# Gemini 3.1 Pro Preview vs Mixtral 8x7B

> Gemini 3.1 Pro Preview is the stronger model overall, scoring 56.7 to 27.1 on the Noometry Index. Mixtral 8x7B costs 6.4× less per token, which makes it the better buy when Gemini 3.1 Pro Preview's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/gemini-3-1-pro-preview-vs-mixtral-8x7b
- Last updated: 2026-10-12
- Shared benchmarks: 21

## Summary

- They share 21 benchmarks with published results for both. Gemini 3.1 Pro Preview scores higher in 8 categories and Mixtral 8x7B in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Gemini 3.1 Pro Preview leads 71.8 to 11.0.
- The biggest single-benchmark swing is GPQA Diamond: 94.4% for Gemini 3.1 Pro Preview and 30.6% for Mixtral 8x7B.
- Mixtral 8x7B is cheaper at $0.70 / $0.70 per million input/output tokens, against $2 / $12 for Gemini 3.1 Pro Preview.
- Gemini 3.1 Pro Preview accepts more context: 1.05M tokens versus 32K.
- Mixtral 8x7B has downloadable open weights; the other is API-only.

## Snapshot

| | Gemini 3.1 Pro Preview | Mixtral 8x7B |
|---|---|---|
| Provider | Google | Mistral AI |
| Noometry Index | 56.7 | 27.1 |
| Rank | 23 | 334 |
| Context | 1.05M | 32K |
| Input $/M | $2 | $0.70 |
| Output $/M | $12 | $0.70 |
| Weights | Proprietary | Open |

## Coding

- Gemini 3.1 Pro Preview: 42.5 (#99)
- Mixtral 8x7B: 32.8 (#269)

| Benchmark | Gemini 3.1 Pro Preview | Mixtral 8x7B |
|---|---|---|
| LMArena Coding | 1484 | 1126 |
| SWE-bench Verified | 75.6% | — |
| DeepSWE | 11.7% | — |
| LMArena WebDev | 1447 | — |
| SciCode | 58.9% | — |
| GSO | 22.6% | — |
| WeirdML | 72.1% | — |
| MirrorCode | 8.9% | — |
| ALE-Bench | 1,161 | — |
| AlgoTune | 2.02 | — |
| HumanEval+ | — | 39.6% |
| MBPP+ | — | 49.7% |

## Agentic & Tool Use

- Gemini 3.1 Pro Preview: 37.7 (#34)
- Mixtral 8x7B: —

| Benchmark | Gemini 3.1 Pro Preview | Mixtral 8x7B |
|---|---|---|
| Terminal-Bench | 80.2% | — |
| APEX-Agents | 35.3% | — |
| τ²-bench Banking | 26% | — |
| 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: 71.7 (#12)
- Mixtral 8x7B: 18.2 (#285)

| Benchmark | Gemini 3.1 Pro Preview | Mixtral 8x7B |
|---|---|---|
| LMArena Hard Prompts | 1485 | 1115 |
| DTBench | 97.1% | 49.6% |
| Epoch Capabilities Index | 154.77 | 118.47 |
| ForecastBench | 59 | 56.3 |
| 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% | — |
| Adversarial NLI | — | 55.2% |
| HellaSwag | — | 86.7% |
| PIQA | — | 83.6% |
| WinoGrande | — | 77.2% |

## Math

- Gemini 3.1 Pro Preview: 62.1 (#34)
- Mixtral 8x7B: 18.8 (#289)

| Benchmark | Gemini 3.1 Pro Preview | Mixtral 8x7B |
|---|---|---|
| LMArena Math | 1485 | 1147 |
| FrontierMath (Tiers 1-3) | 59.6% | — |
| FrontierMath Tier 4 | 26.8% | — |
| MathArena Final-Answer Competitions | 86.5% | — |
| OTIS Mock AIME 2024-2025 | 95.6% | — |
| ProofBench | 26% | — |
| Omni-MATH | — | 10.5% |
| MATH Level 5 | — | 10% |
| FrontierMath (Feb 2025 set) | 36.9% | — |
| FrontierMath Tier 4 (v1) | 16.7% | — |
| GSM8K | — | 74.4% |

## Knowledge

- Gemini 3.1 Pro Preview: 71.8 (#3)
- Mixtral 8x7B: 11.0 (#301)

| Benchmark | Gemini 3.1 Pro Preview | Mixtral 8x7B |
|---|---|---|
| GPQA Diamond | 94.4% | 30.6% |
| LMArena Expert | 1485 | 1088 |
| Humanity's Last Exam | 46.4% | — |
| SimpleQA Verified | 73.5% | — |
| MMLU-Pro | — | 33.5% |
| Vectara Hallucination Rate | 10.4% | — |
| GPQA (HELM) | — | 29.6% |
| ARC (AI2) Challenge | — | 87.3% |
| MMLU | — | 70.6% |
| OpenBookQA | — | 85.8% |
| TriviaQA | — | 82.2% |

## Multimodal

- Gemini 3.1 Pro Preview: 37.9 (#69)
- Mixtral 8x7B: —

| Benchmark | Gemini 3.1 Pro Preview | Mixtral 8x7B |
|---|---|---|
| LMArena Vision | 1296 | — |
| Blueprint-Bench 2 | 26.5% | — |
| Furniture Assembly | 26.7% | — |
| LMArena Document | 1444 | — |

## Multilingual

- Gemini 3.1 Pro Preview: 57.0 (#12)
- Mixtral 8x7B: 29.6 (#266)

| Benchmark | Gemini 3.1 Pro Preview | Mixtral 8x7B |
|---|---|---|
| LMArena Non-English | 1477 | 1077 |
| LMArena Chinese | 1529 | 1055 |
| LMArena French | 1487 | 1166 |
| LMArena German | 1491 | 1114 |
| LMArena Japanese | 1493 | 931 |
| LMArena Korean | 1455 | 968 |
| LMArena Russian | 1498 | 1090 |
| LMArena Spanish | 1479 | 1111 |

## Instruction Following

- Gemini 3.1 Pro Preview: 77.0 (#32)
- Mixtral 8x7B: 51.0 (#297)

| Benchmark | Gemini 3.1 Pro Preview | Mixtral 8x7B |
|---|---|---|
| LMArena Instruction Following | 1466 | 1109 |
| IFEval | — | 57.5% |

## Long Context

- Gemini 3.1 Pro Preview: 47.4 (#18)
- Mixtral 8x7B: 33.4 (#260)

| Benchmark | Gemini 3.1 Pro Preview | Mixtral 8x7B |
|---|---|---|
| LMArena Longer Query | 1483 | 1103 |
| CL-bench | 20.8% | — |
| CL-bench Life | 16.9% | — |

## Writing & Preference

- Gemini 3.1 Pro Preview: 66.1 (#37)
- Mixtral 8x7B: 34.2 (#270)

| Benchmark | Gemini 3.1 Pro Preview | Mixtral 8x7B |
|---|---|---|
| LMArena Text | 1481 | 1132 |
| LMArena Creative Writing | 1482 | 1109 |
| LMArena Multi-Turn | 1488 | 1115 |
| EQ-Bench Creative Writing | 1491 | — |
| WildBench | — | 67.3% |
| EQ-Bench 4 | 1142 | — |

## FAQ

### Is Gemini 3.1 Pro Preview better than Mixtral 8x7B?

Gemini 3.1 Pro Preview is the stronger model overall, scoring 56.7 to 27.1 on the Noometry Index. Mixtral 8x7B costs 6.4× less per token, which makes it the better buy when Gemini 3.1 Pro Preview's lead doesn't matter for your workload.

### Which is cheaper, Gemini 3.1 Pro Preview or Mixtral 8x7B?

Mixtral 8x7B is cheaper. It lists at $0.70 per million input tokens and $0.70 per million output tokens; Gemini 3.1 Pro Preview lists at $2 and $12.

### Is Gemini 3.1 Pro Preview or Mixtral 8x7B better for coding?

Gemini 3.1 Pro Preview scores higher on coding benchmarks: 42.5 versus 32.8 in the Noometry coding category.

### Which has the bigger context window?

Gemini 3.1 Pro Preview does, with 1.05M tokens against 32K.

### How many benchmarks do Gemini 3.1 Pro Preview and Mixtral 8x7B share?

21 benchmarks have published results for both models. Gemini 3.1 Pro Preview has 71 scored results on Noometry and Mixtral 8x7B has 38.