# Gemini 3 Flash Preview vs GPT-4.5

> Gemini 3 Flash Preview is the stronger model overall, scoring 52.3 to 37.2 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gemini-3-flash-preview-vs-gpt-4-5
- Last updated: 2026-10-11
- Shared benchmarks: 26

## Summary

- They share 26 benchmarks with published results for both. Gemini 3 Flash Preview scores higher in 10 categories and GPT-4.5 in 0 categories; 10 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Gemini 3 Flash Preview leads 49.2 to 13.9.
- The biggest single-benchmark swing is ARC-AGI-1: 84.7% for Gemini 3 Flash Preview and 10.3% for GPT-4.5.

## Snapshot

| | Gemini 3 Flash Preview | GPT-4.5 |
|---|---|---|
| Provider | Google | OpenAI |
| Noometry Index | 52.3 | 37.2 |
| Rank | 40 | 208 |
| Context | 1.05M | — |
| Input $/M | $0.50 | — |
| Output $/M | $3 | — |
| Weights | Proprietary | Proprietary |

## Coding

- Gemini 3 Flash Preview: 50.9 (#42)
- GPT-4.5: 42.2 (#109)

| Benchmark | Gemini 3 Flash Preview | GPT-4.5 |
|---|---|---|
| WeirdML | 61.6% | 39.4% |
| LMArena Coding | 1460 | 1396 |
| SWE-bench Verified | 75.4% | — |
| SWE-bench Verified (bash only) | 75.8% | — |
| Aider Polyglot | — | 44.9% |
| LMArena WebDev | 1439 | — |
| SWE-bench Multilingual | 72.7% | — |
| GSO | 9.8% | — |
| LiveBench Coding | — | 75.2% |
| ALE-Bench | 1,367 | — |

## Agentic & Tool Use

- Gemini 3 Flash Preview: 38.7 (#29)
- GPT-4.5: 27.9 (#97)

| Benchmark | Gemini 3 Flash Preview | GPT-4.5 |
|---|---|---|
| Terminal-Bench | 64.3% | — |
| τ²-bench Airline | 82.5% | — |
| τ²-bench Banking | 27.3% | — |
| τ²-bench Retail | 76.8% | — |
| τ²-bench Telecom | 91.2% | — |
| Cybench | — | 17.5% |
| DeepResearch Bench | 49.8% | — |
| BALROG | 48.1% | — |
| GDP.pdf | 10% | — |
| LMArena Search | 1198 | — |
| Vending-Bench 2 | 3,635 | — |

## Reasoning

- Gemini 3 Flash Preview: 49.2 (#37)
- GPT-4.5: 13.9 (#330)

| Benchmark | Gemini 3 Flash Preview | GPT-4.5 |
|---|---|---|
| ARC-AGI-2 | 33.6% | 0.8% |
| SimpleBench | 61.1% | 34.5% |
| ARC-AGI-1 | 84.7% | 10.3% |
| LMArena Hard Prompts | 1465 | 1403 |
| Epoch Capabilities Index | 151.8 | 136.74 |
| ForecastBench | 58.5 | 61.7 |
| NYT Connections (extended) | 83.1% | — |
| Chess Puzzles | 40% | — |
| EnigmaEval | — | 3.2% |
| LiveBench Reasoning | — | 71.1% |
| Mystery Game Puzzles | 26% | — |
| DTBench | 89.1% | — |
| LiveBench Data Analysis | — | 64.3% |
| LMCA | 43.1% | — |
| LiveBench | — | 69% |

## Math

- Gemini 3 Flash Preview: 51.7 (#55)
- GPT-4.5: 32.6 (#211)

| Benchmark | Gemini 3 Flash Preview | GPT-4.5 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 95.6% | 37.8% |
| LMArena Math | 1473 | 1412 |
| FrontierMath (Tiers 1-3) | 51.2% | — |
| FrontierMath Tier 4 | 17.1% | — |
| MathArena Final-Answer Competitions | 67.6% | — |
| ProofBench | 15% | — |
| LiveBench Math | — | 69.3% |
| MATH Level 5 | — | 78.6% |
| FrontierMath (Feb 2025 set) | 35.6% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |

## Knowledge

- Gemini 3 Flash Preview: 58.8 (#33)
- GPT-4.5: 32.5 (#211)

| Benchmark | Gemini 3 Flash Preview | GPT-4.5 |
|---|---|---|
| GPQA Diamond | 89.4% | 68.7% |
| LMArena Expert | 1462 | 1394 |
| Humanity's Last Exam | — | 5.4% |
| SimpleQA Verified | 66.8% | — |
| Confabulations | — | 13.6% |
| Vectara Hallucination Rate | 13.5% | — |

## Multimodal

- Gemini 3 Flash Preview: 45.5 (#16)
- GPT-4.5: 37.6 (#71)

| Benchmark | Gemini 3 Flash Preview | GPT-4.5 |
|---|---|---|
| LMArena Vision | 1285 | 1195 |
| VPCT | 72.6% | 45% |
| GeoBench | 88% | — |
| Blueprint-Bench 2 | 0% | — |
| LMArena Document | 1413 | — |

## Multilingual

- Gemini 3 Flash Preview: 55.7 (#27)
- GPT-4.5: 52.5 (#83)

| Benchmark | Gemini 3 Flash Preview | GPT-4.5 |
|---|---|---|
| LMArena Non-English | 1458 | 1413 |
| LMArena Chinese | 1511 | 1421 |
| LMArena French | 1477 | 1418 |
| LMArena German | 1497 | 1457 |
| LMArena Japanese | 1489 | 1416 |
| LMArena Korean | 1443 | 1392 |
| LMArena Russian | 1480 | 1419 |
| LMArena Spanish | 1469 | — |

## Instruction Following

- Gemini 3 Flash Preview: 75.7 (#56)
- GPT-4.5: 72.6 (#134)

| Benchmark | Gemini 3 Flash Preview | GPT-4.5 |
|---|---|---|
| LMArena Instruction Following | 1437 | 1404 |
| LiveBench Instruction Following | — | 72.3% |

## Long Context

- Gemini 3 Flash Preview: 44.4 (#67)
- GPT-4.5: 40.4 (#155)

| Benchmark | Gemini 3 Flash Preview | GPT-4.5 |
|---|---|---|
| LMArena Longer Query | 1452 | 1406 |
| Fiction.LiveBench | — | 63.9% |

## Writing & Preference

- Gemini 3 Flash Preview: 65.5 (#45)
- GPT-4.5: 56.9 (#134)

| Benchmark | Gemini 3 Flash Preview | GPT-4.5 |
|---|---|---|
| LMArena Text | 1466 | 1417 |
| LMArena Creative Writing | 1457 | 1394 |
| LMArena Multi-Turn | 1471 | 1444 |
| Short-Story Creative Writing | — | 75.6% |
| EQ-Bench Creative Writing | — | 1258 |
| LiveBench Language | — | 61.5% |

## FAQ

### Is Gemini 3 Flash Preview better than GPT-4.5?

Gemini 3 Flash Preview is the stronger model overall, scoring 52.3 to 37.2 on the Noometry Index.

### Is Gemini 3 Flash Preview or GPT-4.5 better for coding?

Gemini 3 Flash Preview scores higher on coding benchmarks: 50.9 versus 42.2 in the Noometry coding category.

### How many benchmarks do Gemini 3 Flash Preview and GPT-4.5 share?

26 benchmarks have published results for both models. Gemini 3 Flash Preview has 59 scored results on Noometry and GPT-4.5 has 42.