# Gemini 2.5 Flash vs GLM-5.1

> Side-by-side benchmark comparison for Gemini 2.5 Flash and GLM-5.1 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gemini-2-5-flash-vs-glm-5-1
- Last updated: September 23, 2026

- Shared sourced benchmarks: 2
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.6

## Quick Verdict

Evidence is too thin for a benchmark verdict: Gemini 2.5 Flash and GLM-5.1 share only 2 sourced benchmark rows.

## Summary

- Only 2 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Gemini 2.5 Flash has the lower published output-token price.
- Gemini 2.5 Flash has the larger published context window at 1M.

## Model Snapshot

| Property | Gemini 2.5 Flash | GLM-5.1 |
|----------|----------|----------|
| Creator | Google | Z.AI |
| Type | Proprietary | Open Weight |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 1M | 203K |
| Independent public score (not head-to-head) | 42.97 | 57.71 |
| Benchmarks Covered | 2 | 26 |
| Pricing (input/output) | $0.30 / $2.50 | $1.40 / $4.40 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Gemini 2.5 Flash public-lane score: Coming soon
- GLM-5.1 public-lane score: 42.1 (Estimated · #43/105)

| Benchmark | Gemini 2.5 Flash | GLM-5.1 | Winner |
|-----------|-----------|-----------|--------|
| 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 |
| Claw-Eval | Coming soon | 62.3% | Coming soon |
| Gert Labs | Coming soon | 60.11% | Coming soon |
| ResearchClawBench | Coming soon | 18.2% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 56.9% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Gemini 2.5 Flash public-lane score: Coming soon
- GLM-5.1 public-lane score: 51.5 (Supported · #36/135)

| Benchmark | Gemini 2.5 Flash | GLM-5.1 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Pro | Coming soon | 58.4% | Coming soon |
| NL2Repo | Coming soon | 42.7% | Coming soon |
| SWE-Rebench | Coming soon | 62.7% | Coming soon |
| Vibe Code Bench | Coming soon | 31.46% | Coming soon |
| OpenHarmony Bench | Coming soon | 52.3% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 81.4% | Coming soon |
| SWE-bench (Vals) | Coming soon | 76.4% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Gemini 2.5 Flash public-lane score: 55.3 (Unranked · 2 rankable rows)
- GLM-5.1 public-lane score: 71.7 (Unranked · 2 rankable rows)

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Gemini 2.5 Flash public-lane score: 56.6 (Unranked · 1 rankable row)
- GLM-5.1 public-lane score: Coming soon

### Knowledge

- Winner: Insufficient shared evidence
- Gemini 2.5 Flash public-lane score: 34.5 (Estimated · #108/160)
- GLM-5.1 public-lane score: 50.2 (Supported · #54/160)

| Benchmark | Gemini 2.5 Flash | GLM-5.1 | Winner |
|-----------|-----------|-----------|--------|
| GPQA-D | Coming soon | 86.2% | Coming soon |
| HLE | Coming soon | 52.3% | Coming soon |
| GPQA Diamond (Vals) | Coming soon | 84.5% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 86.9% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Gemini 2.5 Flash public-lane score: 43.7 (#93/124)
- GLM-5.1 public-lane score: 92.4 (#4/124)

### Mathematics

- Winner: Insufficient shared evidence
- Gemini 2.5 Flash public-lane score: 28.6 (Unranked · 2 rankable rows)
- GLM-5.1 public-lane score: 63.8 (#3/7)

| Benchmark | Gemini 2.5 Flash | GLM-5.1 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 4.844% | 33.448% | GLM-5.1 |
| 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

### Is there enough evidence to pick between Gemini 2.5 Flash and GLM-5.1?

Not yet. The models share only 2 sourced benchmark rows, so this mirror reports the available measurements and metadata without naming a broad winner.

### What can I compare safely on this page?

Published pricing, context windows, model type, and individual shared benchmark rows are directly comparable. Independent overall scores and non-overlapping benchmark coverage are labeled separately and should not be read as a controlled head-to-head result.

## Related Comparisons

- [Gemini 2.5 Flash vs GLM-5.3](/compare/gemini-2-5-flash-vs-glm-5-3)
- [GLM-5.1 vs GLM-5.3](/compare/glm-5-1-vs-glm-5-3)
- [Gemini 2.5 Flash vs GLM-5.2](/compare/gemini-2-5-flash-vs-glm-5-2)
- [GLM-5.1 vs GLM-5.2](/compare/glm-5-1-vs-glm-5-2)

## Explore More

- [Gemini 2.5 Flash profile](/models/gemini-2-5-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)