# Gemini 3.1 Pro vs GLM-5.1

> Side-by-side benchmark comparison for Gemini 3.1 Pro and GLM-5.1 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gemini-3-1-pro-vs-glm-5-1
- Last updated: September 23, 2026

- Shared sourced benchmarks: 12
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.6

## Quick Verdict

Pick Gemini 3.1 Pro if you want the stronger benchmark profile. GLM-5.1 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Gemini 3.1 Pro leads overall 64.97 to 57.71.
- The clearest category separation is in reasoning, where the averages are 50.7 for Gemini 3.1 Pro and 71.7 for GLM-5.1.
- The biggest single benchmark swing is Terminal-Bench 2.1 (Vals) in Agentic, with scores of 70.8% and 56.9%.
- GLM-5.1 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 | GLM-5.1 |
|----------|----------|----------|
| Creator | Google | Z.AI |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 203K |
| Overall Score | 64.97 | 57.71 |
| Benchmarks Covered | 28 | 26 |
| Pricing (input/output) | $2.00 / $12.00 | $1.40 / $4.40 |

## Category Breakdown

### Agentic

- Winner: Directional only
- Gemini 3.1 Pro public-lane score: 38.9 (Supported · #47/105)
- GLM-5.1 public-lane score: 42.1 (Estimated · #43/105)

| Benchmark | Gemini 3.1 Pro | GLM-5.1 | Winner |
|-----------|-----------|-----------|--------|
| Claw-Eval | 57.8% | 62.3% | GLM-5.1 |
| DeepSearchQA | 69.7% | Coming soon | Coming soon |
| τ²-bench results | 95.6% | Coming soon | Coming soon |
| Gert Labs | 56.87% | 60.11% | GLM-5.1 |
| ResearchClawBench | 13.3% | 18.2% | GLM-5.1 |
| Terminal-Bench 2.1 (Vals) | 70.8% | 56.9% | Gemini 3.1 Pro |
| Terminal-Bench 2.0 | Coming soon | 63.5% | Coming soon |
| BrowseComp | Coming soon | 68% | Coming soon |
| τ³-bench results | Coming soon | 70.6% | Coming soon |
| MCP Atlas | Coming soon | 71.8% | Coming soon |
| CyberGym | Coming soon | 68.7% | Coming soon |

### Coding

- Winner: GLM-5.1
- Gemini 3.1 Pro public-lane score: 43.4 (Supported · #53/135)
- GLM-5.1 public-lane score: 51.5 (Supported · #36/135)

| Benchmark | Gemini 3.1 Pro | GLM-5.1 | Winner |
|-----------|-----------|-----------|--------|
| LiveCodeBench Pro | 82.9% | Coming soon | Coming soon |
| React Native Evals | 78.9% | Coming soon | Coming soon |
| Vibe Code Bench | 32.03% | 31.46% | Gemini 3.1 Pro |
| LiveCodeBench (Vals) | 88.5% | 81.4% | Gemini 3.1 Pro |
| SWE-bench (Vals) | 78.8% | 76.4% | Gemini 3.1 Pro |
| SWE-bench Pro | Coming soon | 58.4% | Coming soon |
| NL2Repo | Coming soon | 42.7% | Coming soon |
| SWE-Rebench | Coming soon | 62.7% | Coming soon |
| OpenHarmony Bench | Coming soon | 52.3% | Coming soon |

### Reasoning

- Winner: Not comparable
- Gemini 3.1 Pro public-lane score: 50.7 (Unranked · 2 rankable rows)
- GLM-5.1 public-lane score: 71.7 (Unranked · 2 rankable rows)

| Benchmark | Gemini 3.1 Pro | GLM-5.1 | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 77.1% | Coming soon | Coming soon |
| ARC-AGI-3 | 0.4% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Gemini 3.1 Pro public-lane score: 79.1 (#13/50)
- GLM-5.1 public-lane score: Coming soon

| Benchmark | Gemini 3.1 Pro | GLM-5.1 | 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: Gemini 3.1 Pro
- Gemini 3.1 Pro public-lane score: 64.2 (Supported · #23/160)
- GLM-5.1 public-lane score: 50.2 (Supported · #54/160)

| Benchmark | Gemini 3.1 Pro | GLM-5.1 | Winner |
|-----------|-----------|-----------|--------|
| GPQA-D | 94.3% | 86.2% | Gemini 3.1 Pro |
| 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% | 84.5% | Gemini 3.1 Pro |
| MMLU-Pro (Vals) | 91.0% | 86.9% | Gemini 3.1 Pro |
| HLE | Coming soon | 52.3% | Coming soon |

### Instruction Following

- Winner: Not comparable
- Gemini 3.1 Pro public-lane score: Coming soon
- GLM-5.1 public-lane score: 92.4 (#4/124)

### Mathematics

- Winner: Not comparable
- Gemini 3.1 Pro public-lane score: 54.2 (Unranked · 2 rankable rows)
- GLM-5.1 public-lane score: 63.8 (#3/7)

| Benchmark | Gemini 3.1 Pro | GLM-5.1 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 36.900% | 33.448% | Gemini 3.1 Pro |
| FrontierMath v2 (Tier 4) | 16.700% | 12.500% | Gemini 3.1 Pro |
| AIME26 | Coming soon | 95.3% | Coming soon |
| HMMT Nov 2025 | Coming soon | 94.0% | Coming soon |
| HMMT Feb 2026 | Coming soon | 82.6% | Coming soon |
| MMAnswerBench | Coming soon | 83.8% | Coming soon |

## FAQ

### Which is better overall, Gemini 3.1 Pro or GLM-5.1?

Gemini 3.1 Pro is ahead overall on BenchLM right now.

### Where is the biggest gap between Gemini 3.1 Pro and GLM-5.1?

The widest category gap is in reasoning, where the averages are 50.7 for Gemini 3.1 Pro and 71.7 for GLM-5.1.

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

Gemini 3.1 Pro currently has 28 sourced benchmark scores on BenchLM.

### How many benchmarks does GLM-5.1 cover on BenchLM?

GLM-5.1 currently has 26 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Gemini 3.1 Pro vs GLM-5.3](/compare/gemini-3-1-pro-vs-glm-5-3)
- [GLM-5.1 vs GLM-5.3](/compare/glm-5-1-vs-glm-5-3)
- [Gemini 3.1 Pro vs GLM-5.2](/compare/gemini-3-1-pro-vs-glm-5-2)
- [GLM-5.1 vs GLM-5.2](/compare/glm-5-1-vs-glm-5-2)

## Explore More

- [Gemini 3.1 Pro profile](/models/gemini-3-1-pro)
- [GLM-5.1 profile](/models/glm-5-1)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)