# Gemini 3.1 Pro Preview vs Gemini 3 Pro

> Gemini 3.1 Pro Preview is the stronger model overall, scoring 56.7 to 54.8 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gemini-3-1-pro-preview-vs-gemini-3-pro
- Last updated: 2026-10-12
- Shared benchmarks: 51

## Summary

- They share 51 benchmarks with published results for both. Gemini 3.1 Pro Preview scores higher in 6 categories and Gemini 3 Pro in 4 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in multimodal, where Gemini 3 Pro leads 57.6 to 37.9.
- The biggest single-benchmark swing is ARC-AGI-2: 77.1% for Gemini 3.1 Pro Preview and 31.1% for Gemini 3 Pro.

## Snapshot

| | Gemini 3.1 Pro Preview | Gemini 3 Pro |
|---|---|---|
| Provider | Google | Google |
| Noometry Index | 56.7 | 54.8 |
| Rank | 23 | 28 |
| Context | 1.05M | — |
| Input $/M | $2 | — |
| Output $/M | $12 | — |
| Weights | Proprietary | Proprietary |

## Coding

- Gemini 3.1 Pro Preview: 42.5 (#99)
- Gemini 3 Pro: 51.6 (#39)

| Benchmark | Gemini 3.1 Pro Preview | Gemini 3 Pro |
|---|---|---|
| SWE-bench Verified | 75.6% | 72.9% |
| LMArena WebDev | 1447 | 1440 |
| GSO | 22.6% | 18.6% |
| WeirdML | 72.1% | 69.9% |
| LMArena Coding | 1484 | 1481 |
| ALE-Bench | 1,161 | 1,177 |
| AlgoTune | 2.02 | 1.83 |
| DeepSWE | 11.7% | — |
| SWE-bench Verified (bash only) | — | 74.2% |
| SWE-bench Multilingual | — | 68.7% |
| SciCode | 58.9% | — |
| MirrorCode | 8.9% | — |

## Agentic & Tool Use

- Gemini 3.1 Pro Preview: 37.7 (#34)
- Gemini 3 Pro: 40.6 (#23)

| Benchmark | Gemini 3.1 Pro Preview | Gemini 3 Pro |
|---|---|---|
| Terminal-Bench | 80.2% | 69.4% |
| τ²-bench Banking | 26% | 18% |
| DeepResearch Bench | 47.8% | 46.3% |
| BALROG | 57% | 58.1% |
| LMArena Search | 1211 | 1207 |
| METR Time Horizons | 77% | 71% |
| Vending-Bench 2 | 3,774 | 5,478 |
| APEX-Agents | 35.3% | — |
| Berkeley Function Calling Leaderboard | — | 72.5% |
| GDPval | — | 40.3% |
| Remote Labor Index | — | 1.3% |
| τ²-bench Airline | — | 80.5% |
| τ²-bench Retail | — | 75.9% |
| τ²-bench Telecom | — | 91% |
| PostTrainBench | 22% | — |
| ExploitBench | 26.1% | — |
| GBAEval | 0.8% | — |
| GDP.pdf | 17% | — |

## Reasoning

- Gemini 3.1 Pro Preview: 71.7 (#12)
- Gemini 3 Pro: 52.5 (#31)

| Benchmark | Gemini 3.1 Pro Preview | Gemini 3 Pro |
|---|---|---|
| ARC-AGI-2 | 77.1% | 31.1% |
| SimpleBench | 79.6% | 76.4% |
| NYT Connections (extended) | 97.4% | 94.4% |
| ARC-AGI-1 | 98% | 75% |
| CritPt | 17.7% | 6.9% |
| Chess Puzzles | 55% | 31% |
| EnigmaEval | 36.8% | 18.2% |
| LMArena Hard Prompts | 1485 | 1480 |
| Epoch Capabilities Index | 154.77 | 152.92 |
| ForecastBench | 59 | 61.2 |
| Kagi LLM Benchmark | — | 80.1% |
| Thematic Generalization | 79.4% | — |
| EBR-Bench | 14.3% | — |
| Mystery Game Puzzles | 34% | — |
| DTBench | 97.1% | — |
| LMCA | 53.8% | — |

## Math

- Gemini 3.1 Pro Preview: 62.1 (#34)
- Gemini 3 Pro: 49.9 (#59)

| Benchmark | Gemini 3.1 Pro Preview | Gemini 3 Pro |
|---|---|---|
| MathArena Final-Answer Competitions | 86.5% | 67% |
| OTIS Mock AIME 2024-2025 | 95.6% | 91.4% |
| ProofBench | 26% | 20% |
| LMArena Math | 1485 | 1476 |
| FrontierMath (Feb 2025 set) | 36.9% | 37.6% |
| FrontierMath Tier 4 (v1) | 16.7% | 18.8% |
| FrontierMath (Tiers 1-3) | 59.6% | — |
| FrontierMath Tier 4 | 26.8% | — |
| Omni-MATH | — | 55.5% |

## Knowledge

- Gemini 3.1 Pro Preview: 71.8 (#3)
- Gemini 3 Pro: 64.4 (#16)

| Benchmark | Gemini 3.1 Pro Preview | Gemini 3 Pro |
|---|---|---|
| GPQA Diamond | 94.4% | 92.6% |
| Humanity's Last Exam | 46.4% | 37.5% |
| Vectara Hallucination Rate | 10.4% | 13.6% |
| LMArena Expert | 1485 | 1475 |
| SimpleQA Verified | 73.5% | — |
| MMLU-Pro | — | 90.3% |
| GPQA (HELM) | — | 80.3% |

## Multimodal

- Gemini 3.1 Pro Preview: 37.9 (#69)
- Gemini 3 Pro: 57.6 (#2)

| Benchmark | Gemini 3.1 Pro Preview | Gemini 3 Pro |
|---|---|---|
| LMArena Vision | 1296 | 1305 |
| LMArena Document | 1444 | 1434 |
| GeoBench | — | 84% |
| VPCT | — | 91% |
| Blueprint-Bench 2 | 26.5% | — |
| Furniture Assembly | 26.7% | — |

## Multilingual

- Gemini 3.1 Pro Preview: 57.0 (#12)
- Gemini 3 Pro: 56.9 (#16)

| Benchmark | Gemini 3.1 Pro Preview | Gemini 3 Pro |
|---|---|---|
| LMArena Non-English | 1477 | 1474 |
| LMArena Chinese | 1529 | 1523 |
| LMArena French | 1487 | 1492 |
| LMArena German | 1491 | 1515 |
| LMArena Japanese | 1493 | 1510 |
| LMArena Korean | 1455 | 1448 |
| LMArena Russian | 1498 | 1493 |
| LMArena Spanish | 1479 | 1470 |

## Instruction Following

- Gemini 3.1 Pro Preview: 77.0 (#32)
- Gemini 3 Pro: 76.3 (#45)

| Benchmark | Gemini 3.1 Pro Preview | Gemini 3 Pro |
|---|---|---|
| LMArena Instruction Following | 1466 | 1458 |
| IFEval | — | 87.7% |

## Long Context

- Gemini 3.1 Pro Preview: 47.4 (#18)
- Gemini 3 Pro: 44.0 (#79)

| Benchmark | Gemini 3.1 Pro Preview | Gemini 3 Pro |
|---|---|---|
| CL-bench | 20.8% | 15.8% |
| LMArena Longer Query | 1483 | 1471 |
| CL-bench Life | 16.9% | — |

## Writing & Preference

- Gemini 3.1 Pro Preview: 66.1 (#37)
- Gemini 3 Pro: 66.4 (#35)

| Benchmark | Gemini 3.1 Pro Preview | Gemini 3 Pro |
|---|---|---|
| LMArena Text | 1481 | 1479 |
| LMArena Creative Writing | 1482 | 1482 |
| EQ-Bench Creative Writing | 1491 | 1525 |
| LMArena Multi-Turn | 1488 | 1484 |
| WildBench | — | 85.9% |
| EQ-Bench 4 | 1142 | — |

## FAQ

### Is Gemini 3.1 Pro Preview better than Gemini 3 Pro?

Gemini 3.1 Pro Preview is the stronger model overall, scoring 56.7 to 54.8 on the Noometry Index.

### Is Gemini 3.1 Pro Preview or Gemini 3 Pro better for coding?

Gemini 3 Pro scores higher on coding benchmarks: 51.6 versus 42.5 in the Noometry coding category.

### How many benchmarks do Gemini 3.1 Pro Preview and Gemini 3 Pro share?

51 benchmarks have published results for both models. Gemini 3.1 Pro Preview has 71 scored results on Noometry and Gemini 3 Pro has 67.