# Gemini 1.5 Pro (May 2024) vs Gemini 2.5 Flash-Lite

> Gemini 2.5 Flash-Lite is the stronger model overall, scoring 36.4 to 31.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gemini-1-5-pro-vs-gemini-2-5-flash-lite
- Last updated: 2026-10-10
- Shared benchmarks: 26

## Summary

- They share 26 benchmarks with published results for both. Gemini 1.5 Pro (May 2024) scores higher in 2 categories and Gemini 2.5 Flash-Lite in 8 categories; 10 gaps are clear of the uncertainty.
- The widest gap is in math, where Gemini 2.5 Flash-Lite leads 35.5 to 24.4.
- The biggest single-benchmark swing is GPQA (HELM): 53.4% for Gemini 1.5 Pro (May 2024) and 30.9% for Gemini 2.5 Flash-Lite.

## Snapshot

| | Gemini 1.5 Pro (May 2024) | Gemini 2.5 Flash-Lite |
|---|---|---|
| Provider | Google | Google |
| Noometry Index | 31.9 | 36.4 |
| Rank | 253 | 208 |
| Context | — | 1.05M |
| Input $/M | — | $0.10 |
| Output $/M | — | $0.40 |
| Weights | Proprietary | Proprietary |

## Coding

- Gemini 1.5 Pro (May 2024): 33.8 (#239)
- Gemini 2.5 Flash-Lite: 38.0 (#167)

| Benchmark | Gemini 1.5 Pro (May 2024) | Gemini 2.5 Flash-Lite |
|---|---|---|
| WeirdML | 22.2% | 35.2% |
| LMArena Coding | 1294 | 1373 |
| BigCodeBench Instruct | 43.8% | — |
| BigCodeBench Complete | 57.5% | — |
| CadEval | 34% | — |
| ALE-Bench | — | 325.9 |
| HumanEval+ | 79.3% | — |
| MBPP+ | 74.6% | — |

## Agentic & Tool Use

- Gemini 1.5 Pro (May 2024): 17.8 (#137)
- Gemini 2.5 Flash-Lite: 27.8 (#89)

| Benchmark | Gemini 1.5 Pro (May 2024) | Gemini 2.5 Flash-Lite |
|---|---|---|
| Berkeley Function Calling Leaderboard | — | 36.9% |
| TheAgentCompany | 3.4% | — |
| Cybench | 7.5% | — |
| BALROG | 21% | — |

## Reasoning

- Gemini 1.5 Pro (May 2024): 12.3 (#332)
- Gemini 2.5 Flash-Lite: 21.5 (#196)

| Benchmark | Gemini 1.5 Pro (May 2024) | Gemini 2.5 Flash-Lite |
|---|---|---|
| LMArena Hard Prompts | 1296 | 1377 |
| DTBench | 59% | 62.8% |
| Epoch Capabilities Index | 131.73 | 133.93 |
| ARC-AGI-2 | 0.8% | — |
| SimpleBench | 27.1% | — |
| Kagi LLM Benchmark | — | 40.5% |
| LMCA | — | 18.1% |
| BIG-Bench Hard | 89.2% | — |
| ForecastBench | 58.4 | — |

## Math

- Gemini 1.5 Pro (May 2024): 24.4 (#260)
- Gemini 2.5 Flash-Lite: 35.5 (#144)

| Benchmark | Gemini 1.5 Pro (May 2024) | Gemini 2.5 Flash-Lite |
|---|---|---|
| Omni-MATH | 36.4% | 48% |
| LMArena Math | 1315 | 1373 |
| OTIS Mock AIME 2024-2025 | 23.1% | — |
| MATH Level 5 | 70.4% | — |

## Knowledge

- Gemini 1.5 Pro (May 2024): 29.3 (#228)
- Gemini 2.5 Flash-Lite: 32.1 (#206)

| Benchmark | Gemini 1.5 Pro (May 2024) | Gemini 2.5 Flash-Lite |
|---|---|---|
| MMLU-Pro | 73.7% | 53.7% |
| GPQA (HELM) | 53.4% | 30.9% |
| LMArena Expert | 1279 | 1373 |
| GPQA Diamond | 57.2% | — |
| Humanity's Last Exam | 4.6% | — |
| Confabulations | 13.5% | — |
| Vectara Hallucination Rate | — | 3.3% |
| MMLU | 86.9% | — |

## Multimodal

- Gemini 1.5 Pro (May 2024): 36.2 (#72)
- Gemini 2.5 Flash-Lite: 28.6 (#109)

| Benchmark | Gemini 1.5 Pro (May 2024) | Gemini 2.5 Flash-Lite |
|---|---|---|
| LMArena Vision | 1161 | 1198 |
| Video-MME | 75% | — |
| VPCT | — | 30% |

## Multilingual

- Gemini 1.5 Pro (May 2024): 45.5 (#169)
- Gemini 2.5 Flash-Lite: 49.5 (#129)

| Benchmark | Gemini 1.5 Pro (May 2024) | Gemini 2.5 Flash-Lite |
|---|---|---|
| LMArena Non-English | 1312 | 1369 |
| LMArena Chinese | 1331 | 1404 |
| LMArena French | 1301 | 1388 |
| LMArena German | 1286 | 1390 |
| LMArena Japanese | 1292 | 1359 |
| LMArena Korean | 1298 | 1358 |
| LMArena Russian | 1320 | 1373 |
| LMArena Spanish | 1310 | 1396 |

## Instruction Following

- Gemini 1.5 Pro (May 2024): 68.8 (#180)
- Gemini 2.5 Flash-Lite: 70.2 (#163)

| Benchmark | Gemini 1.5 Pro (May 2024) | Gemini 2.5 Flash-Lite |
|---|---|---|
| IFEval | 83.7% | 81% |
| LMArena Instruction Following | 1297 | 1366 |

## Long Context

- Gemini 1.5 Pro (May 2024): 39.7 (#164)
- Gemini 2.5 Flash-Lite: 33.3 (#257)

| Benchmark | Gemini 1.5 Pro (May 2024) | Gemini 2.5 Flash-Lite |
|---|---|---|
| LMArena Longer Query | 1308 | 1373 |
| Fiction.LiveBench | — | 47.2% |

## Writing & Preference

- Gemini 1.5 Pro (May 2024): 52.5 (#167)
- Gemini 2.5 Flash-Lite: 57.0 (#130)

| Benchmark | Gemini 1.5 Pro (May 2024) | Gemini 2.5 Flash-Lite |
|---|---|---|
| LMArena Text | 1319 | 1379 |
| LMArena Creative Writing | 1333 | 1366 |
| WildBench | 81.3% | 81.8% |
| LMArena Multi-Turn | 1296 | 1367 |

## FAQ

### Is Gemini 1.5 Pro (May 2024) better than Gemini 2.5 Flash-Lite?

Gemini 2.5 Flash-Lite is the stronger model overall, scoring 36.4 to 31.9 on the Noometry Index.

### Is Gemini 1.5 Pro (May 2024) or Gemini 2.5 Flash-Lite better for coding?

Gemini 2.5 Flash-Lite scores higher on coding benchmarks: 38.0 versus 33.8 in the Noometry coding category.

### How many benchmarks do Gemini 1.5 Pro (May 2024) and Gemini 2.5 Flash-Lite share?

26 benchmarks have published results for both models. Gemini 1.5 Pro (May 2024) has 45 scored results on Noometry and Gemini 2.5 Flash-Lite has 33.