# GLM-5.3-Flash vs GPT-5.4 mini

> Side-by-side benchmark comparison for GLM-5.3-Flash and GPT-5.4 mini across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/glm-5-3-flash-vs-gpt-5-4-mini
- Last updated: October 10, 2026

- Shared sourced benchmarks: 5
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

GLM-5.3-Flash 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-Flash has the higher overall point estimate 57.36 to 53.87. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in reasoning, where the averages are 81.1 for GLM-5.3-Flash and 43.8 for GPT-5.4 mini.
- The biggest single benchmark swing is SWE-bench (Vals) in Coding, with scores of 92.0% and 73.0%.
- GLM-5.3-Flash is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- GLM-5.3-Flash also has the larger context window at 1M.

## Model Snapshot

| Property | GLM-5.3-Flash | GPT-5.4 mini |
|----------|----------|----------|
| Creator | Z.AI | OpenAI |
| Type | Open Weight | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 400K |
| Overall Score | 57.36 | 53.87 |
| Benchmarks Covered | 21 | 22 |
| Pricing (input/output) | $0.00 / $0.00 | $0.75 / $4.50 |

## Category Breakdown

### Agentic

- Winner: GLM-5.3-Flash
- GLM-5.3-Flash public-lane score: 55.7 (Supported · #34/123)
- GPT-5.4 mini public-lane score: 34.4 (Supported · #77/123)

| Benchmark | GLM-5.3-Flash | GPT-5.4 mini | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 84.3% | Coming soon | Coming soon |
| Toolathlon-Verified | 78.4% | Coming soon | Coming soon |
| AutomationBench | 48.8% | Coming soon | Coming soon |
| Agents' Last Exam | 26.3% | Coming soon | Coming soon |
| HLE w/ tools | 55.3% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 62.9% | 54.7% | GLM-5.3-Flash |
| Terminal-Bench 2.0 | Coming soon | 60% | Coming soon |
| OSWorld-Verified | Coming soon | 72.1% | Coming soon |
| MCP Atlas | Coming soon | 57.7% | Coming soon |
| Toolathlon | Coming soon | 42.9% | Coming soon |
| τ²-bench results | Coming soon | 93.4% | Coming soon |

### Coding

- Winner: GLM-5.3-Flash
- GLM-5.3-Flash public-lane score: 49.3 (Supported · #42/146)
- GPT-5.4 mini public-lane score: 35.8 (Supported · #73/146)

| Benchmark | GLM-5.3-Flash | GPT-5.4 mini | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 84.3% | Coming soon | Coming soon |
| DeepSWE | 63.4% | Coming soon | Coming soon |
| NL2Repo | 56.3% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 80.5% | 81.5% | GPT-5.4 mini |
| SWE-bench (Vals) | 92.0% | 73.0% | GLM-5.3-Flash |
| OpenHarmony Bench | 57.3% | Coming soon | Coming soon |
| FrontierSWE v2 | 18.1% | Coming soon | Coming soon |
| Bug Hunt Bench | 17.7 fixes | Coming soon | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 60.0% | Coming soon |
| Vibe Code Bench | Coming soon | 47.97% | Coming soon |
| FrontierCode 1.1 Main | Coming soon | 27.0% | Coming soon |

### Reasoning

- Winner: Not comparable
- GLM-5.3-Flash public-lane score: 81.1 (#11/28)
- GPT-5.4 mini public-lane score: 43.8 (Unranked · 4 rankable rows)

| Benchmark | GLM-5.3-Flash | GPT-5.4 mini | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-1 | Coming soon | 63.70% | Coming soon |
| ARC-AGI-2 | Coming soon | 18.9% | Coming soon |

### Multimodal & Grounded

- Winner: Directional only
- GLM-5.3-Flash public-lane score: 84 (#14/54)
- GPT-5.4 mini public-lane score: 73.8 (#28/54)

| Benchmark | GLM-5.3-Flash | GPT-5.4 mini | Winner |
|-----------|-----------|-----------|--------|
| OfficeQA Pro | 62.4% | Coming soon | Coming soon |
| CharXiv | 89.4% | Coming soon | Coming soon |
| Chartography (tools) | 78.0% | Coming soon | Coming soon |
| BabyVision | 53.4% | Coming soon | Coming soon |
| MMVU | 80.5% | Coming soon | Coming soon |
| MMMU-Pro | Coming soon | 76.6% | Coming soon |
| MMMU-Pro w/ Python | Coming soon | 78% | Coming soon |

### Knowledge

- Winner: GLM-5.3-Flash
- GLM-5.3-Flash public-lane score: 60.5 (Supported · #43/177)
- GPT-5.4 mini public-lane score: 50.4 (Supported · #74/177)

| Benchmark | GLM-5.3-Flash | GPT-5.4 mini | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | 86.4% | 83.1% | GLM-5.3-Flash |
| MMLU-Pro (Vals) | 86.1% | 84.6% | GLM-5.3-Flash |
| GPQA | Coming soon | 88% | Coming soon |
| HLE | Coming soon | 41.5% | Coming soon |
| HLE w/o tools | Coming soon | 28.2% | Coming soon |

### Instruction Following

- Winner: Not comparable
- GLM-5.3-Flash public-lane score: Coming soon
- GPT-5.4 mini public-lane score: 89.9 (#27/127)

### Mathematics

- Winner: Not comparable
- GLM-5.3-Flash public-lane score: Coming soon
- GPT-5.4 mini public-lane score: 44.8 (Unranked · 2 rankable rows)

| Benchmark | GLM-5.3-Flash | GPT-5.4 mini | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | Coming soon | 28.280% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 2.080% | Coming soon |

## FAQ

### Which is better overall, GLM-5.3-Flash or GPT-5.4 mini?

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

### Where is the biggest gap between GLM-5.3-Flash and GPT-5.4 mini?

The widest category gap is in reasoning, where the averages are 81.1 for GLM-5.3-Flash and 43.8 for GPT-5.4 mini.

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

GLM-5.3-Flash currently has 21 sourced benchmark scores on BenchLM.

### How many benchmarks does GPT-5.4 mini cover on BenchLM?

GPT-5.4 mini currently has 22 sourced benchmark scores on BenchLM.

## Related Comparisons

- [GLM-5.3-Flash vs GLM-5.3](/compare/glm-5-3-vs-glm-5-3-flash)
- [GPT-5.4 mini vs GLM-5.3](/compare/glm-5-3-vs-gpt-5-4-mini)
- [GLM-5.3-Flash vs GLM-5.2](/compare/glm-5-2-vs-glm-5-3-flash)
- [GPT-5.4 mini vs GLM-5.2](/compare/glm-5-2-vs-gpt-5-4-mini)

## Explore More

- [GLM-5.3-Flash profile](/models/glm-5-3-flash)
- [GPT-5.4 mini profile](/models/gpt-5-4-mini)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)