# Claude Sonnet 5.5 vs GLM-5.2

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

- Canonical page: https://benchlm.ai/compare/claude-sonnet-5-5-vs-glm-5-2
- Last updated: September 28, 2026

- Shared sourced benchmarks: 3
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.7

## Quick Verdict

Evidence is too thin for a benchmark verdict: Claude Sonnet 5.5 and GLM-5.2 share only 3 sourced benchmark rows.

## Summary

- Only 3 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- GLM-5.2 has the lower published output-token price.

## Model Snapshot

| Property | Claude Sonnet 5.5 | GLM-5.2 |
|----------|----------|----------|
| Creator | Anthropic | Z.AI |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Independent public score (not head-to-head) | 80.49 | 62.62 |
| Benchmarks Covered | 47 | 25 |
| Pricing (input/output) | $2.00 / $10.00 | $1.40 / $4.40 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Claude Sonnet 5.5 public-lane score: 66.1 (Supported · #10/111)
- GLM-5.2 public-lane score: 55.9 (Supported · #26/111)

| Benchmark | Claude Sonnet 5.5 | GLM-5.2 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 4.0 | 70.60% | Coming soon | Coming soon |
| HLE w/ tools | 64.5% | Coming soon | Coming soon |
| DRACO | 87.0% | Coming soon | Coming soon |
| Terminal-Bench-Science 0.1 | 59.9% | Coming soon | Coming soon |
| LAB all-pass (Harvey held-out) | 10.0% | Coming soon | Coming soon |
| LAB criterion-pass (Harvey held-out) | 93.1% | Coming soon | Coming soon |
| Toolathlon Verified Pass@3 | 85.2% | Coming soon | Coming soon |
| Toolathlon Verified Pass³ | 68.5% | Coming soon | Coming soon |
| Toolathlon Verified avg. turns | 31.6 turns | Coming soon | Coming soon |
| AutomationBench (Zapier 1.0.6) | 44.7% | Coming soon | Coming soon |
| Toolathlon-Verified | 77.8% | Coming soon | Coming soon |
| Terminal-Bench 3.0 | Coming soon | 4.6% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 81.0% | Coming soon |
| MCP Atlas | Coming soon | 76.8% | Coming soon |
| Toolathlon | Coming soon | 48.2% | Coming soon |
| ResearchClawBench | Coming soon | 20.7% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 67.8% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Claude Sonnet 5.5 public-lane score: 79.6 (Estimated · #3/136)
- GLM-5.2 public-lane score: 56.1 (Supported · #23/136)

| Benchmark | Claude Sonnet 5.5 | GLM-5.2 | Winner |
|-----------|-----------|-----------|--------|
| FrontierCode 1.1 Main | 46.2% | Coming soon | Coming soon |
| cursorBench40 | 55.5% | Coming soon | Coming soon |
| SWE-bench Pro | 81.3% | 62.1% | Claude Sonnet 5.5 |
| SWE Multilingual | 90.3% | Coming soon | Coming soon |
| SWE Multimodal | 54.3% | Coming soon | Coming soon |
| DeepSWE | 71.0% | Coming soon | Coming soon |
| FrontierCode 1.1 Extended | 59.1% | Coming soon | Coming soon |
| ProgramBench | 79.7% | 63.7% | Claude Sonnet 5.5 |
| FrontierSWE v2 | 61.9% | Coming soon | Coming soon |
| NL2Repo | Coming soon | 48.9% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 81.0% | Coming soon |
| cursorBench32 | Coming soon | 55.0% | Coming soon |
| OpenHarmony Bench | Coming soon | 58.4% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 69.5% | Coming soon |
| SWE-bench (Vals) | Coming soon | 82.8% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Claude Sonnet 5.5 public-lane score: 79.2 (#7/27)
- GLM-5.2 public-lane score: 76.1 (Unranked · 2 rankable rows)

| Benchmark | Claude Sonnet 5.5 | GLM-5.2 | Winner |
|-----------|-----------|-----------|--------|
| CritPt | Coming soon | 20.9% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Claude Sonnet 5.5 public-lane score: 83.3 (Unranked · 7 rankable rows)
- GLM-5.2 public-lane score: Coming soon

| Benchmark | Claude Sonnet 5.5 | GLM-5.2 | Winner |
|-----------|-----------|-----------|--------|
| Chartography (no tools) | 61.6% | Coming soon | Coming soon |
| Chartography (tools) | 90.2% | Coming soon | Coming soon |
| BenchCAD Vision2Code (no tools) | 0.747 | Coming soon | Coming soon |
| BenchCAD Vision2Code (tools) | 0.963 | Coming soon | Coming soon |
| Biomedical image analysis | 72.2% | Coming soon | Coming soon |
| OfficeQA | 76.9% | Coming soon | Coming soon |
| OfficeQA Pro | 65.6% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Claude Sonnet 5.5 public-lane score: 80.9 (Supported · #6/160)
- GLM-5.2 public-lane score: 57.2 (Supported · #42/160)

| Benchmark | Claude Sonnet 5.5 | GLM-5.2 | Winner |
|-----------|-----------|-----------|--------|
| HealthBench (raw) | 69.4% | Coming soon | Coming soon |
| HealthBench (length-adjusted) | 65.4% | Coming soon | Coming soon |
| HealthBench Professional (raw) | 77.1% | Coming soon | Coming soon |
| HealthBench Professional | 69.2% | Coming soon | Coming soon |
| BioMysteryBench (human-solvable) | 89.2% | Coming soon | Coming soon |
| BioMysteryBench (human-difficult) | 44.7% | Coming soon | Coming soon |
| SpatialBench Verified | 72.5% | Coming soon | Coming soon |
| SingleCellBench | 59.1% | Coming soon | Coming soon |
| Protein Design | 51.0% | Coming soon | Coming soon |
| Morphology-to-molecule matching | 25.0% | Coming soon | Coming soon |
| Medicinal chemistry | 65.3% | Coming soon | Coming soon |
| Protein Design library ranking | 54.8% | Coming soon | Coming soon |
| De novo protein-binder design | 82.3% | Coming soon | Coming soon |
| Protocols (troubleshooting) | 67.3% | Coming soon | Coming soon |
| Protocols (understanding) | 66.6% | Coming soon | Coming soon |
| HLE w/o tools | 56.9% | 40.5% | Claude Sonnet 5.5 |
| GPQA | Coming soon | 91.2% | Coming soon |
| GPQA-D | Coming soon | 91.2% | Coming soon |
| HLE | Coming soon | 54.7% | Coming soon |
| GPQA Diamond (Vals) | Coming soon | 85.6% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 86.7% | Coming soon |

### Multilingual

- Winner: Insufficient shared evidence
- Claude Sonnet 5.5 public-lane score: Coming soon
- GLM-5.2 public-lane score: Coming soon

| Benchmark | Claude Sonnet 5.5 | GLM-5.2 | Winner |
|-----------|-----------|-----------|--------|
| GMMLU | 92.1% | Coming soon | Coming soon |
| MILU | 91.6% | Coming soon | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Claude Sonnet 5.5 public-lane score: Coming soon
- GLM-5.2 public-lane score: 88.5 (#23/124)

### Mathematics

- Winner: Insufficient shared evidence
- Claude Sonnet 5.5 public-lane score: Coming soon
- GLM-5.2 public-lane score: 80.7 (Unranked · 4 rankable rows)

| Benchmark | Claude Sonnet 5.5 | GLM-5.2 | Winner |
|-----------|-----------|-----------|--------|
| ArXivMath Aug. 2026 (no tools) | 86.8% | Coming soon | Coming soon |
| ArXivMath Aug. 2026 (tools) | 95.2% | Coming soon | Coming soon |
| AIME26 | Coming soon | 99.2% | Coming soon |
| HMMT Nov 2025 | Coming soon | 94.4% | Coming soon |
| HMMT Feb 2026 | Coming soon | 92.5% | Coming soon |
| MMAnswerBench | Coming soon | 91.0% | Coming soon |

## FAQ

### Is there enough evidence to pick between Claude Sonnet 5.5 and GLM-5.2?

Not yet. The models share only 3 sourced benchmark rows, so this mirror reports the available measurements and metadata without naming a broad winner.

### What can I compare safely on this page?

Published pricing, context windows, model type, and individual shared benchmark rows are directly comparable. Independent overall scores and non-overlapping benchmark coverage are labeled separately and should not be read as a controlled head-to-head result.

## Related Comparisons

- [Claude Sonnet 5.5 vs GLM-5.3](/compare/claude-sonnet-5-5-vs-glm-5-3)
- [GLM-5.2 vs GLM-5.3](/compare/glm-5-2-vs-glm-5-3)
- [Claude Sonnet 5.5 vs GLM-5.3-Flash](/compare/claude-sonnet-5-5-vs-glm-5-3-flash)
- [GLM-5.2 vs GLM-5.3-Flash](/compare/glm-5-2-vs-glm-5-3-flash)

## Explore More

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