Model comparison
Claude Sonnet 5.5 vs Gemini 1.5 Flash (May 2024)
Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 33.2 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 1.5 Flash (May 2024) 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 22.1.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 100% for Claude Sonnet 5.5 and 16.3% for Gemini 1.5 Flash (May 2024).
Side by side
| Claude Sonnet 5.5 | Gemini 1.5 Flash (May 2024) | |
|---|---|---|
| Provider | Anthropic | |
| Noometry Index | 61.9 | 33.2 |
| Released | 2026-09-28 | 2024-05-14 |
| Weights | Proprietary | Proprietary |
| Context window | 1M | — |
| Max output | 128K | — |
| Input $ / M tokens | $2 | — |
| Output $ / M tokens | $10 | — |
| Results tracked | 32 | 42 |
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Category by category
Coding Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 67.3 (#6), Gemini 1.5 Flash (May 2024): 34.4 (#236)
| Benchmark | Claude Sonnet 5.5 | Gemini 1.5 Flash (May 2024) |
|---|---|---|
| LMArena Coding | 1513 | 1261 |
| FrontierCode | 52.1% | — |
| CursorBench | 55.5% | — |
| LMArena WebDev | 1774 | — |
| FrontierSWE | 61.9% | — |
| SciCode | 61% | — |
| WeirdML | — | 24.9% |
| BigCodeBench Instruct | — | 43.5% |
| BigCodeBench Complete | — | 55.1% |
| ALE-Bench | 1,819 | — |
| HumanEval+ | — | 75.6% |
| MBPP+ | — | 67.5% |
Agentic & Tool Use Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 45.0 (#16), Gemini 1.5 Flash (May 2024): 26.6 (#102)
| Benchmark | Claude Sonnet 5.5 | Gemini 1.5 Flash (May 2024) |
|---|---|---|
| APEX-Agents | 75.5% | — |
| BALROG | — | 14.6% |
Reasoning Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 54.0 (#28), Gemini 1.5 Flash (May 2024): 21.7 (#215)
| Benchmark | Claude Sonnet 5.5 | Gemini 1.5 Flash (May 2024) |
|---|---|---|
| LMArena Hard Prompts | 1495 | 1257 |
| Epoch Capabilities Index | 165.03 | 129.36 |
| NYT Connections (extended) | 80.5% | — |
| CritPt | 31.4% | — |
| Mystery Game Puzzles | 65% | — |
| DTBench | — | 53.8% |
| ForecastBench | — | 53.9 |
| PIQA | — | 87.5% |
Math Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 87.9 (#6), Gemini 1.5 Flash (May 2024): 22.1 (#281)
| Benchmark | Claude Sonnet 5.5 | Gemini 1.5 Flash (May 2024) |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 100% | 16.3% |
| LMArena Math | 1510 | 1269 |
| FrontierMath (Tiers 1-3) | 88.8% | — |
| FrontierMath Tier 4 | 80.5% | — |
| ProofBench | 100% | — |
| Omni-MATH | — | 30.4% |
| MATH Level 5 | — | 61.9% |
| FrontierMath (Feb 2025 set) | — | 0% |
| FrontierMath Erdős | 2.9% | — |
| GSM8K | — | 82.4% |
Knowledge Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 66.0 (#12), Gemini 1.5 Flash (May 2024): 26.2 (#260)
| Benchmark | Claude Sonnet 5.5 | Gemini 1.5 Flash (May 2024) |
|---|---|---|
| GPQA Diamond | 95.6% | 47.3% |
| LMArena Expert | 1540 | 1233 |
| SimpleQA Verified | 46.5% | — |
| MMLU-Pro | — | 67.8% |
| GPQA (HELM) | — | 43.7% |
| BoolQ | — | 85.8% |
| MMLU | — | 77.9% |
Multimodal Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 51.5 (#6), Gemini 1.5 Flash (May 2024): 36.0 (#81)
| Benchmark | Claude Sonnet 5.5 | Gemini 1.5 Flash (May 2024) |
|---|---|---|
| LMArena Vision | 1289 | 1141 |
| Video-MME | — | 70.3% |
| GeoBench | — | 76% |
| Furniture Assembly | 75% | — |
Multilingual Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 55.3 (#30), Gemini 1.5 Flash (May 2024): 42.9 (#189)
| Benchmark | Claude Sonnet 5.5 | Gemini 1.5 Flash (May 2024) |
|---|---|---|
| LMArena Non-English | 1452 | 1278 |
| LMArena Chinese | 1522 | 1295 |
| LMArena Russian | 1451 | 1288 |
| LMArena French | — | 1258 |
| LMArena German | — | 1262 |
| LMArena Japanese | — | 1252 |
| LMArena Korean | — | 1221 |
| LMArena Spanish | — | 1243 |
Instruction Following Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 78.3 (#11), Gemini 1.5 Flash (May 2024): 66.8 (#205)
| Benchmark | Claude Sonnet 5.5 | Gemini 1.5 Flash (May 2024) |
|---|---|---|
| LMArena Instruction Following | 1495 | 1258 |
| IFEval | — | 83.1% |
Long Context Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 45.9 (#28), Gemini 1.5 Flash (May 2024): 39.0 (#187)
| Benchmark | Claude Sonnet 5.5 | Gemini 1.5 Flash (May 2024) |
|---|---|---|
| LMArena Longer Query | 1498 | 1284 |
Writing & Preference Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 66.0 (#40), Gemini 1.5 Flash (May 2024): 48.7 (#196)
| Benchmark | Claude Sonnet 5.5 | Gemini 1.5 Flash (May 2024) |
|---|---|---|
| LMArena Text | 1471 | 1287 |
| LMArena Creative Writing | 1465 | 1285 |
| LMArena Multi-Turn | 1474 | 1253 |
| WildBench | — | 79.2% |
Frequently asked questions
Is Claude Sonnet 5.5 better than Gemini 1.5 Flash (May 2024)?
Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 33.2 on the Noometry Index.
Is Claude Sonnet 5.5 or Gemini 1.5 Flash (May 2024) better for coding?
Claude Sonnet 5.5 scores higher on coding benchmarks: 67.3 versus 34.4 in the Noometry coding category.
How many benchmarks do Claude Sonnet 5.5 and Gemini 1.5 Flash (May 2024) share?
16 benchmarks have published results for both models. Claude Sonnet 5.5 has 32 scored results on Noometry and Gemini 1.5 Flash (May 2024) has 42.