Model comparison
Gemini 2.5 Flash vs o1-mini
Gemini 2.5 Flash is the stronger model overall, scoring 39.3 to 34.0 on the Noometry Index.
Last verified . 27 shared benchmarks.
GoogleSummary
- They share 27 benchmarks with published results for both. Gemini 2.5 Flash scores higher in 9 categories and o1-mini in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Gemini 2.5 Flash leads 18.1 to 8.8.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 73.1% for Gemini 2.5 Flash and 46.9% for o1-mini.
Side by side
| Gemini 2.5 Flash | o1-mini | |
|---|---|---|
| Provider | OpenAI | |
| Noometry Index | 39.3 | 34.0 |
| Released | 2025-04-17 | 2024-09-12 |
| Weights | Proprietary | Proprietary |
| Context window | 1.05M | — |
| Max output | 66K | — |
| Input $ / M tokens | $0.30 | — |
| Output $ / M tokens | $2.50 | — |
| Results tracked | 54 | 39 |
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Category by category
Coding Too close to call
Gemini 2.5 Flash: 35.8 (#220), o1-mini: 35.5 (#224)
| Benchmark | Gemini 2.5 Flash | o1-mini |
|---|---|---|
| Aider Polyglot | 55.1% | 32.9% |
| WeirdML | 41.9% | 36.3% |
| LMArena Coding | 1424 | 1362 |
| SWE-bench Verified (bash only) | 28.7% | — |
| LiveBench Coding | — | 48% |
| ALE-Bench | 661.88 | — |
| HumanEval+ | — | 89% |
| MBPP+ | — | 78.8% |
Agentic & Tool Use Gemini 2.5 Flash leads
Gemini 2.5 Flash: 30.8 (#74), o1-mini: 24.6 (#118)
| Benchmark | Gemini 2.5 Flash | o1-mini |
|---|---|---|
| Terminal-Bench | 17.1% | — |
| Berkeley Function Calling Leaderboard | 56.2% | — |
| TheAgentCompany | 41.1% | — |
| Cybench | — | 10% |
| BALROG | 33.5% | — |
| Vending-Bench 2 | 548.84 | — |
Reasoning Gemini 2.5 Flash leads
Gemini 2.5 Flash: 18.1 (#286), o1-mini: 8.8 (#346)
| Benchmark | Gemini 2.5 Flash | o1-mini |
|---|---|---|
| ARC-AGI-2 | 2.5% | 0.8% |
| SimpleBench | 41.2% | 18.1% |
| ARC-AGI-1 | 33.3% | 14% |
| LMArena Hard Prompts | 1422 | 1333 |
| Epoch Capabilities Index | 143.03 | 135.82 |
| Kagi LLM Benchmark | 56.8% | — |
| CritPt | 1.1% | — |
| EnigmaEval | 2.7% | — |
| LiveBench Reasoning | — | 72.3% |
| DTBench | 76.5% | — |
| LiveBench Data Analysis | — | 57.9% |
| LMCA | 27.5% | — |
| ForecastBench | 60.6 | — |
| LiveBench | — | 57.8% |
Math Gemini 2.5 Flash leads
Gemini 2.5 Flash: 39.9 (#98), o1-mini: 35.4 (#186)
| Benchmark | Gemini 2.5 Flash | o1-mini |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 73.1% | 46.9% |
| LMArena Math | 1415 | 1358 |
| FrontierMath (Feb 2025 set) | 4.8% | 1.7% |
| Omni-MATH | 38.5% | — |
| LiveBench Math | — | 62% |
| MATH Level 5 | — | 89.2% |
| FrontierMath Tier 4 (v1) | 4.2% | — |
Knowledge Gemini 2.5 Flash leads
Gemini 2.5 Flash: 36.4 (#168), o1-mini: 34.9 (#192)
| Benchmark | Gemini 2.5 Flash | o1-mini |
|---|---|---|
| Confabulations | 16.8% | 18.6% |
| LMArena Expert | 1426 | 1316 |
| GPQA Diamond | — | 62.4% |
| Humanity's Last Exam | 12.1% | — |
| MMLU-Pro | 63.9% | — |
| Vectara Hallucination Rate | 7.8% | — |
| GPQA (HELM) | 39% | — |
Multimodal Not comparable
Gemini 2.5 Flash: 41.8 (#32), o1-mini: —
| Benchmark | Gemini 2.5 Flash | o1-mini |
|---|---|---|
| LMArena Vision | 1253 | — |
| GeoBench | 76% | — |
| VPCT | 46.2% | — |
| SpatialViz-Bench | 36.9% | — |
Multilingual Gemini 2.5 Flash leads
Gemini 2.5 Flash: 52.3 (#88), o1-mini: 43.6 (#182)
| Benchmark | Gemini 2.5 Flash | o1-mini |
|---|---|---|
| LMArena Non-English | 1409 | 1289 |
| LMArena Chinese | 1450 | 1314 |
| LMArena French | 1433 | 1293 |
| LMArena German | 1418 | 1278 |
| LMArena Japanese | 1405 | 1245 |
| LMArena Korean | 1385 | 1223 |
| LMArena Russian | 1415 | 1283 |
| LMArena Spanish | 1421 | 1303 |
Instruction Following Gemini 2.5 Flash leads
Gemini 2.5 Flash: 75.7 (#54), o1-mini: 66.7 (#206)
| Benchmark | Gemini 2.5 Flash | o1-mini |
|---|---|---|
| LMArena Instruction Following | 1405 | 1304 |
| LiveBench Instruction Following | — | 65.4% |
| IFEval | 89.8% | — |
Long Context Gemini 2.5 Flash leads
Gemini 2.5 Flash: 47.5 (#17), o1-mini: 40.1 (#161)
| Benchmark | Gemini 2.5 Flash | o1-mini |
|---|---|---|
| LMArena Longer Query | 1419 | 1320 |
| Fiction.LiveBench | 77.8% | — |
Writing & Preference Gemini 2.5 Flash leads
Gemini 2.5 Flash: 53.8 (#157), o1-mini: 48.4 (#202)
| Benchmark | Gemini 2.5 Flash | o1-mini |
|---|---|---|
| LMArena Text | 1417 | 1317 |
| LMArena Creative Writing | 1400 | 1244 |
| Short-Story Creative Writing | 76.5% | 64.9% |
| LMArena Multi-Turn | 1408 | 1314 |
| EQ-Bench Creative Writing | 1137 | — |
| WildBench | 81.7% | — |
| LiveBench Language | — | 40.9% |
Frequently asked questions
Is Gemini 2.5 Flash better than o1-mini?
Gemini 2.5 Flash is the stronger model overall, scoring 39.3 to 34.0 on the Noometry Index.
Is Gemini 2.5 Flash or o1-mini better for coding?
They score almost the same on coding (35.8 vs 35.5); test both on your own repository before choosing.
How many benchmarks do Gemini 2.5 Flash and o1-mini share?
27 benchmarks have published results for both models. Gemini 2.5 Flash has 54 scored results on Noometry and o1-mini has 39.