# GLM-5 vs GPT-5.6 Luna

> Side-by-side benchmark comparison for GLM-5 and GPT-5.6 Luna across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/glm-5-vs-gpt-5-6-luna
- Last updated: September 24, 2026

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

## Quick Verdict

Pick GPT-5.6 Luna if you want the stronger benchmark profile. GLM-5 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- GPT-5.6 Luna leads overall 65.6 to 54.45.
- The clearest category separation is in mathematics, where the averages are 56.5 for GLM-5 and 94.2 for GPT-5.6 Luna.
- The biggest single benchmark swing is FrontierMath v2 (Tiers 1-3) in Mathematics, with scores of 16.434% and 78.600%.
- GPT-5.6 Luna is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- GPT-5.6 Luna also has the larger context window at 1.05M.

## Model Snapshot

| Property | GLM-5 | GPT-5.6 Luna |
|----------|----------|----------|
| Creator | Z.AI | OpenAI |
| Type | Open Weight | Proprietary |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 200K | 1.05M |
| Overall Score | 54.45 | 65.6 |
| Benchmarks Covered | 36 | 29 |
| Pricing (input/output) | $1.00 / $3.20 | $0.20 / $1.20 |

## Category Breakdown

### Agentic

- Winner: Directional only
- GLM-5 public-lane score: 37.2 (Estimated · #49/105)
- GPT-5.6 Luna public-lane score: 55.3 (Supported · #28/105)

| Benchmark | GLM-5 | GPT-5.6 Luna | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 56.2% | Coming soon | Coming soon |
| Claw-Eval | 57.7% | Coming soon | Coming soon |
| QwenClawBench | 54.1% | Coming soon | Coming soon |
| τ³-bench results | 65.6% | Coming soon | Coming soon |
| DeepPlanning | 14.6% | Coming soon | Coming soon |
| Toolathlon | 38% | 53.4% | GPT-5.6 Luna |
| MCP Atlas | 31.1% | Coming soon | Coming soon |
| MCP-Tasks | 60.8% | Coming soon | Coming soon |
| WideResearch | 69.8% | Coming soon | Coming soon |
| CyberGym | 43.2% | 77.9% | GPT-5.6 Luna |
| Gert Labs | 50.99% | Coming soon | Coming soon |
| Terminal-Bench 3.0 | Coming soon | 14.3% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 84.7% | Coming soon |
| BrowseComp | Coming soon | 83.3% | Coming soon |
| OSWorld 2.0 | Coming soon | 45.6% | Coming soon |
| ExploitGym | Coming soon | 12.4% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 79.0% | Coming soon |
| ApprenticeBench | Coming soon | 7% | Coming soon |

### Coding

- Winner: Directional only
- GLM-5 public-lane score: 39.3 (Estimated · #58/135)
- GPT-5.6 Luna public-lane score: 64.5 (Supported · #9/135)

| Benchmark | GLM-5 | GPT-5.6 Luna | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 77.8% | Coming soon | Coming soon |
| SWE-bench Verified* | 72.8% | Coming soon | Coming soon |
| SWE-bench Pro | 55.1% | 62.7% | GPT-5.6 Luna |
| SWE Multilingual | 73.3% | Coming soon | Coming soon |
| SWE-Rebench | 62.8% | Coming soon | Coming soon |
| React Native Evals | 74.8% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 84.7% | Coming soon |
| DeepSWE | Coming soon | 67.2% | Coming soon |
| FrontierCode 1.1 Extended | Coming soon | 55.1% | Coming soon |
| cursorBench32 | Coming soon | 61.1% | Coming soon |
| VulcanBench v3 | Coming soon | 85.5% | Coming soon |
| SWE-bench (Vals) | Coming soon | 93.0% | Coming soon |

### Reasoning

- Winner: Not comparable
- GLM-5 public-lane score: 53.2 (Unranked · 4 rankable rows)
- GPT-5.6 Luna public-lane score: 54.7 (#18/19)

| Benchmark | GLM-5 | GPT-5.6 Luna | Winner |
|-----------|-----------|-----------|--------|
| LongBench v2 | 60.8% | Coming soon | Coming soon |
| AI-Needle | 63.3% | Coming soon | Coming soon |
| ARC-AGI-2 | Coming soon | 59.5% | Coming soon |
| ARC-AGI-3 | Coming soon | 0.2% | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- GLM-5 public-lane score: Coming soon
- GPT-5.6 Luna public-lane score: 67.1 (#22/50)

| Benchmark | GLM-5 | GPT-5.6 Luna | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | Coming soon | 78.4% | Coming soon |
| MMMU-Pro w/ Python | Coming soon | 79.5% | Coming soon |

### Knowledge

- Winner: Directional only
- GLM-5 public-lane score: 47.1 (Estimated · #68/158)
- GPT-5.6 Luna public-lane score: 64.6 (Supported · #22/158)

| Benchmark | GLM-5 | GPT-5.6 Luna | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 86% | 92.3% | GPT-5.6 Luna |
| GPQA-D | 86.0% | 92.3% | GPT-5.6 Luna |
| SuperGPQA | 66.8% | Coming soon | Coming soon |
| MMLU-Pro | 85.7% | Coming soon | Coming soon |
| MMLU-Pro (Arcee) | 85.8% | Coming soon | Coming soon |
| HLE | 50.4% | Coming soon | Coming soon |
| HealthBench Professional | Coming soon | 55.7% | Coming soon |
| HealthBench Hard | Coming soon | 32.0% | Coming soon |
| GPQA Diamond (Vals) | Coming soon | 91.7% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 86.0% | Coming soon |

### Multilingual

- Winner: Not comparable
- GLM-5 public-lane score: 48.7 (#6/12)
- GPT-5.6 Luna public-lane score: Coming soon

| Benchmark | GLM-5 | GPT-5.6 Luna | Winner |
|-----------|-----------|-----------|--------|
| MMLU-ProX | 83.1% | Coming soon | Coming soon |
| NOVA-63 | 55.1% | Coming soon | Coming soon |

### Instruction Following

- Winner: Not comparable
- GLM-5 public-lane score: 87.2 (#32/124)
- GPT-5.6 Luna public-lane score: Coming soon

| Benchmark | GLM-5 | GPT-5.6 Luna | Winner |
|-----------|-----------|-----------|--------|
| IFEval | 92.6% | Coming soon | Coming soon |

### Mathematics

- Winner: Not comparable
- GLM-5 public-lane score: 56.5 (#7/7)
- GPT-5.6 Luna public-lane score: 94.2 (Unranked · 3 rankable rows)

| Benchmark | GLM-5 | GPT-5.6 Luna | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | 95.8% | Coming soon | Coming soon |
| AIME25 (Arcee) | 93.3% | Coming soon | Coming soon |
| HMMT Feb 2025 | 97.5% | Coming soon | Coming soon |
| HMMT Nov 2025 | 96.9% | Coming soon | Coming soon |
| HMMT Feb 2026 | 86.4% | Coming soon | Coming soon |
| MMAnswerBench | 82.5% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 16.434% | 78.600% | GPT-5.6 Luna |
| FrontierMath v2 (Tier 4) | 2.100% | 58.500% | GPT-5.6 Luna |
| FrontierMath (legacy) | Coming soon | 78.6% | Coming soon |

## FAQ

### Which is better overall, GLM-5 or GPT-5.6 Luna?

GPT-5.6 Luna is ahead overall on BenchLM right now.

### Where is the biggest gap between GLM-5 and GPT-5.6 Luna?

The widest category gap is in mathematics, where the averages are 56.5 for GLM-5 and 94.2 for GPT-5.6 Luna.

### How many benchmarks does GLM-5 cover on BenchLM?

GLM-5 currently has 36 sourced benchmark scores on BenchLM.

### How many benchmarks does GPT-5.6 Luna cover on BenchLM?

GPT-5.6 Luna currently has 29 sourced benchmark scores on BenchLM.

## Related Comparisons

- [GLM-5 vs GLM-5.3](/compare/glm-5-vs-glm-5-3)
- [GPT-5.6 Luna vs GLM-5.3](/compare/glm-5-3-vs-gpt-5-6-luna)
- [GLM-5 vs GLM-5.2](/compare/glm-5-vs-glm-5-2)
- [GPT-5.6 Luna vs GLM-5.2](/compare/glm-5-2-vs-gpt-5-6-luna)

## Explore More

- [GLM-5 profile](/models/glm-5)
- [GPT-5.6 Luna profile](/models/gpt-5-6-luna)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)