# Gemini 1.5 Pro (May 2024) vs Gemini 3.5 Flash Lite

> Gemini 3.5 Flash Lite is the stronger model overall, scoring 41.8 to 31.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gemini-1-5-pro-vs-gemini-3-5-flash-lite
- Last updated: 2026-10-10
- Shared benchmarks: 24

## Summary

- They share 24 benchmarks with published results for both. Gemini 1.5 Pro (May 2024) scores higher in 0 categories and Gemini 3.5 Flash Lite in 10 categories; 10 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Gemini 3.5 Flash Lite leads 50.0 to 29.3.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 23.1% for Gemini 1.5 Pro (May 2024) and 71.1% for Gemini 3.5 Flash Lite.

## Snapshot

| | Gemini 1.5 Pro (May 2024) | Gemini 3.5 Flash Lite |
|---|---|---|
| Provider | Google | Google |
| Noometry Index | 31.9 | 41.8 |
| Rank | 253 | 113 |
| Context | — | 1.05M |
| Input $/M | — | $0.30 |
| Output $/M | — | $2.50 |
| Weights | Proprietary | Proprietary |

## Coding

- Gemini 1.5 Pro (May 2024): 33.8 (#239)
- Gemini 3.5 Flash Lite: 42.1 (#96)

| Benchmark | Gemini 1.5 Pro (May 2024) | Gemini 3.5 Flash Lite |
|---|---|---|
| WeirdML | 22.2% | 39% |
| LMArena Coding | 1294 | 1455 |
| LMArena WebDev | — | 1440 |
| SciCode | — | 41.3% |
| BigCodeBench Instruct | 43.8% | — |
| BigCodeBench Complete | 57.5% | — |
| CadEval | 34% | — |
| ALE-Bench | — | 765.27 |
| HumanEval+ | 79.3% | — |
| MBPP+ | 74.6% | — |

## Agentic & Tool Use

- Gemini 1.5 Pro (May 2024): 17.8 (#137)
- Gemini 3.5 Flash Lite: 28.6 (#82)

| Benchmark | Gemini 1.5 Pro (May 2024) | Gemini 3.5 Flash Lite |
|---|---|---|
| TheAgentCompany | 3.4% | — |
| Cybench | 7.5% | — |
| BALROG | 21% | — |
| GDP.pdf | — | 10% |

## Reasoning

- Gemini 1.5 Pro (May 2024): 12.3 (#332)
- Gemini 3.5 Flash Lite: 27.8 (#95)

| Benchmark | Gemini 1.5 Pro (May 2024) | Gemini 3.5 Flash Lite |
|---|---|---|
| ARC-AGI-2 | 0.8% | 10.3% |
| LMArena Hard Prompts | 1296 | 1441 |
| DTBench | 59% | 83.5% |
| Epoch Capabilities Index | 131.73 | 145.12 |
| SimpleBench | 27.1% | — |
| NYT Connections (extended) | — | 60.4% |
| ARC-AGI-1 | — | 53.5% |
| CritPt | — | 0% |
| Chess Puzzles | — | 22% |
| Mystery Game Puzzles | — | 19% |
| LMCA | — | 37.6% |
| BIG-Bench Hard | 89.2% | — |
| ForecastBench | 58.4 | — |

## Math

- Gemini 1.5 Pro (May 2024): 24.4 (#260)
- Gemini 3.5 Flash Lite: 25.7 (#245)

| Benchmark | Gemini 1.5 Pro (May 2024) | Gemini 3.5 Flash Lite |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 23.1% | 71.1% |
| LMArena Math | 1315 | 1431 |
| FrontierMath (Tiers 1-3) | — | 26% |
| FrontierMath Tier 4 | — | 0% |
| ProofBench | — | 13% |
| Omni-MATH | 36.4% | — |
| MATH Level 5 | 70.4% | — |

## Knowledge

- Gemini 1.5 Pro (May 2024): 29.3 (#228)
- Gemini 3.5 Flash Lite: 50.0 (#66)

| Benchmark | Gemini 1.5 Pro (May 2024) | Gemini 3.5 Flash Lite |
|---|---|---|
| GPQA Diamond | 57.2% | 83.3% |
| LMArena Expert | 1279 | 1430 |
| Humanity's Last Exam | 4.6% | — |
| MMLU-Pro | 73.7% | — |
| Confabulations | 13.5% | — |
| GPQA (HELM) | 53.4% | — |
| MMLU | 86.9% | — |

## Multimodal

- Gemini 1.5 Pro (May 2024): 36.2 (#72)
- Gemini 3.5 Flash Lite: 40.3 (#38)

| Benchmark | Gemini 1.5 Pro (May 2024) | Gemini 3.5 Flash Lite |
|---|---|---|
| LMArena Vision | 1161 | 1266 |
| Video-MME | 75% | — |

## Multilingual

- Gemini 1.5 Pro (May 2024): 45.5 (#169)
- Gemini 3.5 Flash Lite: 53.8 (#59)

| Benchmark | Gemini 1.5 Pro (May 2024) | Gemini 3.5 Flash Lite |
|---|---|---|
| LMArena Non-English | 1312 | 1428 |
| LMArena Chinese | 1331 | 1467 |
| LMArena French | 1301 | 1452 |
| LMArena German | 1286 | 1454 |
| LMArena Japanese | 1292 | 1428 |
| LMArena Korean | 1298 | 1406 |
| LMArena Russian | 1320 | 1443 |
| LMArena Spanish | 1310 | 1440 |

## Instruction Following

- Gemini 1.5 Pro (May 2024): 68.8 (#180)
- Gemini 3.5 Flash Lite: 75.0 (#77)

| Benchmark | Gemini 1.5 Pro (May 2024) | Gemini 3.5 Flash Lite |
|---|---|---|
| LMArena Instruction Following | 1297 | 1420 |
| IFEval | 83.7% | — |

## Long Context

- Gemini 1.5 Pro (May 2024): 39.7 (#164)
- Gemini 3.5 Flash Lite: 43.8 (#80)

| Benchmark | Gemini 1.5 Pro (May 2024) | Gemini 3.5 Flash Lite |
|---|---|---|
| LMArena Longer Query | 1308 | 1435 |

## Writing & Preference

- Gemini 1.5 Pro (May 2024): 52.5 (#167)
- Gemini 3.5 Flash Lite: 64.4 (#55)

| Benchmark | Gemini 1.5 Pro (May 2024) | Gemini 3.5 Flash Lite |
|---|---|---|
| LMArena Text | 1319 | 1436 |
| LMArena Creative Writing | 1333 | 1419 |
| LMArena Multi-Turn | 1296 | 1445 |
| EQ-Bench Creative Writing | — | 1559 |
| WildBench | 81.3% | — |

## FAQ

### Is Gemini 1.5 Pro (May 2024) better than Gemini 3.5 Flash Lite?

Gemini 3.5 Flash Lite is the stronger model overall, scoring 41.8 to 31.9 on the Noometry Index.

### Is Gemini 1.5 Pro (May 2024) or Gemini 3.5 Flash Lite better for coding?

Gemini 3.5 Flash Lite scores higher on coding benchmarks: 42.1 versus 33.8 in the Noometry coding category.

### How many benchmarks do Gemini 1.5 Pro (May 2024) and Gemini 3.5 Flash Lite share?

24 benchmarks have published results for both models. Gemini 1.5 Pro (May 2024) has 45 scored results on Noometry and Gemini 3.5 Flash Lite has 38.