Model comparison
Gemini 3.5 Flash vs Phi-1.5
Gemini 3.5 Flash has enough public results to be ranked (#29); Phi-1.5 does not yet, so treat this comparison as directional.
Last verified . 1 shared benchmarks.
Google
MicrosoftSummary
- They share 1 benchmark with published results for both.
- Phi-1.5 has downloadable open weights; the other is API-only.
Side by side
| Gemini 3.5 Flash | Phi-1.5 | |
|---|---|---|
| Provider | Microsoft | |
| Noometry Index | 54.1 | — |
| Released | 2026-05-19 | 2023-09-11 |
| Weights | Proprietary | Open |
| Context window | 1.05M | — |
| Max output | 66K | — |
| Input $ / M tokens | $1.50 | — |
| Output $ / M tokens | $9 | — |
| Results tracked | 54 | 7 |
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Category by category
Coding Not comparable
Gemini 3.5 Flash: 49.1 (#46), Phi-1.5: —
| Benchmark | Gemini 3.5 Flash | Phi-1.5 |
|---|---|---|
| SWE-bench Verified | 79.3% | — |
| DeepSWE | 37.4% | — |
| LMArena WebDev | 1499 | — |
| SciCode | 53.1% | — |
| WeirdML | 62.6% | — |
| LMArena Coding | 1492 | — |
| ALE-Bench | 911.02 | — |
Agentic & Tool Use Not comparable
Gemini 3.5 Flash: 24.8 (#107), Phi-1.5: —
| Benchmark | Gemini 3.5 Flash | Phi-1.5 |
|---|---|---|
| APEX-Agents | 27.5% | — |
| GBAEval | 6.7% | — |
| GDP.pdf | 14% | — |
| Vending-Bench 2 | 5,396 | — |
Reasoning Not comparable
Gemini 3.5 Flash: 62.7 (#16), Phi-1.5: —
| Benchmark | Gemini 3.5 Flash | Phi-1.5 |
|---|---|---|
| Epoch Capabilities Index | 154.55 | 90.82 |
| ARC-AGI-2 | 72.1% | — |
| SimpleBench | 76.7% | — |
| NYT Connections (extended) | 92.6% | — |
| ARC-AGI-1 | 92.5% | — |
| CritPt | 13.1% | — |
| Chess Puzzles | 50% | — |
| EnigmaEval | 25.4% | — |
| EBR-Bench | 4.8% | — |
| LMArena Hard Prompts | 1488 | — |
| Mystery Game Puzzles | 32% | — |
| DTBench | 94.7% | — |
| LMCA | 47.1% | — |
| Surface Evolver Bench | 58.1% | — |
| ForecastBench | 59 | — |
| HellaSwag | — | 47.6% |
| WinoGrande | — | 73.4% |
Math Not comparable
Gemini 3.5 Flash: 60.5 (#30), Phi-1.5: —
| Benchmark | Gemini 3.5 Flash | Phi-1.5 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 62.8% | — |
| FrontierMath Tier 4 | 26.8% | — |
| MathArena Final-Answer Competitions | 76.3% | — |
| OTIS Mock AIME 2024-2025 | 95.6% | — |
| ProofBench | 31% | — |
| LMArena Math | 1502 | — |
| FrontierMath (Feb 2025 set) | 39% | — |
| FrontierMath Tier 4 (v1) | 14.6% | — |
Knowledge Not comparable
Gemini 3.5 Flash: 66.3 (#10), Phi-1.5: —
| Benchmark | Gemini 3.5 Flash | Phi-1.5 |
|---|---|---|
| GPQA Diamond | 92.8% | — |
| SimpleQA Verified | 66.2% | — |
| LMArena Expert | 1493 | — |
| ARC (AI2) Challenge | — | 44.4% |
| BoolQ | — | 75.8% |
| MMLU | — | 37.6% |
| OpenBookQA | — | 37.2% |
Multimodal Not comparable
Gemini 3.5 Flash: 45.7 (#13), Phi-1.5: —
| Benchmark | Gemini 3.5 Flash | Phi-1.5 |
|---|---|---|
| LMArena Vision | 1311 | — |
| Blueprint-Bench 2 | 33.6% | — |
| LMArena Document | 1463 | — |
Multilingual Not comparable
Gemini 3.5 Flash: 57.1 (#12), Phi-1.5: —
| Benchmark | Gemini 3.5 Flash | Phi-1.5 |
|---|---|---|
| LMArena Non-English | 1475 | — |
| LMArena Chinese | 1525 | — |
| LMArena French | 1490 | — |
| LMArena German | 1500 | — |
| LMArena Japanese | 1481 | — |
| LMArena Korean | 1453 | — |
| LMArena Russian | 1491 | — |
| LMArena Spanish | 1478 | — |
Instruction Following Not comparable
Gemini 3.5 Flash: 77.2 (#29), Phi-1.5: —
| Benchmark | Gemini 3.5 Flash | Phi-1.5 |
|---|---|---|
| LMArena Instruction Following | 1466 | — |
Long Context Not comparable
Gemini 3.5 Flash: 45.3 (#39), Phi-1.5: —
| Benchmark | Gemini 3.5 Flash | Phi-1.5 |
|---|---|---|
| LMArena Longer Query | 1481 | — |
Writing & Preference Not comparable
Gemini 3.5 Flash: 65.5 (#46), Phi-1.5: —
| Benchmark | Gemini 3.5 Flash | Phi-1.5 |
|---|---|---|
| LMArena Text | 1481 | — |
| LMArena Creative Writing | 1467 | — |
| EQ-Bench 4 | 1087 | — |
| LMArena Multi-Turn | 1482 | — |
Frequently asked questions
Is Gemini 3.5 Flash better than Phi-1.5?
Gemini 3.5 Flash has enough public results to be ranked (#29); Phi-1.5 does not yet, so treat this comparison as directional.
How many benchmarks do Gemini 3.5 Flash and Phi-1.5 share?
1 benchmark has published results for both models. Gemini 3.5 Flash has 54 scored results on Noometry and Phi-1.5 has 7.