# Gemini 3 Flash vs GLM-5.1

> Side-by-side benchmark comparison for Gemini 3 Flash and GLM-5.1 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

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

- Shared sourced benchmarks: 10
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.6

## Quick Verdict

Pick GLM-5.1 if you want the stronger benchmark profile. Gemini 3 Flash only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- GLM-5.1 leads overall 57.71 to 55.62.
- The clearest category separation is in instruction following, where the averages are 64.7 for Gemini 3 Flash and 92.4 for GLM-5.1.
- The biggest single benchmark swing is Claw-Eval in Agentic, with scores of 49.2% and 62.3%.
- Gemini 3 Flash is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Gemini 3 Flash also has the larger context window at 1M.

## Model Snapshot

| Property | Gemini 3 Flash | GLM-5.1 |
|----------|----------|----------|
| Creator | Google | Z.AI |
| Type | Proprietary | Open Weight |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 1M | 203K |
| Overall Score | 55.62 | 57.71 |
| Benchmarks Covered | 11 | 26 |
| Pricing (input/output) | $0.50 / $3.00 | $1.40 / $4.40 |

## Category Breakdown

### Agentic

- Winner: Directional only
- Gemini 3 Flash public-lane score: 31.4 (Supported · #65/105)
- GLM-5.1 public-lane score: 42.1 (Estimated · #43/105)

| Benchmark | Gemini 3 Flash | GLM-5.1 | Winner |
|-----------|-----------|-----------|--------|
| Claw-Eval | 49.2% | 62.3% | GLM-5.1 |
| Gert Labs | 56.63% | 60.11% | GLM-5.1 |
| JobBench | 11.4% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 53.9% | 56.9% | GLM-5.1 |
| 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 |
| ResearchClawBench | Coming soon | 18.2% | Coming soon |

### Coding

- Winner: GLM-5.1
- Gemini 3 Flash public-lane score: 36.9 (Supported · #75/135)
- GLM-5.1 public-lane score: 51.5 (Supported · #36/135)

| Benchmark | Gemini 3 Flash | GLM-5.1 | Winner |
|-----------|-----------|-----------|--------|
| Vibe Code Bench | 20.20% | 31.46% | GLM-5.1 |
| LiveCodeBench (Vals) | 85.6% | 81.4% | Gemini 3 Flash |
| SWE-bench (Vals) | 75.0% | 76.4% | GLM-5.1 |
| 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 Flash public-lane score: 59 (Unranked · 2 rankable rows)
- GLM-5.1 public-lane score: 71.7 (Unranked · 2 rankable rows)

### Multimodal & Grounded

- Winner: Not comparable
- Gemini 3 Flash public-lane score: 75.8 (Unranked · 1 rankable row)
- GLM-5.1 public-lane score: Coming soon

### Knowledge

- Winner: Gemini 3 Flash
- Gemini 3 Flash public-lane score: 52.4 (Supported · #46/160)
- GLM-5.1 public-lane score: 50.2 (Supported · #54/160)

| Benchmark | Gemini 3 Flash | GLM-5.1 | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | 87.9% | 84.5% | Gemini 3 Flash |
| MMLU-Pro (Vals) | 88.6% | 86.9% | Gemini 3 Flash |
| GPQA-D | Coming soon | 86.2% | Coming soon |
| HLE | Coming soon | 52.3% | Coming soon |

### Instruction Following

- Winner: Directional only
- Gemini 3 Flash public-lane score: 64.7 (#70/124)
- GLM-5.1 public-lane score: 92.4 (#4/124)

### Mathematics

- Winner: Not comparable
- Gemini 3 Flash public-lane score: 50 (Unranked · 2 rankable rows)
- GLM-5.1 public-lane score: 63.8 (#3/7)

| Benchmark | Gemini 3 Flash | GLM-5.1 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 35.640% | 33.448% | Gemini 3 Flash |
| FrontierMath v2 (Tier 4) | 4.167% | 12.500% | GLM-5.1 |
| 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 Flash or GLM-5.1?

GLM-5.1 is ahead overall on BenchLM right now.

### Where is the biggest gap between Gemini 3 Flash and GLM-5.1?

The widest category gap is in instruction following, where the averages are 64.7 for Gemini 3 Flash and 92.4 for GLM-5.1.

### How many benchmarks does Gemini 3 Flash cover on BenchLM?

Gemini 3 Flash currently has 11 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 Flash vs GLM-5.3](/compare/gemini-3-flash-vs-glm-5-3)
- [GLM-5.1 vs GLM-5.3](/compare/glm-5-1-vs-glm-5-3)
- [Gemini 3 Flash vs GLM-5.2](/compare/gemini-3-flash-vs-glm-5-2)
- [GLM-5.1 vs GLM-5.2](/compare/glm-5-1-vs-glm-5-2)

## Explore More

- [Gemini 3 Flash profile](/models/gemini-3-flash)
- [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)