5.5 | Gemini 3 Pro |
|---|---|---|
| NYT Connections (extended) | 80.5% | 94.4% |
| CritPt | 31.4% | 6.9% |
| LMArena Hard Prompts | 1495 | 1480 |
| Epoch Capabilities Index | 165.03 | 152.92 |
| ARC-AGI-2 | — | 31.1% |
| SimpleBench | — | 76.4% |
| Kagi LLM Benchmark | — | 80.1% |
| ARC-AGI-1 | — | 75% |
| Chess Puzzles | — | 31% |
| EnigmaEval | — | 18.2% |
| Mystery Game Puzzles | 65% | — |
| ForecastBench | — | 61.2 |
Math Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 87.9 (#6), Gemini 3 Pro: 49.9 (#59)
| Benchmark | Claude Sonnet 5.5 | Gemini 3 Pro |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 100% | 91.4% |
| ProofBench | 100% | 20% |
| LMArena Math | 1510 | 1476 |
| FrontierMath (Tiers 1-3) | 88.8% | — |
| FrontierMath Tier 4 | 80.5% | — |
| MathArena Final-Answer Competitions | — | 67% |
| Omni-MATH | — | 55.5% |
| FrontierMath (Feb 2025 set) | — | 37.6% |
| FrontierMath Erdős | 2.9% | — |
| FrontierMath Tier 4 (v1) | — | 18.8% |
Knowledge Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 66.0 (#12), Gemini 3 Pro: 64.4 (#16)
| Benchmark | Claude Sonnet 5.5 | Gemini 3 Pro |
|---|---|---|
| GPQA Diamond | 95.6% | 92.6% |
| LMArena Expert | 1540 | 1475 |
| Humanity's Last Exam | — | 37.5% |
| SimpleQA Verified | 46.5% | — |
| MMLU-Pro | — | 90.3% |
| Vectara Hallucination Rate | — | 13.6% |
| GPQA (HELM) | — | 80.3% |
Multimodal Gemini 3 Pro leads
Claude Sonnet 5.5: 51.5 (#6), Gemini 3 Pro: 57.6 (#2)
| Benchmark | Claude Sonnet 5.5 | Gemini 3 Pro |
|---|---|---|
| LMArena Vision | 1289 | 1305 |
| GeoBench | — | 84% |
| VPCT | — | 91% |
| Furniture Assembly | 75% | — |
| LMArena Document | — | 1434 |
Multilingual Gemini 3 Pro leads
Claude Sonnet 5.5: 55.3 (#30), Gemini 3 Pro: 56.9 (#16)
| Benchmark | Claude Sonnet 5.5 | Gemini 3 Pro |
|---|---|---|
| LMArena Non-English | 1452 | 1474 |
| LMArena Chinese | 1522 | 1523 |
| LMArena Russian | 1451 | 1493 |
| LMArena French | — | 1492 |
| LMArena German | — | 1515 |
| LMArena Japanese | — | 1510 |
| LMArena Korean | — | 1448 |
| LMArena Spanish | — | 1470 |
Instruction Following Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 78.3 (#11), Gemini 3 Pro: 76.3 (#45)
| Benchmark | Claude Sonnet 5.5 | Gemini 3 Pro |
|---|---|---|
| LMArena Instruction Following | 1495 | 1458 |
| IFEval | — | 87.7% |
Long Context Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 45.9 (#28), Gemini 3 Pro: 44.0 (#79)
| Benchmark | Claude Sonnet 5.5 | Gemini 3 Pro |
|---|---|---|
| LMArena Longer Query | 1498 | 1471 |
| CL-bench | — | 15.8% |
Writing & Preference Too close to call
Claude Sonnet 5.5: 66.0 (#40), Gemini 3 Pro: 66.4 (#35)
| Benchmark | Claude Sonnet 5.5 | Gemini 3 Pro |
|---|---|---|
| LMArena Text | 1471 | 1479 |
| LMArena Creative Writing | 1465 | 1482 |
| LMArena Multi-Turn | 1474 | 1484 |
| EQ-Bench Creative Writing | — | 1525 |
| WildBench | — | 85.9% |
Frequently asked questions
Is Claude Sonnet 5.5 better than Gemini 3 Pro?
Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 54.8 on the Noometry Index.
Is Claude Sonnet 5.5 or Gemini 3 Pro better for coding?
Claude Sonnet 5.5 scores higher on coding benchmarks: 67.3 versus 51.6 in the Noometry coding category.
How many benchmarks do Claude Sonnet 5.5 and Gemini 3 Pro share?
21 benchmarks have published results for both models. Claude Sonnet 5.5 has 32 scored results on Noometry and Gemini 3 Pro has 67.