# GLM-5.1 vs GLM-5.3

> Side-by-side benchmark comparison for GLM-5.1 and GLM-5.3 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/glm-5-1-vs-glm-5-3
- Last updated: September 28, 2026

- Shared sourced benchmarks: 8
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.7

## Quick Verdict

Pick GLM-5.3 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

- GLM-5.3 leads overall 65.44 to 57.11.
- The clearest category separation is in agentic, where the averages are 41.9 for GLM-5.1 and 67.3 for GLM-5.3.
- The biggest single benchmark swing is SWE-bench (Vals) in Coding, with scores of 76.4% and 95.4%.
- GLM-5.3 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- GLM-5.3 also has the larger context window at 1M.

## Model Snapshot

| Property | GLM-5.1 | GLM-5.3 |
|----------|----------|----------|
| Creator | Z.AI | Z.AI |
| Type | Open Weight | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 203K | 1M |
| Overall Score | 57.11 | 65.44 |
| Benchmarks Covered | 26 | 24 |
| Pricing (input/output) | $1.40 / $4.40 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Directional only
- GLM-5.1 public-lane score: 41.9 (Estimated · #50/111)
- GLM-5.3 public-lane score: 67.3 (Supported · #9/111)

| Benchmark | GLM-5.1 | GLM-5.3 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 63.5% | Coming soon | Coming soon |
| BrowseComp | 68% | Coming soon | Coming soon |
| τ³-bench results | 70.6% | Coming soon | Coming soon |
| MCP Atlas | 71.8% | Coming soon | Coming soon |
| CyberGym | 68.7% | 84.5% | GLM-5.3 |
| Claw-Eval | 62.3% | Coming soon | Coming soon |
| Gert Labs | 60.11% | Coming soon | Coming soon |
| ResearchClawBench | 18.2% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 56.9% | 71.5% | GLM-5.3 |
| Terminal-Bench 2.1 | Coming soon | 88.2% | Coming soon |
| terminalBench3 | Coming soon | 28.3% | Coming soon |
| ExploitGym | Coming soon | 15.0% | Coming soon |
| Toolathlon-Verified | Coming soon | 73.0% | Coming soon |
| AutomationBench | Coming soon | 48.2% | Coming soon |
| Agents' Last Exam | Coming soon | 28.5% | Coming soon |
| HLE w/ tools | Coming soon | 62.5% | Coming soon |

### Coding

- Winner: GLM-5.3
- GLM-5.1 public-lane score: 50.6 (Supported · #37/136)
- GLM-5.3 public-lane score: 56.7 (Supported · #22/136)

| Benchmark | GLM-5.1 | GLM-5.3 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Pro | 58.4% | Coming soon | Coming soon |
| NL2Repo | 42.7% | 58% | GLM-5.3 |
| SWE-Rebench | 62.7% | Coming soon | Coming soon |
| Vibe Code Bench | 31.46% | Coming soon | Coming soon |
| OpenHarmony Bench | 52.3% | 60.8% | GLM-5.3 |
| LiveCodeBench (Vals) | 81.4% | 80.5% | GLM-5.1 |
| SWE-bench (Vals) | 76.4% | 95.4% | GLM-5.3 |
| Terminal-Bench 2.1 | Coming soon | 88.2% | Coming soon |
| terminalBench3 | Coming soon | 28.3% | Coming soon |
| DeepSWE | Coming soon | 66.9% | Coming soon |
| ProgramBench | Coming soon | 19.0% | Coming soon |
| FrontierSWE | Coming soon | 78.1% | Coming soon |
| sweMarathon | Coming soon | 42.5% | Coming soon |
| PostTrain Bench | Coming soon | 39.8% | Coming soon |
| VulcanBench v3 | Coming soon | 78.3% | Coming soon |
| FrontierSWE v2 | Coming soon | 30.2% | Coming soon |

### Reasoning

- Winner: Not comparable
- GLM-5.1 public-lane score: 73 (Unranked · 2 rankable rows)
- GLM-5.3 public-lane score: 77.1 (#11/27)

### Knowledge

- Winner: GLM-5.3
- GLM-5.1 public-lane score: 52.3 (Supported · #52/160)
- GLM-5.3 public-lane score: 61.9 (Supported · #33/160)

| Benchmark | GLM-5.1 | GLM-5.3 | Winner |
|-----------|-----------|-----------|--------|
| GPQA-D | 86.2% | Coming soon | Coming soon |
| HLE | 52.3% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 84.5% | 88.1% | GLM-5.3 |
| MMLU-Pro (Vals) | 86.9% | 86.8% | GLM-5.1 |

### Instruction Following

- Winner: Not comparable
- GLM-5.1 public-lane score: 92.4 (#4/124)
- GLM-5.3 public-lane score: Coming soon

### Mathematics

- Winner: Not comparable
- GLM-5.1 public-lane score: 63.8 (#3/7)
- GLM-5.3 public-lane score: Coming soon

| Benchmark | GLM-5.1 | GLM-5.3 | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | 95.3% | Coming soon | Coming soon |
| HMMT Nov 2025 | 94.0% | Coming soon | Coming soon |
| HMMT Feb 2026 | 82.6% | Coming soon | Coming soon |
| MMAnswerBench | 83.8% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 33.448% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 12.500% | Coming soon | Coming soon |

## FAQ

### Which is better overall, GLM-5.1 or GLM-5.3?

GLM-5.3 is ahead overall on BenchLM right now.

### Where is the biggest gap between GLM-5.1 and GLM-5.3?

The widest category gap is in agentic, where the averages are 41.9 for GLM-5.1 and 67.3 for GLM-5.3.

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

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

### How many benchmarks does GLM-5.3 cover on BenchLM?

GLM-5.3 currently has 24 sourced benchmark scores on BenchLM.

## Related Comparisons

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

## Explore More

- [GLM-5.1 profile](/models/glm-5-1)
- [GLM-5.3 profile](/models/glm-5-3)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)