# GLM-5.2 vs GPT-5.5

> Side-by-side benchmark comparison for GLM-5.2 and GPT-5.5 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/glm-5-2-vs-gpt-5-5
- Last updated: September 14, 2026

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

## Quick Verdict

Pick GPT-5.5 if you want the stronger benchmark profile. GLM-5.2 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- GPT-5.5 leads overall 72.14 to 68.19.
- The clearest category separation is in knowledge, where the averages are 60.7 for GLM-5.2 and 72.9 for GPT-5.5.
- The biggest single benchmark swing is LiveCodeBench (Vals) in Coding, with scores of 69.5% and 85.3%.
- GLM-5.2 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.

## Model Snapshot

| Property | GLM-5.2 | GPT-5.5 |
|----------|----------|----------|
| Creator | Z.AI | OpenAI |
| Type | Open Weight | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Overall Score | 68.19 | 72.14 |
| Benchmarks Covered | 25 | 39 |
| Pricing (input/output) | $1.40 / $4.40 | $5.00 / $30.00 |

## Category Breakdown

### Agentic

- Winner: GPT-5.5
- GLM-5.2 public-lane score: 58.5 (Supported · #29/153)
- GPT-5.5 public-lane score: 61.1 (Supported · #17/153)

| Benchmark | GLM-5.2 | GPT-5.5 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 4.6% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 81% | 82% | GPT-5.5 |
| MCP Atlas | 76.8% | 75.3% | GLM-5.2 |
| Toolathlon | 48.2% | 55.6% | GPT-5.5 |
| ResearchClawBench | 20.7% | 17.0% | GLM-5.2 |
| Terminal-Bench 2.1 (Vals) | 67.8% | 76.4% | GPT-5.5 |
| CyberGym | Coming soon | 81.8% | Coming soon |
| BrowseComp | Coming soon | 84.4% | Coming soon |
| OSWorld-Verified | Coming soon | 78.7% | Coming soon |
| τ²-bench results | Coming soon | 98% | Coming soon |
| Gert Labs | Coming soon | 72.93% | Coming soon |
| OSWorld 2.0 | Coming soon | 13.0% | Coming soon |
| JobBench | Coming soon | 42.7% | Coming soon |
| ExploitGym | Coming soon | 13.4% | Coming soon |
| ApprenticeBench | Coming soon | 20% | Coming soon |

### Coding

- Winner: GPT-5.5
- GLM-5.2 public-lane score: 61 (Supported · #19/152)
- GPT-5.5 public-lane score: 67.6 (Supported · #7/152)

| Benchmark | GLM-5.2 | GPT-5.5 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Pro | 62.1% | 58.6% | GLM-5.2 |
| NL2Repo | 48.9% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 81.0% | 82.0% | GPT-5.5 |
| ProgramBench | 63.7% | Coming soon | Coming soon |
| cursorBench32 | 55.0% | 58.4% | GPT-5.5 |
| OpenHarmony Bench | 58.4% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 69.5% | 85.3% | GPT-5.5 |
| SWE-bench (Vals) | 82.8% | 82.6% | GLM-5.2 |
| Vibe Code Bench | Coming soon | 69.85% | Coming soon |
| React Native Evals | Coming soon | 84.7% | Coming soon |
| cursorBench31 | Coming soon | 59.2% | Coming soon |
| FrontierCode 1.1 Main | Coming soon | 43.0% | Coming soon |

### Multimodal & Grounded

- Winner: Coming soon
- GLM-5.2 public-lane score: Coming soon
- GPT-5.5 public-lane score: 71.3 (#19/48)

| Benchmark | GLM-5.2 | GPT-5.5 | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | Coming soon | 81.2% | Coming soon |
| MMMU-Pro w/ Python | Coming soon | 83.2% | Coming soon |
| OfficeQA Pro | Coming soon | 54.1% | Coming soon |

### Reasoning

- Winner: Coming soon
- GLM-5.2 public-lane score: 74.8 (Unranked · 2 rankable rows)
- GPT-5.5 public-lane score: 64 (#13/20)

| Benchmark | GLM-5.2 | GPT-5.5 | Winner |
|-----------|-----------|-----------|--------|
| CritPt | 20.9% | Coming soon | Coming soon |
| MRCR v2 64K-128K | Coming soon | 83.1% | Coming soon |
| MRCR v2 128K-256K | Coming soon | 87.5% | Coming soon |
| ARC-AGI-2 | Coming soon | 85% | Coming soon |
| ARC-AGI-3 | Coming soon | 0.4% | Coming soon |

### Knowledge

- Winner: GPT-5.5
- GLM-5.2 public-lane score: 60.7 (Supported · #35/183)
- GPT-5.5 public-lane score: 72.9 (Supported · #7/183)

| Benchmark | GLM-5.2 | GPT-5.5 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 91.2% | 93.6% | GPT-5.5 |
| GPQA-D | 91.2% | 93.6% | GPT-5.5 |
| HLE | 54.7% | 52.2% | GLM-5.2 |
| HLE w/o tools | 40.5% | 41.4% | GPT-5.5 |
| GPQA Diamond (Vals) | 85.6% | 93.2% | GPT-5.5 |
| MMLU-Pro (Vals) | 86.7% | 88.1% | GPT-5.5 |

### Instruction Following

- Winner: Coming soon
- GLM-5.2 public-lane score: 89.8 (#22/123)
- GPT-5.5 public-lane score: 93.2 (#7/123)

### Mathematics

- Winner: Coming soon
- GLM-5.2 public-lane score: 80.7 (Unranked · 4 rankable rows)
- GPT-5.5 public-lane score: 69.6 (Unranked · 3 rankable rows)

| Benchmark | GLM-5.2 | GPT-5.5 | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | 99.2% | Coming soon | Coming soon |
| HMMT Nov 2025 | 94.4% | Coming soon | Coming soon |
| HMMT Feb 2026 | 92.5% | Coming soon | Coming soon |
| MMAnswerBench | 91.0% | Coming soon | Coming soon |
| FrontierMath (legacy) | Coming soon | 51.7% | Coming soon |
| FrontierMath v2 (Tiers 1-3) | Coming soon | 51.700% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 35.400% | Coming soon |

## FAQ

### Which is better overall, GLM-5.2 or GPT-5.5?

GPT-5.5 is ahead overall on BenchLM right now.

### Where is the biggest gap between GLM-5.2 and GPT-5.5?

The widest category gap is in knowledge, where the averages are 60.7 for GLM-5.2 and 72.9 for GPT-5.5.

### How many benchmarks does GLM-5.2 cover on BenchLM?

GLM-5.2 currently has 25 sourced benchmark scores on BenchLM.

### How many benchmarks does GPT-5.5 cover on BenchLM?

GPT-5.5 currently has 39 sourced benchmark scores on BenchLM.

## Related Comparisons

- [GLM-5.2 vs GLM-5.3](/compare/glm-5-2-vs-glm-5-3)
- [GPT-5.5 vs GLM-5.3](/compare/glm-5-3-vs-gpt-5-5)
- [GLM-5.2 vs GLM-5.3-Flash](/compare/glm-5-2-vs-glm-5-3-flash)
- [GPT-5.5 vs GLM-5.3-Flash](/compare/glm-5-3-flash-vs-gpt-5-5)

## Explore More

- [GLM-5.2 profile](/models/glm-5-2)
- [GPT-5.5 profile](/models/gpt-5-5)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)