# Claude Sonnet 5.5 vs Gemini 1.5 Flash (May 2024)

> Claude Sonnet 5.5 is the stronger model overall, scoring 60.5 to 32.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-sonnet-5-5-vs-gemini-1-5-flash
- Last updated: 2026-10-10
- Shared benchmarks: 2

## Summary

- They share 2 benchmarks with published results for both. Claude Sonnet 5.5 scores higher in 6 categories and Gemini 1.5 Flash (May 2024) in 0 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Sonnet 5.5 leads 88.7 to 20.8.
- 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).

## Snapshot

| | Claude Sonnet 5.5 | Gemini 1.5 Flash (May 2024) |
|---|---|---|
| Provider | Anthropic | Google |
| Noometry Index | 60.5 | 32.9 |
| Rank | 10 | 240 |
| Context | 1M | — |
| Input $/M | $2 | — |
| Output $/M | $10 | — |
| Weights | Proprietary | Proprietary |

## Coding

- Claude Sonnet 5.5: 65.5 (#6)
- Gemini 1.5 Flash (May 2024): 33.9 (#233)

| Benchmark | Claude Sonnet 5.5 | Gemini 1.5 Flash (May 2024) |
|---|---|---|
| FrontierCode | 52.1% | — |
| CursorBench | 55.5% | — |
| LMArena WebDev | 1699 | — |
| FrontierSWE | 61.9% | — |
| SciCode | 61% | — |
| WeirdML | — | 24.9% |
| BigCodeBench Instruct | — | 43.5% |
| LMArena Coding | — | 1262 |
| BigCodeBench Complete | — | 55.1% |
| ALE-Bench | 1,819 | — |
| HumanEval+ | — | 75.6% |
| MBPP+ | — | 67.5% |

## Agentic & Tool Use

- Claude Sonnet 5.5: 44.9 (#14)
- Gemini 1.5 Flash (May 2024): 26.3 (#97)

| Benchmark | Claude Sonnet 5.5 | Gemini 1.5 Flash (May 2024) |
|---|---|---|
| APEX-Agents | 75.5% | — |
| BALROG | — | 14.6% |

## Reasoning

- Claude Sonnet 5.5: 52.4 (#29)
- Gemini 1.5 Flash (May 2024): 20.8 (#212)

| Benchmark | Claude Sonnet 5.5 | Gemini 1.5 Flash (May 2024) |
|---|---|---|
| CritPt | 31.4% | — |
| LMArena Hard Prompts | — | 1257 |
| Mystery Game Puzzles | 65% | — |
| DTBench | — | 53.8% |
| Epoch Capabilities Index | — | 129.37 |
| ForecastBench | — | 53.9 |
| PIQA | — | 87.5% |

## Math

- Claude Sonnet 5.5: 88.7 (#4)
- Gemini 1.5 Flash (May 2024): 20.8 (#274)

| Benchmark | Claude Sonnet 5.5 | Gemini 1.5 Flash (May 2024) |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 100% | 16.3% |
| FrontierMath (Tiers 1-3) | 88.8% | — |
| FrontierMath Tier 4 | 80.5% | — |
| ProofBench | 100% | — |
| Omni-MATH | — | 30.4% |
| LMArena Math | — | 1269 |
| MATH Level 5 | — | 61.9% |
| FrontierMath (Feb 2025 set) | — | 0% |
| GSM8K | — | 82.4% |

## Knowledge

- Claude Sonnet 5.5: 66.0 (#11)
- Gemini 1.5 Flash (May 2024): 26.2 (#253)

| Benchmark | Claude Sonnet 5.5 | Gemini 1.5 Flash (May 2024) |
|---|---|---|
| GPQA Diamond | 95.6% | 47.3% |
| SimpleQA Verified | 46.5% | — |
| MMLU-Pro | — | 67.8% |
| GPQA (HELM) | — | 43.7% |
| LMArena Expert | — | 1233 |
| BoolQ | — | 85.8% |
| MMLU | — | 77.9% |

## Multimodal

- Claude Sonnet 5.5: 53.2 (#5)
- Gemini 1.5 Flash (May 2024): 35.3 (#76)

| Benchmark | Claude Sonnet 5.5 | Gemini 1.5 Flash (May 2024) |
|---|---|---|
| LMArena Vision | — | 1141 |
| Video-MME | — | 70.3% |
| GeoBench | — | 76% |
| Furniture Assembly | 75% | — |

## Multilingual

- Claude Sonnet 5.5: —
- Gemini 1.5 Flash (May 2024): 43.1 (#184)

| Benchmark | Claude Sonnet 5.5 | Gemini 1.5 Flash (May 2024) |
|---|---|---|
| LMArena Non-English | — | 1278 |
| LMArena Chinese | — | 1295 |
| LMArena French | — | 1257 |
| LMArena German | — | 1262 |
| LMArena Japanese | — | 1252 |
| LMArena Korean | — | 1220 |
| LMArena Russian | — | 1288 |
| LMArena Spanish | — | 1242 |

## Instruction Following

- Claude Sonnet 5.5: —
- Gemini 1.5 Flash (May 2024): 67.0 (#199)

| Benchmark | Claude Sonnet 5.5 | Gemini 1.5 Flash (May 2024) |
|---|---|---|
| IFEval | — | 83.1% |
| LMArena Instruction Following | — | 1258 |

## Long Context

- Claude Sonnet 5.5: —
- Gemini 1.5 Flash (May 2024): 39.0 (#182)

| Benchmark | Claude Sonnet 5.5 | Gemini 1.5 Flash (May 2024) |
|---|---|---|
| LMArena Longer Query | — | 1284 |

## Writing & Preference

- Claude Sonnet 5.5: —
- Gemini 1.5 Flash (May 2024): 48.9 (#190)

| Benchmark | Claude Sonnet 5.5 | Gemini 1.5 Flash (May 2024) |
|---|---|---|
| LMArena Text | — | 1287 |
| LMArena Creative Writing | — | 1285 |
| WildBench | — | 79.2% |
| LMArena Multi-Turn | — | 1253 |

## FAQ

### Is Claude Sonnet 5.5 better than Gemini 1.5 Flash (May 2024)?

Claude Sonnet 5.5 is the stronger model overall, scoring 60.5 to 32.9 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: 65.5 versus 33.9 in the Noometry coding category.

### How many benchmarks do Claude Sonnet 5.5 and Gemini 1.5 Flash (May 2024) share?

2 benchmarks have published results for both models. Claude Sonnet 5.5 has 16 scored results on Noometry and Gemini 1.5 Flash (May 2024) has 42.