# Gemini 3.1 Pro vs GLM-5.3-Flash

> Side-by-side benchmark comparison for Gemini 3.1 Pro and GLM-5.3-Flash across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gemini-3-1-pro-vs-glm-5-3-flash
- Last updated: October 10, 2026

- Shared sourced benchmarks: 6
- 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 65.17 to 57.36. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in reasoning, where the averages are 58.2 for Gemini 3.1 Pro and 81.1 for GLM-5.3-Flash.
- The biggest single benchmark swing is SWE-bench (Vals) in Coding, with scores of 78.8% and 92.0%.
- GLM-5.3-Flash is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.

## Model Snapshot

| Property | Gemini 3.1 Pro | GLM-5.3-Flash |
|----------|----------|----------|
| Creator | Google | Z.AI |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Overall Score | 65.17 | 57.36 |
| Benchmarks Covered | 29 | 21 |
| Pricing (input/output) | $2.00 / $12.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: GLM-5.3-Flash
- Gemini 3.1 Pro public-lane score: 38.3 (Supported · #66/123)
- GLM-5.3-Flash public-lane score: 55.7 (Supported · #34/123)

| Benchmark | Gemini 3.1 Pro | GLM-5.3-Flash | 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% | 62.9% | Gemini 3.1 Pro |
| Terminal-Bench 2.1 | Coming soon | 84.3% | Coming soon |
| Toolathlon-Verified | Coming soon | 78.4% | Coming soon |
| AutomationBench | Coming soon | 48.8% | Coming soon |
| Agents' Last Exam | Coming soon | 26.3% | Coming soon |
| HLE w/ tools | Coming soon | 55.3% | Coming soon |

### Coding

- Winner: GLM-5.3-Flash
- Gemini 3.1 Pro public-lane score: 40.2 (Supported · #63/146)
- GLM-5.3-Flash public-lane score: 49.3 (Supported · #42/146)

| Benchmark | Gemini 3.1 Pro | GLM-5.3-Flash | 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% | 80.5% | Gemini 3.1 Pro |
| SWE-bench (Vals) | 78.8% | 92.0% | GLM-5.3-Flash |
| PostTrainBench v1.1 | 22.0% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 84.3% | Coming soon |
| DeepSWE | Coming soon | 63.4% | Coming soon |
| NL2Repo | Coming soon | 56.3% | Coming soon |
| OpenHarmony Bench | Coming soon | 57.3% | Coming soon |
| FrontierSWE v2 | Coming soon | 18.1% | Coming soon |
| Bug Hunt Bench | Coming soon | 17.7 fixes | Coming soon |

### Reasoning

- Winner: Not comparable
- Gemini 3.1 Pro public-lane score: 58.2 (Unranked · 2 rankable rows)
- GLM-5.3-Flash public-lane score: 81.1 (#11/28)

| Benchmark | Gemini 3.1 Pro | GLM-5.3-Flash | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 77.1% | Coming soon | Coming soon |
| ARC-AGI-3 | 0.4% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Directional only
- Gemini 3.1 Pro public-lane score: 80.1 (#17/54)
- GLM-5.3-Flash public-lane score: 84 (#14/54)

| Benchmark | Gemini 3.1 Pro | GLM-5.3-Flash | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 83.9% | Coming soon | Coming soon |
| CharXiv | 80.2% | 89.4% | GLM-5.3-Flash |
| 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 |
| OfficeQA Pro | Coming soon | 62.4% | Coming soon |
| Chartography (tools) | Coming soon | 78.0% | Coming soon |
| BabyVision | Coming soon | 53.4% | Coming soon |
| MMVU | Coming soon | 80.5% | Coming soon |

### Knowledge

- Winner: Gemini 3.1 Pro
- Gemini 3.1 Pro public-lane score: 67.2 (Supported · #23/177)
- GLM-5.3-Flash public-lane score: 60.5 (Supported · #43/177)

| Benchmark | Gemini 3.1 Pro | GLM-5.3-Flash | 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% | 86.4% | Gemini 3.1 Pro |
| MMLU-Pro (Vals) | 91.0% | 86.1% | Gemini 3.1 Pro |

### Mathematics

- Winner: Not comparable
- Gemini 3.1 Pro public-lane score: 54.7 (Unranked · 2 rankable rows)
- GLM-5.3-Flash public-lane score: Coming soon

| Benchmark | Gemini 3.1 Pro | GLM-5.3-Flash | 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 GLM-5.3-Flash?

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 GLM-5.3-Flash?

The widest category gap is in reasoning, where the averages are 58.2 for Gemini 3.1 Pro and 81.1 for GLM-5.3-Flash.

### 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 GLM-5.3-Flash cover on BenchLM?

GLM-5.3-Flash currently has 21 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-5.3-Flash vs GLM-5.3](/compare/glm-5-3-vs-glm-5-3-flash)
- [Gemini 3.1 Pro vs GLM-5.2](/compare/gemini-3-1-pro-vs-glm-5-2)
- [GLM-5.3-Flash vs GLM-5.2](/compare/glm-5-2-vs-glm-5-3-flash)

## Explore More

- [Gemini 3.1 Pro profile](/models/gemini-3-1-pro)
- [GLM-5.3-Flash profile](/models/glm-5-3-flash)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)