Model comparison
Gemini 3.1 Pro Preview vs GPT-4.5
Gemini 3.1 Pro Preview is the stronger model overall, scoring 56.7 to 37.2 on the Noometry Index.
Last verified . 28 shared benchmarks.
GoogleSummary
- They share 28 benchmarks with published results for both. Gemini 3.1 Pro Preview scores higher in 10 categories and GPT-4.5 in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Gemini 3.1 Pro Preview leads 71.7 to 13.9.
- The biggest single-benchmark swing is ARC-AGI-1: 98% for Gemini 3.1 Pro Preview and 10.3% for GPT-4.5.
Side by side
| Gemini 3.1 Pro Preview | GPT-4.5 | |
|---|---|---|
| Provider | OpenAI | |
| Noometry Index | 56.7 | 37.2 |
| Released | 2026-02-19 | 2025-02-27 |
| Weights | Proprietary | Proprietary |
| Context window | 1.05M | — |
| Max output | 66K | — |
| Input $ / M tokens | $2 | — |
| Output $ / M tokens | $12 | — |
| Results tracked | 71 | 42 |
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Category by category
Coding Too close to call
Gemini 3.1 Pro Preview: 42.5 (#99), GPT-4.5: 42.2 (#109)
| Benchmark | Gemini 3.1 Pro Preview | GPT-4.5 |
|---|---|---|
| WeirdML | 72.1% | 39.4% |
| LMArena Coding | 1484 | 1396 |
| SWE-bench Verified | 75.6% | — |
| DeepSWE | 11.7% | — |
| Aider Polyglot | — | 44.9% |
| LMArena WebDev | 1447 | — |
| SciCode | 58.9% | — |
| GSO | 22.6% | — |
| LiveBench Coding | — | 75.2% |
| MirrorCode | 8.9% | — |
| ALE-Bench | 1,161 | — |
| AlgoTune | 2.02 | — |
Agentic & Tool Use Gemini 3.1 Pro Preview leads
Gemini 3.1 Pro Preview: 37.7 (#34), GPT-4.5: 27.9 (#97)
| Benchmark | Gemini 3.1 Pro Preview | GPT-4.5 |
|---|---|---|
| Terminal-Bench | 80.2% | — |
| APEX-Agents | 35.3% | — |
| τ²-bench Banking | 26% | — |
| Cybench | — | 17.5% |
| DeepResearch Bench | 47.8% | — |
| PostTrainBench | 22% | — |
| BALROG | 57% | — |
| 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 3.1 Pro Preview: 71.7 (#12), GPT-4.5: 13.9 (#330)
| Benchmark | Gemini 3.1 Pro Preview | GPT-4.5 |
|---|---|---|
| ARC-AGI-2 | 77.1% | 0.8% |
| SimpleBench | 79.6% | 34.5% |
| ARC-AGI-1 | 98% | 10.3% |
| EnigmaEval | 36.8% | 3.2% |
| LMArena Hard Prompts | 1485 | 1403 |
| Epoch Capabilities Index | 154.77 | 136.74 |
| ForecastBench | 59 | 61.7 |
| NYT Connections (extended) | 97.4% | — |
| CritPt | 17.7% | — |
| Chess Puzzles | 55% | — |
| Thematic Generalization | 79.4% | — |
| EBR-Bench | 14.3% | — |
| LiveBench Reasoning | — | 71.1% |
| Mystery Game Puzzles | 34% | — |
| DTBench | 97.1% | — |
| LiveBench Data Analysis | — | 64.3% |
| LMCA | 53.8% | — |
| LiveBench | — | 69% |
Math Gemini 3.1 Pro Preview leads
Gemini 3.1 Pro Preview: 62.1 (#34), GPT-4.5: 32.6 (#211)
| Benchmark | Gemini 3.1 Pro Preview | GPT-4.5 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 95.6% | 37.8% |
| LMArena Math | 1485 | 1412 |
| FrontierMath (Tiers 1-3) | 59.6% | — |
| FrontierMath Tier 4 | 26.8% | — |
| MathArena Final-Answer Competitions | 86.5% | — |
| ProofBench | 26% | — |
| LiveBench Math | — | 69.3% |
| MATH Level 5 | — | 78.6% |
| FrontierMath (Feb 2025 set) | 36.9% | — |
| FrontierMath Tier 4 (v1) | 16.7% | — |
Knowledge Gemini 3.1 Pro Preview leads
Gemini 3.1 Pro Preview: 71.8 (#3), GPT-4.5: 32.5 (#211)
| Benchmark | Gemini 3.1 Pro Preview | GPT-4.5 |
|---|---|---|
| GPQA Diamond | 94.4% | 68.7% |
| Humanity's Last Exam | 46.4% | 5.4% |
| LMArena Expert | 1485 | 1394 |
| SimpleQA Verified | 73.5% | — |
| Confabulations | — | 13.6% |
| Vectara Hallucination Rate | 10.4% | — |
Multimodal Too close to call
Gemini 3.1 Pro Preview: 37.9 (#69), GPT-4.5: 37.6 (#71)
| Benchmark | Gemini 3.1 Pro Preview | GPT-4.5 |
|---|---|---|
| LMArena Vision | 1296 | 1195 |
| VPCT | — | 45% |
| Blueprint-Bench 2 | 26.5% | — |
| Furniture Assembly | 26.7% | — |
| LMArena Document | 1444 | — |
Multilingual Gemini 3.1 Pro Preview leads
Gemini 3.1 Pro Preview: 57.0 (#12), GPT-4.5: 52.5 (#83)
| Benchmark | Gemini 3.1 Pro Preview | GPT-4.5 |
|---|---|---|
| LMArena Non-English | 1477 | 1413 |
| LMArena Chinese | 1529 | 1421 |
| LMArena French | 1487 | 1418 |
| LMArena German | 1491 | 1457 |
| LMArena Japanese | 1493 | 1416 |
| LMArena Korean | 1455 | 1392 |
| LMArena Russian | 1498 | 1419 |
| LMArena Spanish | 1479 | — |
Instruction Following Gemini 3.1 Pro Preview leads
Gemini 3.1 Pro Preview: 77.0 (#32), GPT-4.5: 72.6 (#134)
| Benchmark | Gemini 3.1 Pro Preview | GPT-4.5 |
|---|---|---|
| LMArena Instruction Following | 1466 | 1404 |
| LiveBench Instruction Following | — | 72.3% |
Long Context Gemini 3.1 Pro Preview leads
Gemini 3.1 Pro Preview: 47.4 (#18), GPT-4.5: 40.4 (#155)
| Benchmark | Gemini 3.1 Pro Preview | GPT-4.5 |
|---|---|---|
| LMArena Longer Query | 1483 | 1406 |
| Fiction.LiveBench | — | 63.9% |
| CL-bench | 20.8% | — |
| CL-bench Life | 16.9% | — |
Writing & Preference Gemini 3.1 Pro Preview leads
Gemini 3.1 Pro Preview: 66.1 (#37), GPT-4.5: 56.9 (#134)
| Benchmark | Gemini 3.1 Pro Preview | GPT-4.5 |
|---|---|---|
| LMArena Text | 1481 | 1417 |
| LMArena Creative Writing | 1482 | 1394 |
| EQ-Bench Creative Writing | 1491 | 1258 |
| LMArena Multi-Turn | 1488 | 1444 |
| Short-Story Creative Writing | — | 75.6% |
| EQ-Bench 4 | 1142 | — |
| LiveBench Language | — | 61.5% |
Frequently asked questions
Is Gemini 3.1 Pro Preview better than GPT-4.5?
Gemini 3.1 Pro Preview is the stronger model overall, scoring 56.7 to 37.2 on the Noometry Index.
Is Gemini 3.1 Pro Preview or GPT-4.5 better for coding?
They score almost the same on coding (42.5 vs 42.2); test both on your own repository before choosing.
How many benchmarks do Gemini 3.1 Pro Preview and GPT-4.5 share?
28 benchmarks have published results for both models. Gemini 3.1 Pro Preview has 71 scored results on Noometry and GPT-4.5 has 42.