Model comparison
Gemini 1.5 Flash (May 2024) vs Gemini 3.1 Pro Preview
Gemini 3.1 Pro Preview is the stronger model overall, scoring 56.7 to 32.9 on the Noometry Index.
Last verified . 26 shared benchmarks.
GoogleSummary
- They share 26 benchmarks with published results for both. Gemini 1.5 Flash (May 2024) scores higher in 0 categories and Gemini 3.1 Pro Preview in 10 categories; 10 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Gemini 3.1 Pro Preview leads 71.7 to 20.8.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 16.3% for Gemini 1.5 Flash (May 2024) and 95.6% for Gemini 3.1 Pro Preview.
Side by side
| Gemini 1.5 Flash (May 2024) | Gemini 3.1 Pro Preview | |
|---|---|---|
| Provider | ||
| Noometry Index | 32.9 | 56.7 |
| Released | 2024-05-14 | 2026-02-19 |
| Weights | Proprietary | Proprietary |
| Context window | — | 1.05M |
| Max output | — | 66K |
| Input $ / M tokens | — | $2 |
| Output $ / M tokens | — | $12 |
| Results tracked | 42 | 71 |
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Category by category
Coding Gemini 3.1 Pro Preview leads
Gemini 1.5 Flash (May 2024): 33.9 (#233), Gemini 3.1 Pro Preview: 42.7 (#88)
| Benchmark | Gemini 1.5 Flash (May 2024) | Gemini 3.1 Pro Preview |
|---|---|---|
| WeirdML | 24.9% | 72.1% |
| LMArena Coding | 1262 | 1483 |
| SWE-bench Verified | — | 75.6% |
| DeepSWE | — | 11.7% |
| LMArena WebDev | — | 1446 |
| SciCode | — | 58.9% |
| GSO | — | 22.6% |
| BigCodeBench Instruct | 43.5% | — |
| MirrorCode | — | 8.9% |
| BigCodeBench Complete | 55.1% | — |
| ALE-Bench | — | 1,161 |
| AlgoTune | — | 2.02 |
| HumanEval+ | 75.6% | — |
| MBPP+ | 67.5% | — |
Agentic & Tool Use Gemini 3.1 Pro Preview leads
Gemini 1.5 Flash (May 2024): 26.3 (#97), Gemini 3.1 Pro Preview: 37.7 (#33)
| Benchmark | Gemini 1.5 Flash (May 2024) | Gemini 3.1 Pro Preview |
|---|---|---|
| BALROG | 14.6% | 57% |
| Terminal-Bench | — | 80.2% |
| APEX-Agents | — | 35.3% |
| τ²-bench Banking | — | 26% |
| DeepResearch Bench | — | 47.8% |
| PostTrainBench | — | 22% |
| ExploitBench | — | 26.1% |
| GBAEval | — | 0.8% |
| GDP.pdf | — | 17% |
| LMArena Search | — | 1211 |
| METR Time Horizons | — | 77% |
| Vending-Bench 2 | — | 3,774 |
Reasoning Gemini 3.1 Pro Preview leads
Gemini 1.5 Flash (May 2024): 20.8 (#212), Gemini 3.1 Pro Preview: 71.7 (#9)
| Benchmark | Gemini 1.5 Flash (May 2024) | Gemini 3.1 Pro Preview |
|---|---|---|
| LMArena Hard Prompts | 1257 | 1484 |
| DTBench | 53.8% | 97.1% |
| Epoch Capabilities Index | 129.37 | 154.92 |
| ForecastBench | 53.9 | 59 |
| ARC-AGI-2 | — | 77.1% |
| SimpleBench | — | 79.6% |
| NYT Connections (extended) | — | 97.4% |
| ARC-AGI-1 | — | 98% |
| CritPt | — | 17.7% |
| Chess Puzzles | — | 55% |
| EnigmaEval | — | 36.8% |
| Thematic Generalization | — | 79.4% |
| EBR-Bench | — | 14.3% |
| Mystery Game Puzzles | — | 34% |
| LMCA | — | 53.8% |
| PIQA | 87.5% | — |
Math Gemini 3.1 Pro Preview leads
Gemini 1.5 Flash (May 2024): 20.8 (#274), Gemini 3.1 Pro Preview: 61.8 (#28)
| Benchmark | Gemini 1.5 Flash (May 2024) | Gemini 3.1 Pro Preview |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 16.3% | 95.6% |
| LMArena Math | 1269 | 1485 |
| FrontierMath (Feb 2025 set) | 0% | 36.9% |
| FrontierMath (Tiers 1-3) | — | 59.6% |
| FrontierMath Tier 4 | — | 26.8% |
| MathArena Final-Answer Competitions | — | 86.5% |
| ProofBench | — | 26% |
| Omni-MATH | 30.4% | — |
| MATH Level 5 | 61.9% | — |
| FrontierMath Tier 4 (v1) | — | 16.7% |
| GSM8K | 82.4% | — |
Knowledge Gemini 3.1 Pro Preview leads
Gemini 1.5 Flash (May 2024): 26.2 (#253), Gemini 3.1 Pro Preview: 71.8 (#3)
| Benchmark | Gemini 1.5 Flash (May 2024) | Gemini 3.1 Pro Preview |
|---|---|---|
| GPQA Diamond | 47.3% | 94.4% |
| LMArena Expert | 1233 | 1484 |
| Humanity's Last Exam | — | 46.4% |
| SimpleQA Verified | — | 73.5% |
| MMLU-Pro | 67.8% | — |
| Vectara Hallucination Rate | — | 10.4% |
| GPQA (HELM) | 43.7% | — |
| BoolQ | 85.8% | — |
| MMLU | 77.9% | — |
Multimodal Gemini 3.1 Pro Preview leads
Gemini 1.5 Flash (May 2024): 35.3 (#76), Gemini 3.1 Pro Preview: 38.1 (#60)
| Benchmark | Gemini 1.5 Flash (May 2024) | Gemini 3.1 Pro Preview |
|---|---|---|
| LMArena Vision | 1141 | 1296 |
| Video-MME | 70.3% | — |
| GeoBench | 76% | — |
| Blueprint-Bench 2 | — | 26.5% |
| Furniture Assembly | — | 26.7% |
| LMArena Document | — | 1444 |
Multilingual Gemini 3.1 Pro Preview leads
Gemini 1.5 Flash (May 2024): 43.1 (#184), Gemini 3.1 Pro Preview: 57.1 (#11)
| Benchmark | Gemini 1.5 Flash (May 2024) | Gemini 3.1 Pro Preview |
|---|---|---|
| LMArena Non-English | 1278 | 1475 |
| LMArena Chinese | 1295 | 1528 |
| LMArena French | 1257 | 1488 |
| LMArena German | 1262 | 1491 |
| LMArena Japanese | 1252 | 1494 |
| LMArena Korean | 1220 | 1458 |
| LMArena Russian | 1288 | 1496 |
| LMArena Spanish | 1242 | 1480 |
Instruction Following Gemini 3.1 Pro Preview leads
Gemini 1.5 Flash (May 2024): 67.0 (#199), Gemini 3.1 Pro Preview: 77.1 (#31)
| Benchmark | Gemini 1.5 Flash (May 2024) | Gemini 3.1 Pro Preview |
|---|---|---|
| LMArena Instruction Following | 1258 | 1465 |
| IFEval | 83.1% | — |
Long Context Gemini 3.1 Pro Preview leads
Gemini 1.5 Flash (May 2024): 39.0 (#182), Gemini 3.1 Pro Preview: 47.3 (#17)
| Benchmark | Gemini 1.5 Flash (May 2024) | Gemini 3.1 Pro Preview |
|---|---|---|
| LMArena Longer Query | 1284 | 1482 |
| CL-bench | — | 20.8% |
| CL-bench Life | — | 16.9% |
Writing & Preference Gemini 3.1 Pro Preview leads
Gemini 1.5 Flash (May 2024): 48.9 (#190), Gemini 3.1 Pro Preview: 66.3 (#36)
| Benchmark | Gemini 1.5 Flash (May 2024) | Gemini 3.1 Pro Preview |
|---|---|---|
| LMArena Text | 1287 | 1480 |
| LMArena Creative Writing | 1285 | 1482 |
| LMArena Multi-Turn | 1253 | 1486 |
| EQ-Bench Creative Writing | — | 1491 |
| WildBench | 79.2% | — |
| EQ-Bench 4 | — | 1142 |
Frequently asked questions
Is Gemini 1.5 Flash (May 2024) better than Gemini 3.1 Pro Preview?
Gemini 3.1 Pro Preview is the stronger model overall, scoring 56.7 to 32.9 on the Noometry Index.
Is Gemini 1.5 Flash (May 2024) or Gemini 3.1 Pro Preview better for coding?
Gemini 3.1 Pro Preview scores higher on coding benchmarks: 42.7 versus 33.9 in the Noometry coding category.
How many benchmarks do Gemini 1.5 Flash (May 2024) and Gemini 3.1 Pro Preview share?
26 benchmarks have published results for both models. Gemini 1.5 Flash (May 2024) has 42 scored results on Noometry and Gemini 3.1 Pro Preview has 71.