# Claude Sonnet 5 vs GLM-5.3-Flash

> Side-by-side benchmark comparison for Claude Sonnet 5 and GLM-5.3-Flash across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-sonnet-5-vs-glm-5-3-flash
- Last updated: September 18, 2026

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

## Quick Verdict

Pick Claude Sonnet 5 if you want the stronger benchmark profile. GLM-5.3-Flash only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Claude Sonnet 5 leads overall 69.68 to 66.06.
- The clearest category separation is in coding, where the averages are 63.9 for Claude Sonnet 5 and 58.1 for GLM-5.3-Flash.
- The biggest single benchmark swing is SWE-bench (Vals) in Coding, with scores of 79.6% and 92.0%.
- GLM-5.3-Flash is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.

## Model Snapshot

| Property | Claude Sonnet 5 | GLM-5.3-Flash |
|----------|----------|----------|
| Creator | Anthropic | Z.AI |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Overall Score | 69.68 | 66.06 |
| Benchmarks Covered | 26 | 19 |
| Pricing (input/output) | $2.00 / $10.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Claude Sonnet 5
- Claude Sonnet 5 public-lane score: 65.9 (Supported · #11/154)
- GLM-5.3-Flash public-lane score: 60.2 (Supported · #19/154)

| Benchmark | Claude Sonnet 5 | GLM-5.3-Flash | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 14.6% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 80.4% | Coming soon | Coming soon |
| BrowseComp | 84.7% | Coming soon | Coming soon |
| HLE w/ tools | 57.4% | 55.3% | Claude Sonnet 5 |
| OSWorld-Verified | 81.2% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 74.5% | 62.9% | Claude Sonnet 5 |
| ApprenticeBench | 16% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 84.3% | Coming soon |
| Toolathlon-Verified | Coming soon | 78.4% | Coming soon |
| AutomationBench | Coming soon | 48.8% | Coming soon |
| Agents' Last Exam | Coming soon | 26.3% | Coming soon |

### Coding

- Winner: Claude Sonnet 5
- Claude Sonnet 5 public-lane score: 63.9 (Supported · #13/154)
- GLM-5.3-Flash public-lane score: 58.1 (Supported · #28/154)

| Benchmark | Claude Sonnet 5 | GLM-5.3-Flash | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 85.2% | Coming soon | Coming soon |
| SWE-bench Pro | 63.2% | Coming soon | Coming soon |
| SWE Multilingual | 78.3% | Coming soon | Coming soon |
| SWE Multimodal | 28.1% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 80.4% | Coming soon | Coming soon |
| FrontierCode 1.1 Main | 42.7% | Coming soon | Coming soon |
| cursorBench32 | 61.5% | Coming soon | Coming soon |
| VulcanBench CII v1 | 89.2% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 82.4% | 80.5% | Claude Sonnet 5 |
| SWE-bench (Vals) | 79.6% | 92.0% | GLM-5.3-Flash |
| cursorBench40 | 34.1% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 84.3% | Coming soon |
| DeepSWE | Coming soon | 63.4% | Coming soon |
| NL2Repo | Coming soon | 56.3% | Coming soon |
| OpenHarmony Bench | Coming soon | 57.3% | Coming soon |

### Multimodal & Grounded

- Winner: Coming soon
- Claude Sonnet 5 public-lane score: 77.4 (#14/48)
- GLM-5.3-Flash public-lane score: 80.4 (#10/48)

| Benchmark | Claude Sonnet 5 | GLM-5.3-Flash | Winner |
|-----------|-----------|-----------|--------|
| CharXiv | 88.3% | 89.4% | GLM-5.3-Flash |
| CharXiv w/o tools | 77% | Coming soon | Coming soon |
| OfficeQA Pro | Coming soon | 62.4% | Coming soon |
| Chartography (tools) | Coming soon | 78.0% | Coming soon |
| BabyVision | Coming soon | 53.4% | Coming soon |
| MMVU | Coming soon | 80.5% | Coming soon |

### Reasoning

- Winner: Coming soon
- Claude Sonnet 5 public-lane score: 77.4 (Unranked · 2 rankable rows)
- GLM-5.3-Flash public-lane score: Coming soon

### Knowledge

- Winner: Tie
- Claude Sonnet 5 public-lane score: 66.5 (Supported · #20/184)
- GLM-5.3-Flash public-lane score: 66.1 (Supported · #21/184)

| Benchmark | Claude Sonnet 5 | GLM-5.3-Flash | Winner |
|-----------|-----------|-----------|--------|
| HLE | 57.4% | Coming soon | Coming soon |
| HLE w/o tools | 43.2% | Coming soon | Coming soon |
| HLE-Verified | 31.0% | Coming soon | Coming soon |
| LABBench2 | 80.1% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 88.9% | 86.4% | Claude Sonnet 5 |
| MMLU-Pro (Vals) | 87.5% | 86.1% | Claude Sonnet 5 |

## FAQ

### Which is better overall, Claude Sonnet 5 or GLM-5.3-Flash?

Claude Sonnet 5 is ahead overall on BenchLM right now.

### Where is the biggest gap between Claude Sonnet 5 and GLM-5.3-Flash?

The widest category gap is in coding, where the averages are 63.9 for Claude Sonnet 5 and 58.1 for GLM-5.3-Flash.

### How many benchmarks does Claude Sonnet 5 cover on BenchLM?

Claude Sonnet 5 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 19 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Claude Sonnet 5 vs GLM-5.3](/compare/claude-sonnet-5-vs-glm-5-3)
- [GLM-5.3-Flash vs GLM-5.3](/compare/glm-5-3-vs-glm-5-3-flash)
- [Claude Sonnet 5 vs GLM-5.2](/compare/claude-sonnet-5-vs-glm-5-2)
- [GLM-5.3-Flash vs GLM-5.2](/compare/glm-5-2-vs-glm-5-3-flash)

## Explore More

- [Claude Sonnet 5 profile](/models/claude-sonnet-5)
- [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)