# GLM-5.3 vs GLM-5.3-Flash

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

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

- Shared sourced benchmarks: 16
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

GLM-5.3 leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- GLM-5.3 has the higher overall point estimate 68.64 to 57.36. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in agentic, where the averages are 67.6 for GLM-5.3 and 55.7 for GLM-5.3-Flash.
- The biggest single benchmark swing is FrontierSWE v2 in Coding, with scores of 30.2% and 18.1%.

## Model Snapshot

| Property | GLM-5.3 | GLM-5.3-Flash |
|----------|----------|----------|
| Creator | Z.AI | Z.AI |
| Type | Open Weight | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Overall Score | 68.64 | 57.36 |
| Benchmarks Covered | 26 | 21 |
| Pricing (input/output) | $0.00 / $0.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: GLM-5.3
- GLM-5.3 public-lane score: 67.6 (Supported · #12/123)
- GLM-5.3-Flash public-lane score: 55.7 (Supported · #34/123)

| Benchmark | GLM-5.3 | GLM-5.3-Flash | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 88.2% | 84.3% | GLM-5.3 |
| terminalBench3 | 28.3% | Coming soon | Coming soon |
| CyberGym | 84.5% | Coming soon | Coming soon |
| ExploitGym | 15.0% | Coming soon | Coming soon |
| Toolathlon-Verified | 73.0% | 78.4% | GLM-5.3-Flash |
| AutomationBench | 48.2% | 48.8% | GLM-5.3-Flash |
| Agents' Last Exam | 28.5% | 26.3% | GLM-5.3 |
| HLE w/ tools | 62.5% | 55.3% | GLM-5.3 |
| Terminal-Bench 2.1 (Vals) | 71.5% | 62.9% | GLM-5.3 |

### Coding

- Winner: GLM-5.3
- GLM-5.3 public-lane score: 57.2 (Supported · #27/146)
- GLM-5.3-Flash public-lane score: 49.3 (Supported · #42/146)

| Benchmark | GLM-5.3 | GLM-5.3-Flash | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 88.2% | 84.3% | GLM-5.3 |
| terminalBench3 | 28.3% | Coming soon | Coming soon |
| DeepSWE | 66.9% | 63.4% | GLM-5.3 |
| NL2Repo | 58% | 56.3% | GLM-5.3 |
| ProgramBench | 19.0% | Coming soon | Coming soon |
| FrontierSWE | 78.1% | Coming soon | Coming soon |
| sweMarathon | 42.5% | Coming soon | Coming soon |
| PostTrain Bench | 39.8% | Coming soon | Coming soon |
| VulcanBench v3 | 78.3% | Coming soon | Coming soon |
| OpenHarmony Bench | 60.8% | 57.3% | GLM-5.3 |
| FrontierSWE v2 | 30.2% | 18.1% | GLM-5.3 |
| LiveCodeBench (Vals) | 80.5% | 80.5% | Tie |
| SWE-bench (Vals) | 95.4% | 92.0% | GLM-5.3 |
| Bug Hunt Bench | 19.0 fixes | 17.7 fixes | GLM-5.3 |

### Reasoning

- Winner: Directional only
- GLM-5.3 public-lane score: 80.9 (#12/28)
- GLM-5.3-Flash public-lane score: 81.1 (#11/28)

### Multimodal & Grounded

- Winner: Not comparable
- GLM-5.3 public-lane score: Coming soon
- GLM-5.3-Flash public-lane score: 84 (#14/54)

| Benchmark | GLM-5.3 | GLM-5.3-Flash | Winner |
|-----------|-----------|-----------|--------|
| OfficeQA Pro | Coming soon | 62.4% | Coming soon |
| CharXiv | Coming soon | 89.4% | 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: GLM-5.3
- GLM-5.3 public-lane score: 62.6 (Supported · #39/177)
- GLM-5.3-Flash public-lane score: 60.5 (Supported · #43/177)

| Benchmark | GLM-5.3 | GLM-5.3-Flash | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | 88.1% | 86.4% | GLM-5.3 |
| MMLU-Pro (Vals) | 86.8% | 86.1% | GLM-5.3 |

### Instruction Following

- Winner: Not comparable
- GLM-5.3 public-lane score: Coming soon
- GLM-5.3-Flash public-lane score: Coming soon

| Benchmark | GLM-5.3 | GLM-5.3-Flash | Winner |
|-----------|-----------|-----------|--------|
| Gray Swan IPI (15 attempts) | 31.5% | Coming soon | Coming soon |

## FAQ

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

GLM-5.3 has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

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

The widest category gap is in agentic, where the averages are 67.6 for GLM-5.3 and 55.7 for GLM-5.3-Flash.

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

GLM-5.3 currently has 26 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

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

## Explore More

- [GLM-5.3 profile](/models/glm-5-3)
- [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)