# Claude Opus 4.8 vs GLM-5.3

> Side-by-side benchmark comparison for Claude Opus 4.8 and GLM-5.3 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-opus-4-8-vs-glm-5-3
- Last updated: September 28, 2026

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

## Quick Verdict

Pick Claude Opus 4.8 if you want the stronger benchmark profile. GLM-5.3 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Claude Opus 4.8 leads overall 70.39 to 65.44.
- The clearest category separation is in reasoning, where the averages are 59.1 for Claude Opus 4.8 and 77.1 for GLM-5.3.
- The biggest single benchmark swing is Terminal-Bench 2.1 in Agentic, with scores of 74.6% and 88.2%.
- GLM-5.3 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.

## Model Snapshot

| Property | Claude Opus 4.8 | GLM-5.3 |
|----------|----------|----------|
| Creator | Anthropic | Z.AI |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Overall Score | 70.39 | 65.44 |
| Benchmarks Covered | 38 | 24 |
| Pricing (input/output) | $5.00 / $25.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: GLM-5.3
- Claude Opus 4.8 public-lane score: 61.6 (Supported · #15/117)
- GLM-5.3 public-lane score: 67.4 (Supported · #9/117)

| Benchmark | Claude Opus 4.8 | GLM-5.3 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 21.1% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 74.6% | 88.2% | GLM-5.3 |
| BrowseComp | 84.3% | Coming soon | Coming soon |
| DeepSearchQA | 93.1% | Coming soon | Coming soon |
| OSWorld-Verified | 83.4% | Coming soon | Coming soon |
| Finance Agent v2 | 53.9% | Coming soon | Coming soon |
| MCP Atlas | 82.2% | Coming soon | Coming soon |
| Toolathlon | 59.9% | Coming soon | Coming soon |
| Gert Labs | 72.97% | Coming soon | Coming soon |
| ResearchClawBench | 21.1% | Coming soon | Coming soon |
| OSWorld 2.0 | 20.6% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 71.9% | 71.5% | Claude Opus 4.8 |
| terminalBench3 | Coming soon | 28.3% | Coming soon |
| CyberGym | Coming soon | 84.5% | 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: Claude Opus 4.8
- Claude Opus 4.8 public-lane score: 62.2 (Supported · #14/142)
- GLM-5.3 public-lane score: 56.8 (Supported · #24/142)

| Benchmark | Claude Opus 4.8 | GLM-5.3 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 88.6% | Coming soon | Coming soon |
| SWE-bench Pro | 69.2% | Coming soon | Coming soon |
| SWE Multilingual | 84.4% | Coming soon | Coming soon |
| SWE Multimodal | 38.4% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 74.6% | 88.2% | GLM-5.3 |
| cursorBench31 | 58.4% | Coming soon | Coming soon |
| cursorBench32 | 62.3% | Coming soon | Coming soon |
| FrontierCode 1.1 Main | 46.5% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 87.8% | 80.5% | Claude Opus 4.8 |
| SWE-bench (Vals) | 88.6% | 95.4% | GLM-5.3 |
| terminalBench3 | Coming soon | 28.3% | Coming soon |
| DeepSWE | Coming soon | 66.9% | Coming soon |
| NL2Repo | Coming soon | 58% | 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 |
| OpenHarmony Bench | Coming soon | 60.8% | Coming soon |
| FrontierSWE v2 | Coming soon | 30.2% | Coming soon |

### Reasoning

- Winner: Directional only
- Claude Opus 4.8 public-lane score: 59.1 (#22/27)
- GLM-5.3 public-lane score: 77.1 (#11/27)

| Benchmark | Claude Opus 4.8 | GLM-5.3 | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 72.1% | Coming soon | Coming soon |
| ARC-AGI-3 | 1.5% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Claude Opus 4.8 public-lane score: 87.7 (#7/50)
- GLM-5.3 public-lane score: Coming soon

| Benchmark | Claude Opus 4.8 | GLM-5.3 | Winner |
|-----------|-----------|-----------|--------|
| OfficeQA Pro | 66.2% | Coming soon | Coming soon |
| ScreenSpot Pro | 87.9% | Coming soon | Coming soon |
| CharXiv | 89.9% | Coming soon | Coming soon |
| CharXiv w/o tools | 80.5% | Coming soon | Coming soon |

### Knowledge

- Winner: Claude Opus 4.8
- Claude Opus 4.8 public-lane score: 70.1 (Supported · #12/168)
- GLM-5.3 public-lane score: 61.9 (Supported · #35/168)

| Benchmark | Claude Opus 4.8 | GLM-5.3 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 93.6% | Coming soon | Coming soon |
| GPQA-D | 93.6% | Coming soon | Coming soon |
| HLE | 57.9% | Coming soon | Coming soon |
| HLE w/o tools | 49.8% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 92.4% | 88.1% | Claude Opus 4.8 |
| MMLU-Pro (Vals) | 89.6% | 86.8% | Claude Opus 4.8 |

### Multilingual

- Winner: Not comparable
- Claude Opus 4.8 public-lane score: Coming soon
- GLM-5.3 public-lane score: Coming soon

| Benchmark | Claude Opus 4.8 | GLM-5.3 | Winner |
|-----------|-----------|-----------|--------|
| INCLUDE | 87.6% | Coming soon | Coming soon |

### Instruction Following

- Winner: Not comparable
- Claude Opus 4.8 public-lane score: 74 (#60/124)
- GLM-5.3 public-lane score: Coming soon

### Mathematics

- Winner: Not comparable
- Claude Opus 4.8 public-lane score: 65.2 (#2/7)
- GLM-5.3 public-lane score: Coming soon

| Benchmark | Claude Opus 4.8 | GLM-5.3 | Winner |
|-----------|-----------|-----------|--------|
| USAMO 2026 | 96.7% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 47.241% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 31.250% | Coming soon | Coming soon |

## FAQ

### Which is better overall, Claude Opus 4.8 or GLM-5.3?

Claude Opus 4.8 is ahead overall on BenchLM right now.

### Where is the biggest gap between Claude Opus 4.8 and GLM-5.3?

The widest category gap is in reasoning, where the averages are 59.1 for Claude Opus 4.8 and 77.1 for GLM-5.3.

### How many benchmarks does Claude Opus 4.8 cover on BenchLM?

Claude Opus 4.8 currently has 38 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

- [Claude Opus 4.8 vs GLM-5.2](/compare/claude-opus-4-8-vs-glm-5-2)
- [GLM-5.3 vs GLM-5.2](/compare/glm-5-2-vs-glm-5-3)
- [Claude Opus 4.8 vs GLM-5.3-Flash](/compare/claude-opus-4-8-vs-glm-5-3-flash)
- [GLM-5.3 vs GLM-5.3-Flash](/compare/glm-5-3-vs-glm-5-3-flash)

## Explore More

- [Claude Opus 4.8 profile](/models/claude-opus-4-8)
- [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)