Model comparison
Gemini 1.5 Flash (May 2024) vs o3-pro
o3-pro is the stronger model overall, scoring 42.9 to 33.2 on the Noometry Index.
Last verified . 3 shared benchmarks.
GoogleSummary
- They share 3 benchmarks with published results for both. Gemini 1.5 Flash (May 2024) scores higher in 0 categories and o3-pro in 5 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in long context, where o3-pro leads 72.2 to 39.0.
- The biggest single-benchmark swing is WeirdML: 24.9% for Gemini 1.5 Flash (May 2024) and 58.2% for o3-pro.
Side by side
| Gemini 1.5 Flash (May 2024) | o3-pro | |
|---|---|---|
| Provider | OpenAI | |
| Noometry Index | 33.2 | 42.9 |
| Released | 2024-05-14 | 2025-06-10 |
| Weights | Proprietary | Proprietary |
| Context window | — | 200K |
| Max output | — | 100K |
| Input $ / M tokens | — | $20 |
| Output $ / M tokens | — | $80 |
| Results tracked | 42 | 12 |
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Category by category
Coding o3-pro leads
Gemini 1.5 Flash (May 2024): 34.4 (#236), o3-pro: 55.5 (#24)
| Benchmark | Gemini 1.5 Flash (May 2024) | o3-pro |
|---|---|---|
| WeirdML | 24.9% | 58.2% |
| Aider Polyglot | — | 84.9% |
| BigCodeBench Instruct | 43.5% | — |
| LMArena Coding | 1261 | — |
| BigCodeBench Complete | 55.1% | — |
| HumanEval+ | 75.6% | — |
| MBPP+ | 67.5% | — |
Agentic & Tool Use Not comparable
Gemini 1.5 Flash (May 2024): 26.6 (#102), o3-pro: —
| Benchmark | Gemini 1.5 Flash (May 2024) | o3-pro |
|---|---|---|
| BALROG | 14.6% | — |
Reasoning o3-pro leads
Gemini 1.5 Flash (May 2024): 21.7 (#215), o3-pro: 23.8 (#171)
| Benchmark | Gemini 1.5 Flash (May 2024) | o3-pro |
|---|---|---|
| DTBench | 53.8% | 86.9% |
| Epoch Capabilities Index | 129.36 | 147.42 |
| ARC-AGI-2 | — | 4.9% |
| Kagi LLM Benchmark | — | 72.1% |
| ARC-AGI-1 | — | 59.3% |
| LMArena Hard Prompts | 1257 | — |
| LMCA | — | 38.5% |
| ForecastBench | 53.9 | — |
| PIQA | 87.5% | — |
Math Not comparable
Gemini 1.5 Flash (May 2024): 22.1 (#281), o3-pro: —
| Benchmark | Gemini 1.5 Flash (May 2024) | o3-pro |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 16.3% | — |
| Omni-MATH | 30.4% | — |
| LMArena Math | 1269 | — |
| MATH Level 5 | 61.9% | — |
| FrontierMath (Feb 2025 set) | 0% | — |
| GSM8K | 82.4% | — |
Knowledge o3-pro leads
Gemini 1.5 Flash (May 2024): 26.2 (#260), o3-pro: 29.5 (#238)
| Benchmark | Gemini 1.5 Flash (May 2024) | o3-pro |
|---|---|---|
| GPQA Diamond | 47.3% | — |
| MMLU-Pro | 67.8% | — |
| Confabulations | — | 14.2% |
| Vectara Hallucination Rate | — | 23.3% |
| GPQA (HELM) | 43.7% | — |
| LMArena Expert | 1233 | — |
| BoolQ | 85.8% | — |
| MMLU | 77.9% | — |
Multimodal Not comparable
Gemini 1.5 Flash (May 2024): 36.0 (#81), o3-pro: —
| Benchmark | Gemini 1.5 Flash (May 2024) | o3-pro |
|---|---|---|
| LMArena Vision | 1141 | — |
| Video-MME | 70.3% | — |
| GeoBench | 76% | — |
Multilingual Not comparable
Gemini 1.5 Flash (May 2024): 42.9 (#189), o3-pro: —
| Benchmark | Gemini 1.5 Flash (May 2024) | o3-pro |
|---|---|---|
| LMArena Non-English | 1278 | — |
| LMArena Chinese | 1295 | — |
| LMArena French | 1258 | — |
| LMArena German | 1262 | — |
| LMArena Japanese | 1252 | — |
| LMArena Korean | 1221 | — |
| LMArena Russian | 1288 | — |
| LMArena Spanish | 1243 | — |
Instruction Following Not comparable
Gemini 1.5 Flash (May 2024): 66.8 (#205), o3-pro: —
| Benchmark | Gemini 1.5 Flash (May 2024) | o3-pro |
|---|---|---|
| IFEval | 83.1% | — |
| LMArena Instruction Following | 1258 | — |
Long Context o3-pro leads
Gemini 1.5 Flash (May 2024): 39.0 (#187), o3-pro: 72.2 (#1)
| Benchmark | Gemini 1.5 Flash (May 2024) | o3-pro |
|---|---|---|
| Fiction.LiveBench | — | 97.2% |
| LMArena Longer Query | 1284 | — |
Writing & Preference o3-pro leads
Gemini 1.5 Flash (May 2024): 48.7 (#196), o3-pro: 57.1 (#133)
| Benchmark | Gemini 1.5 Flash (May 2024) | o3-pro |
|---|---|---|
| LMArena Text | 1287 | — |
| LMArena Creative Writing | 1285 | — |
| Short-Story Creative Writing | — | 84.4% |
| WildBench | 79.2% | — |
| LMArena Multi-Turn | 1253 | — |
Frequently asked questions
Is Gemini 1.5 Flash (May 2024) better than o3-pro?
o3-pro is the stronger model overall, scoring 42.9 to 33.2 on the Noometry Index.
Is Gemini 1.5 Flash (May 2024) or o3-pro better for coding?
o3-pro scores higher on coding benchmarks: 55.5 versus 34.4 in the Noometry coding category.
How many benchmarks do Gemini 1.5 Flash (May 2024) and o3-pro share?
3 benchmarks have published results for both models. Gemini 1.5 Flash (May 2024) has 42 scored results on Noometry and o3-pro has 12.