# Gemini 3.1 Pro vs Grok 4.5

> Side-by-side benchmark comparison for Gemini 3.1 Pro and Grok 4.5 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gemini-3-1-pro-vs-grok-4-5
- Last updated: October 7, 2026

- Shared sourced benchmarks: 8
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Gemini 3.1 Pro leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- Gemini 3.1 Pro has the higher overall point estimate 64.79 to 63.97. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in agentic, where the averages are 38.4 for Gemini 3.1 Pro and 57.6 for Grok 4.5.
- The biggest single benchmark swing is ARC-AGI-2 in Reasoning, with scores of 77.1% and 52.6%.
- Grok 4.5 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Gemini 3.1 Pro also has the larger context window at 1M.

## Model Snapshot

| Property | Gemini 3.1 Pro | Grok 4.5 |
|----------|----------|----------|
| Creator | Google | xAI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 500K |
| Overall Score | 64.79 | 63.97 |
| Benchmarks Covered | 29 | 17 |
| Pricing (input/output) | $2.00 / $12.00 | $2.00 / $6.00 |

## Category Breakdown

### Agentic

- Winner: Grok 4.5
- Gemini 3.1 Pro public-lane score: 38.4 (Supported · #66/122)
- Grok 4.5 public-lane score: 57.6 (Supported · #29/122)

| Benchmark | Gemini 3.1 Pro | Grok 4.5 | Winner |
|-----------|-----------|-----------|--------|
| Claw-Eval | 57.8% | Coming soon | Coming soon |
| DeepSearchQA | 69.7% | Coming soon | Coming soon |
| τ²-bench results | 95.6% | Coming soon | Coming soon |
| Gert Labs | 56.87% | Coming soon | Coming soon |
| ResearchClawBench | 13.3% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 70.8% | 67.8% | Gemini 3.1 Pro |
| Terminal-Bench 3.0 | Coming soon | 15.7% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 83.3% | Coming soon |
| deepSwe | Coming soon | 53% | Coming soon |

### Coding

- Winner: Grok 4.5
- Gemini 3.1 Pro public-lane score: 41.1 (Supported · #63/146)
- Grok 4.5 public-lane score: 57.7 (Supported · #27/146)

| Benchmark | Gemini 3.1 Pro | Grok 4.5 | Winner |
|-----------|-----------|-----------|--------|
| LiveCodeBench Pro | 82.9% | Coming soon | Coming soon |
| React Native Evals | 78.9% | Coming soon | Coming soon |
| Vibe Code Bench | 32.03% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 88.5% | 87.4% | Gemini 3.1 Pro |
| SWE-bench (Vals) | 78.8% | 86.6% | Grok 4.5 |
| PostTrainBench v1.1 | 22.0% | 23.4% | Grok 4.5 |
| SWE-bench Pro | Coming soon | 64.7% | Coming soon |
| SWE Multilingual | Coming soon | 78% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 83.3% | Coming soon |
| CursorBench 3.2 | Coming soon | 66.7% | Coming soon |
| VulcanBench v3 | Coming soon | 89.9% | Coming soon |

### Reasoning

- Winner: Not comparable
- Gemini 3.1 Pro public-lane score: 54.5 (Unranked · 2 rankable rows)
- Grok 4.5 public-lane score: 50.4 (#28/28)

| Benchmark | Gemini 3.1 Pro | Grok 4.5 | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 77.1% | 52.6% | Gemini 3.1 Pro |
| ARC-AGI-3 | 0.4% | 0.3% | Gemini 3.1 Pro |
| ARC-AGI-1 | Coming soon | 85.67% | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Gemini 3.1 Pro public-lane score: 80.1 (#13/49)
- Grok 4.5 public-lane score: 79.5 (Unranked · 1 rankable row)

| Benchmark | Gemini 3.1 Pro | Grok 4.5 | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 83.9% | Coming soon | Coming soon |
| CharXiv | 80.2% | Coming soon | Coming soon |
| ERQA | 69.4% | Coming soon | Coming soon |
| SimpleVQA | 72.4% | Coming soon | Coming soon |
| ScreenSpot Pro | 84.4% | Coming soon | Coming soon |
| ZeroBench | 29.0% | Coming soon | Coming soon |
| MedXpertQA (MM) | 81.3% | Coming soon | Coming soon |

### Knowledge

- Winner: Grok 4.5
- Gemini 3.1 Pro public-lane score: 65.8 (Supported · #22/174)
- Grok 4.5 public-lane score: 67 (Supported · #19/174)

| Benchmark | Gemini 3.1 Pro | Grok 4.5 | Winner |
|-----------|-----------|-----------|--------|
| GPQA-D | 94.3% | Coming soon | Coming soon |
| HLE w/o tools | 45.4% | Coming soon | Coming soon |
| HealthBench Hard | 20.6% | Coming soon | Coming soon |
| MedXpertQA (Text) | 71.5% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 95.5% | 92.9% | Gemini 3.1 Pro |
| MMLU-Pro (Vals) | 91.0% | 89.2% | Gemini 3.1 Pro |

### Mathematics

- Winner: Not comparable
- Gemini 3.1 Pro public-lane score: 54.2 (Unranked · 2 rankable rows)
- Grok 4.5 public-lane score: Coming soon

| Benchmark | Gemini 3.1 Pro | Grok 4.5 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 36.900% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 16.700% | Coming soon | Coming soon |

## FAQ

### Which is better overall, Gemini 3.1 Pro or Grok 4.5?

Gemini 3.1 Pro has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

### Where is the biggest gap between Gemini 3.1 Pro and Grok 4.5?

The widest category gap is in agentic, where the averages are 38.4 for Gemini 3.1 Pro and 57.6 for Grok 4.5.

### How many benchmarks does Gemini 3.1 Pro cover on BenchLM?

Gemini 3.1 Pro currently has 29 sourced benchmark scores on BenchLM.

### How many benchmarks does Grok 4.5 cover on BenchLM?

Grok 4.5 currently has 17 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Gemini 3.1 Pro vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-gemini-3-1-pro)
- [Grok 4.5 vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-grok-4-5)
- [Gemini 3.1 Pro vs GPT-6 Astra](/compare/gemini-3-1-pro-vs-gpt-6-astra)
- [Grok 4.5 vs GPT-6 Astra](/compare/gpt-6-astra-vs-grok-4-5)

## Explore More

- [Gemini 3.1 Pro profile](/models/gemini-3-1-pro)
- [Grok 4.5 profile](/models/grok-4-5)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)