# Gemini 1.5 Flash (May 2024) vs o3

> o3 is the stronger model overall, scoring 47.4 to 32.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gemini-1-5-flash-vs-o3
- Last updated: 2026-10-10
- Shared benchmarks: 32

## Summary

- They share 32 benchmarks with published results for both. Gemini 1.5 Flash (May 2024) scores higher in 0 categories and o3 in 10 categories; 10 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where o3 leads 54.5 to 26.2.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 16.3% for Gemini 1.5 Flash (May 2024) and 84.4% for o3.

## Snapshot

| | Gemini 1.5 Flash (May 2024) | o3 |
|---|---|---|
| Provider | Google | OpenAI |
| Noometry Index | 32.9 | 47.4 |
| Rank | 240 | 53 |
| Context | — | 200K |
| Input $/M | — | $2 |
| Output $/M | — | $8 |
| Weights | Proprietary | Proprietary |

## Coding

- Gemini 1.5 Flash (May 2024): 33.9 (#233)
- o3: 47.3 (#57)

| Benchmark | Gemini 1.5 Flash (May 2024) | o3 |
|---|---|---|
| WeirdML | 24.9% | 52.4% |
| LMArena Coding | 1262 | 1408 |
| SWE-bench Verified | — | 62.3% |
| SWE-bench Verified (bash only) | — | 58.4% |
| Aider Polyglot | — | 81.3% |
| GSO | — | 8.8% |
| BigCodeBench Instruct | 43.5% | — |
| BigCodeBench Complete | 55.1% | — |
| CadEval | — | 74% |
| ALE-Bench | — | 933.55 |
| HumanEval+ | 75.6% | — |
| MBPP+ | 67.5% | — |

## Agentic & Tool Use

- Gemini 1.5 Flash (May 2024): 26.3 (#97)
- o3: 34.3 (#42)

| Benchmark | Gemini 1.5 Flash (May 2024) | o3 |
|---|---|---|
| Berkeley Function Calling Leaderboard | — | 63% |
| GDPval | — | 30.8% |
| DeepResearch Bench | — | 45.2% |
| OSWorld | — | 23% |
| BALROG | 14.6% | — |
| LMArena Search | — | 1144 |
| METR Time Horizons | — | 65.4% |

## Reasoning

- Gemini 1.5 Flash (May 2024): 20.8 (#212)
- o3: 32.1 (#66)

| Benchmark | Gemini 1.5 Flash (May 2024) | o3 |
|---|---|---|
| LMArena Hard Prompts | 1257 | 1402 |
| DTBench | 53.8% | 84.8% |
| Epoch Capabilities Index | 129.37 | 146.88 |
| ForecastBench | 53.9 | 62.5 |
| ARC-AGI-2 | — | 6.5% |
| SimpleBench | — | 53.1% |
| Kagi LLM Benchmark | — | 67.6% |
| ARC-AGI-1 | — | 60.8% |
| CritPt | — | 1.4% |
| Chess Puzzles | — | 38% |
| EnigmaEval | — | 13.1% |
| Mystery Game Puzzles | — | 29% |
| LMCA | — | 39.7% |
| PIQA | 87.5% | — |

## Math

- Gemini 1.5 Flash (May 2024): 20.8 (#274)
- o3: 48.9 (#49)

| Benchmark | Gemini 1.5 Flash (May 2024) | o3 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 16.3% | 84.4% |
| Omni-MATH | 30.4% | 71.4% |
| LMArena Math | 1269 | 1426 |
| MATH Level 5 | 61.9% | 97.8% |
| FrontierMath (Feb 2025 set) | 0% | 18.7% |
| FrontierMath (Tiers 1-3) | — | 33.3% |
| FrontierMath Tier 4 (v1) | — | 2.1% |
| GSM8K | 82.4% | — |

## Knowledge

- Gemini 1.5 Flash (May 2024): 26.2 (#253)
- o3: 54.5 (#47)

| Benchmark | Gemini 1.5 Flash (May 2024) | o3 |
|---|---|---|
| GPQA Diamond | 47.3% | 81.8% |
| MMLU-Pro | 67.8% | 85.9% |
| GPQA (HELM) | 43.7% | 75.3% |
| LMArena Expert | 1233 | 1403 |
| Humanity's Last Exam | — | 20.3% |
| SimpleQA Verified | — | 49.4% |
| Confabulations | — | 14.4% |
| BoolQ | 85.8% | — |
| MMLU | 77.9% | — |

## Multimodal

- Gemini 1.5 Flash (May 2024): 35.3 (#76)
- o3: 40.7 (#35)

| Benchmark | Gemini 1.5 Flash (May 2024) | o3 |
|---|---|---|
| LMArena Vision | 1141 | 1214 |
| GeoBench | 76% | 74% |
| Video-MME | 70.3% | — |
| VPCT | — | 52% |

## Multilingual

- Gemini 1.5 Flash (May 2024): 43.1 (#184)
- o3: 51.9 (#99)

| Benchmark | Gemini 1.5 Flash (May 2024) | o3 |
|---|---|---|
| LMArena Non-English | 1278 | 1402 |
| LMArena Chinese | 1295 | 1438 |
| LMArena French | 1257 | 1430 |
| LMArena German | 1262 | 1420 |
| LMArena Japanese | 1252 | 1404 |
| LMArena Korean | 1220 | 1371 |
| LMArena Russian | 1288 | 1407 |
| LMArena Spanish | 1242 | 1395 |

## Instruction Following

- Gemini 1.5 Flash (May 2024): 67.0 (#199)
- o3: 73.0 (#122)

| Benchmark | Gemini 1.5 Flash (May 2024) | o3 |
|---|---|---|
| IFEval | 83.1% | 86.9% |
| LMArena Instruction Following | 1258 | 1368 |

## Long Context

- Gemini 1.5 Flash (May 2024): 39.0 (#182)
- o3: 53.2 (#6)

| Benchmark | Gemini 1.5 Flash (May 2024) | o3 |
|---|---|---|
| LMArena Longer Query | 1284 | 1372 |
| Fiction.LiveBench | — | 88.9% |
| CL-bench | — | 17.8% |

## Writing & Preference

- Gemini 1.5 Flash (May 2024): 48.9 (#190)
- o3: 63.7 (#62)

| Benchmark | Gemini 1.5 Flash (May 2024) | o3 |
|---|---|---|
| LMArena Text | 1287 | 1410 |
| LMArena Creative Writing | 1285 | 1359 |
| WildBench | 79.2% | 86.1% |
| LMArena Multi-Turn | 1253 | 1405 |
| Short-Story Creative Writing | — | 83.9% |
| EQ-Bench Creative Writing | — | 1676 |

## FAQ

### Is Gemini 1.5 Flash (May 2024) better than o3?

o3 is the stronger model overall, scoring 47.4 to 32.9 on the Noometry Index.

### Is Gemini 1.5 Flash (May 2024) or o3 better for coding?

o3 scores higher on coding benchmarks: 47.3 versus 33.9 in the Noometry coding category.

### How many benchmarks do Gemini 1.5 Flash (May 2024) and o3 share?

32 benchmarks have published results for both models. Gemini 1.5 Flash (May 2024) has 42 scored results on Noometry and o3 has 63.