Model comparison
Claude Sonnet 5.5 vs Gemini 2.0 Flash (Feb 2025)
Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 35.1 on the Noometry Index.
Last verified . 16 shared benchmarks.
GoogleSummary
- They share 16 benchmarks with published results for both. Claude Sonnet 5.5 scores higher in 10 categories and Gemini 2.0 Flash (Feb 2025) in 0 categories; 10 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Sonnet 5.5 leads 87.9 to 37.9.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 100% for Claude Sonnet 5.5 and 57.8% for Gemini 2.0 Flash (Feb 2025).
Side by side
| Claude Sonnet 5.5 | Gemini 2.0 Flash (Feb 2025) | |
|---|---|---|
| Provider | Anthropic | |
| Noometry Index | 61.9 | 35.1 |
| Released | 2026-09-28 | 2024-12-06 |
| Weights | Proprietary | Proprietary |
| Context window | 1M | — |
| Max output | 128K | — |
| Input $ / M tokens | $2 | — |
| Output $ / M tokens | $10 | — |
| Results tracked | 32 | 54 |
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), Gemini 2.0 Flash (Feb 2025): 28.4 (#315)
| Benchmark | Claude Sonnet 5.5 | Gemini 2.0 Flash (Feb 2025) |
|---|---|---|
| LMArena Coding | 1513 | 1350 |
| FrontierCode | 52.1% | — |
| SWE-bench Verified (bash only) | — | 13.5% |
| Aider Polyglot | — | 38.2% |
| CursorBench | 55.5% | — |
| LMArena WebDev | 1774 | — |
| FrontierSWE | 61.9% | — |
| SciCode | 61% | — |
| WeirdML | — | 25.8% |
| BigCodeBench Instruct | — | 45.9% |
| LiveBench Coding | — | 63.4% |
| BigCodeBench Complete | — | 59.9% |
| CadEval | — | 30% |
| ALE-Bench | 1,819 | — |
Agentic & Tool Use Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 45.0 (#16), Gemini 2.0 Flash (Feb 2025): 28.1 (#92)
| Benchmark | Claude Sonnet 5.5 | Gemini 2.0 Flash (Feb 2025) |
|---|---|---|
| APEX-Agents | 75.5% | — |
| TheAgentCompany | — | 11.4% |
Reasoning Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 54.0 (#28), Gemini 2.0 Flash (Feb 2025): 15.2 (#318)
| Benchmark | Claude Sonnet 5.5 | Gemini 2.0 Flash (Feb 2025) |
|---|---|---|
| LMArena Hard Prompts | 1495 | 1346 |
| Epoch Capabilities Index | 165.03 | 135.36 |
| ARC-AGI-2 | — | 1.3% |
| SimpleBench | — | 31.1% |
| Kagi LLM Benchmark | — | 37.8% |
| NYT Connections (extended) | 80.5% | — |
| CritPt | 31.4% | — |
| EnigmaEval | — | 1.1% |
| LiveBench Reasoning | — | 78.2% |
| Mystery Game Puzzles | 65% | — |
| DTBench | — | 63.2% |
| LiveBench Data Analysis | — | 69.4% |
| LiveBench | — | 66.9% |
Math Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 87.9 (#6), Gemini 2.0 Flash (Feb 2025): 37.9 (#146)
| Benchmark | Claude Sonnet 5.5 | Gemini 2.0 Flash (Feb 2025) |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 100% | 57.8% |
| LMArena Math | 1510 | 1352 |
| FrontierMath (Tiers 1-3) | 88.8% | — |
| FrontierMath Tier 4 | 80.5% | — |
| ProofBench | 100% | — |
| Omni-MATH | — | 45.9% |
| LiveBench Math | — | 75.8% |
| MATH Level 5 | — | 82.2% |
| FrontierMath (Feb 2025 set) | — | 1.7% |
| FrontierMath Erdős | 2.9% | — |
Knowledge Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 66.0 (#12), Gemini 2.0 Flash (Feb 2025): 32.0 (#213)
| Benchmark | Claude Sonnet 5.5 | Gemini 2.0 Flash (Feb 2025) |
|---|---|---|
| GPQA Diamond | 95.6% | 64.1% |
| LMArena Expert | 1540 | 1339 |
| Humanity's Last Exam | — | 6.6% |
| SimpleQA Verified | 46.5% | — |
| MMLU-Pro | — | 73.7% |
| Confabulations | — | 12.4% |
| GPQA (HELM) | — | 55.6% |
| MMLU | — | 79.7% |
Multimodal Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 51.5 (#6), Gemini 2.0 Flash (Feb 2025): 36.5 (#79)
| Benchmark | Claude Sonnet 5.5 | Gemini 2.0 Flash (Feb 2025) |
|---|---|---|
| LMArena Vision | 1289 | 1158 |
| GeoBench | — | 77% |
| Furniture Assembly | 75% | — |
Multilingual Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 55.3 (#30), Gemini 2.0 Flash (Feb 2025): 47.4 (#149)
| Benchmark | Claude Sonnet 5.5 | Gemini 2.0 Flash (Feb 2025) |
|---|---|---|
| LMArena Non-English | 1452 | 1342 |
| LMArena Chinese | 1522 | 1373 |
| LMArena Russian | 1451 | 1351 |
| LMArena French | — | 1391 |
| LMArena German | — | 1353 |
| LMArena Japanese | — | 1294 |
| LMArena Korean | — | 1313 |
| LMArena Spanish | — | 1363 |
Instruction Following Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 78.3 (#11), Gemini 2.0 Flash (Feb 2025): 74.4 (#97)
| Benchmark | Claude Sonnet 5.5 | Gemini 2.0 Flash (Feb 2025) |
|---|---|---|
| LMArena Instruction Following | 1495 | 1336 |
| LiveBench Instruction Following | — | 85.8% |
| IFEval | — | 84.1% |
Long Context Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 45.9 (#28), Gemini 2.0 Flash (Feb 2025): 38.1 (#203)
| Benchmark | Claude Sonnet 5.5 | Gemini 2.0 Flash (Feb 2025) |
|---|---|---|
| LMArena Longer Query | 1498 | 1344 |
| Fiction.LiveBench | — | 61.1% |
Writing & Preference Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 66.0 (#40), Gemini 2.0 Flash (Feb 2025): 49.5 (#190)
| Benchmark | Claude Sonnet 5.5 | Gemini 2.0 Flash (Feb 2025) |
|---|---|---|
| LMArena Text | 1471 | 1354 |
| LMArena Creative Writing | 1465 | 1340 |
| LMArena Multi-Turn | 1474 | 1350 |
| Short-Story Creative Writing | — | 73.8% |
| EQ-Bench Creative Writing | — | 1128 |
| WildBench | — | 80% |
| LiveBench Language | — | 51.3% |
Frequently asked questions
Is Claude Sonnet 5.5 better than Gemini 2.0 Flash (Feb 2025)?
Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 35.1 on the Noometry Index.
Is Claude Sonnet 5.5 or Gemini 2.0 Flash (Feb 2025) better for coding?
Claude Sonnet 5.5 scores higher on coding benchmarks: 67.3 versus 28.4 in the Noometry coding category.
How many benchmarks do Claude Sonnet 5.5 and Gemini 2.0 Flash (Feb 2025) share?
16 benchmarks have published results for both models. Claude Sonnet 5.5 has 32 scored results on Noometry and Gemini 2.0 Flash (Feb 2025) has 54.