# Gemini 1.5 Pro (May 2024) vs Gemini 3 Flash Preview

> Gemini 3 Flash Preview is the stronger model overall, scoring 52.3 to 31.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gemini-1-5-pro-vs-gemini-3-flash-preview
- Last updated: 2026-10-10
- Shared benchmarks: 27

## Summary

- They share 27 benchmarks with published results for both. Gemini 1.5 Pro (May 2024) scores higher in 0 categories and Gemini 3 Flash Preview in 10 categories; 10 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Gemini 3 Flash Preview leads 49.2 to 12.3.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 23.1% for Gemini 1.5 Pro (May 2024) and 95.6% for Gemini 3 Flash Preview.

## Snapshot

| | Gemini 1.5 Pro (May 2024) | Gemini 3 Flash Preview |
|---|---|---|
| Provider | Google | Google |
| Noometry Index | 31.9 | 52.3 |
| Rank | 253 | 33 |
| Context | — | 1.05M |
| Input $/M | — | $0.50 |
| Output $/M | — | $3 |
| Weights | Proprietary | Proprietary |

## Coding

- Gemini 1.5 Pro (May 2024): 33.8 (#239)
- Gemini 3 Flash Preview: 51.5 (#35)

| Benchmark | Gemini 1.5 Pro (May 2024) | Gemini 3 Flash Preview |
|---|---|---|
| WeirdML | 22.2% | 61.6% |
| LMArena Coding | 1294 | 1460 |
| SWE-bench Verified | — | 75.4% |
| SWE-bench Verified (bash only) | — | 75.8% |
| LMArena WebDev | — | 1439 |
| SWE-bench Multilingual | — | 72.7% |
| GSO | — | 9.8% |
| BigCodeBench Instruct | 43.8% | — |
| BigCodeBench Complete | 57.5% | — |
| CadEval | 34% | — |
| ALE-Bench | — | 1,367 |
| HumanEval+ | 79.3% | — |
| MBPP+ | 74.6% | — |

## Agentic & Tool Use

- Gemini 1.5 Pro (May 2024): 17.8 (#137)
- Gemini 3 Flash Preview: 38.6 (#27)

| Benchmark | Gemini 1.5 Pro (May 2024) | Gemini 3 Flash Preview |
|---|---|---|
| BALROG | 21% | 48.1% |
| Terminal-Bench | — | 64.3% |
| TheAgentCompany | 3.4% | — |
| τ²-bench Airline | — | 82.5% |
| τ²-bench Banking | — | 27.3% |
| τ²-bench Retail | — | 76.8% |
| τ²-bench Telecom | — | 91.2% |
| Cybench | 7.5% | — |
| DeepResearch Bench | — | 49.8% |
| GDP.pdf | — | 10% |
| LMArena Search | — | 1198 |
| Vending-Bench 2 | — | 3,635 |

## Reasoning

- Gemini 1.5 Pro (May 2024): 12.3 (#332)
- Gemini 3 Flash Preview: 49.2 (#35)

| Benchmark | Gemini 1.5 Pro (May 2024) | Gemini 3 Flash Preview |
|---|---|---|
| ARC-AGI-2 | 0.8% | 33.6% |
| SimpleBench | 27.1% | 61.1% |
| LMArena Hard Prompts | 1296 | 1465 |
| DTBench | 59% | 89.1% |
| Epoch Capabilities Index | 131.73 | 151.83 |
| ForecastBench | 58.4 | 58.5 |
| NYT Connections (extended) | — | 83.1% |
| ARC-AGI-1 | — | 84.7% |
| Chess Puzzles | — | 40% |
| Mystery Game Puzzles | — | 26% |
| LMCA | — | 43.1% |
| BIG-Bench Hard | 89.2% | — |

## Math

- Gemini 1.5 Pro (May 2024): 24.4 (#260)
- Gemini 3 Flash Preview: 51.4 (#42)

| Benchmark | Gemini 1.5 Pro (May 2024) | Gemini 3 Flash Preview |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 23.1% | 95.6% |
| LMArena Math | 1315 | 1472 |
| FrontierMath (Tiers 1-3) | — | 51.2% |
| FrontierMath Tier 4 | — | 17.1% |
| MathArena Final-Answer Competitions | — | 67.6% |
| ProofBench | — | 15% |
| Omni-MATH | 36.4% | — |
| MATH Level 5 | 70.4% | — |
| FrontierMath (Feb 2025 set) | — | 35.6% |
| FrontierMath Tier 4 (v1) | — | 4.2% |

## Knowledge

- Gemini 1.5 Pro (May 2024): 29.3 (#228)
- Gemini 3 Flash Preview: 58.8 (#30)

| Benchmark | Gemini 1.5 Pro (May 2024) | Gemini 3 Flash Preview |
|---|---|---|
| GPQA Diamond | 57.2% | 89.4% |
| LMArena Expert | 1279 | 1461 |
| Humanity's Last Exam | 4.6% | — |
| SimpleQA Verified | — | 66.8% |
| MMLU-Pro | 73.7% | — |
| Confabulations | 13.5% | — |
| Vectara Hallucination Rate | — | 13.5% |
| GPQA (HELM) | 53.4% | — |
| MMLU | 86.9% | — |

## Multimodal

- Gemini 1.5 Pro (May 2024): 36.2 (#72)
- Gemini 3 Flash Preview: 45.3 (#15)

| Benchmark | Gemini 1.5 Pro (May 2024) | Gemini 3 Flash Preview |
|---|---|---|
| LMArena Vision | 1161 | 1285 |
| Video-MME | 75% | — |
| GeoBench | — | 88% |
| VPCT | — | 72.6% |
| Blueprint-Bench 2 | — | 0% |
| LMArena Document | — | 1413 |

## Multilingual

- Gemini 1.5 Pro (May 2024): 45.5 (#169)
- Gemini 3 Flash Preview: 55.9 (#26)

| Benchmark | Gemini 1.5 Pro (May 2024) | Gemini 3 Flash Preview |
|---|---|---|
| LMArena Non-English | 1312 | 1458 |
| LMArena Chinese | 1331 | 1510 |
| LMArena French | 1301 | 1478 |
| LMArena German | 1286 | 1497 |
| LMArena Japanese | 1292 | 1488 |
| LMArena Korean | 1298 | 1443 |
| LMArena Russian | 1320 | 1480 |
| LMArena Spanish | 1310 | 1470 |

## Instruction Following

- Gemini 1.5 Pro (May 2024): 68.8 (#180)
- Gemini 3 Flash Preview: 75.8 (#52)

| Benchmark | Gemini 1.5 Pro (May 2024) | Gemini 3 Flash Preview |
|---|---|---|
| LMArena Instruction Following | 1297 | 1437 |
| IFEval | 83.7% | — |

## Long Context

- Gemini 1.5 Pro (May 2024): 39.7 (#164)
- Gemini 3 Flash Preview: 44.4 (#63)

| Benchmark | Gemini 1.5 Pro (May 2024) | Gemini 3 Flash Preview |
|---|---|---|
| LMArena Longer Query | 1308 | 1452 |

## Writing & Preference

- Gemini 1.5 Pro (May 2024): 52.5 (#167)
- Gemini 3 Flash Preview: 65.6 (#44)

| Benchmark | Gemini 1.5 Pro (May 2024) | Gemini 3 Flash Preview |
|---|---|---|
| LMArena Text | 1319 | 1466 |
| LMArena Creative Writing | 1333 | 1457 |
| LMArena Multi-Turn | 1296 | 1471 |
| WildBench | 81.3% | — |

## FAQ

### Is Gemini 1.5 Pro (May 2024) better than Gemini 3 Flash Preview?

Gemini 3 Flash Preview is the stronger model overall, scoring 52.3 to 31.9 on the Noometry Index.

### Is Gemini 1.5 Pro (May 2024) or Gemini 3 Flash Preview better for coding?

Gemini 3 Flash Preview scores higher on coding benchmarks: 51.5 versus 33.8 in the Noometry coding category.

### How many benchmarks do Gemini 1.5 Pro (May 2024) and Gemini 3 Flash Preview share?

27 benchmarks have published results for both models. Gemini 1.5 Pro (May 2024) has 45 scored results on Noometry and Gemini 3 Flash Preview has 59.