# Claude Opus 5 vs GLM-5.3-Flash

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

- Canonical page: https://benchlm.ai/compare/claude-opus-5-vs-glm-5-3-flash
- Last updated: October 10, 2026

- Shared sourced benchmarks: 13
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Claude Opus 5 leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- Claude Opus 5 has the higher overall point estimate 79.44 to 57.36. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in agentic, where the averages are 77.7 for Claude Opus 5 and 55.7 for GLM-5.3-Flash.
- The biggest single benchmark swing is FrontierSWE v2 in Coding, with scores of 52.0% and 18.1%.
- GLM-5.3-Flash is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- GLM-5.3-Flash also has the larger context window at 1M.

## Model Snapshot

| Property | Claude Opus 5 | GLM-5.3-Flash |
|----------|----------|----------|
| Creator | Anthropic | Z.AI |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | null | 1M |
| Overall Score | 79.44 | 57.36 |
| Benchmarks Covered | 77 | 21 |
| Pricing (input/output) | $5.00 / $25.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Claude Opus 5
- Claude Opus 5 public-lane score: 77.7 (Supported · #3/123)
- GLM-5.3-Flash public-lane score: 55.7 (Supported · #34/123)

| Benchmark | Claude Opus 5 | GLM-5.3-Flash | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 42.7% | Coming soon | Coming soon |
| BrowseComp | 90.8% | Coming soon | Coming soon |
| HLE w/ tools | 64.7% | 55.3% | Claude Opus 5 |
| DeepSearchQA | 95.0% | Coming soon | Coming soon |
| DRACO | 88.6% | Coming soon | Coming soon |
| BrowseComp (10-agent, prerelease) | 93.6% | Coming soon | Coming soon |
| OSWorld 2.0 | 70.6% | Coming soon | Coming soon |
| MCP Atlas | 85.8% | Coming soon | Coming soon |
| MCP-Atlas claim coverage | 89.1% | Coming soon | Coming soon |
| LAB all-pass (Anthropic harness) | 23.58% | Coming soon | Coming soon |
| LAB criterion-pass (Anthropic harness) | 93.74% | Coming soon | Coming soon |
| LAB all-pass (Harvey held-out) | 11.7% | Coming soon | Coming soon |
| LAB criterion-pass (Harvey held-out) | 94.1% | Coming soon | Coming soon |
| Toolathlon-Verified | 80.6% | 78.4% | Claude Opus 5 |
| Toolathlon Verified Pass@3 | 87.0% | Coming soon | Coming soon |
| Toolathlon Verified Pass³ | 73.1% | Coming soon | Coming soon |
| Toolathlon Verified avg. turns | 23.5 turns | Coming soon | Coming soon |
| AutomationBench | 26.0% | 48.8% | GLM-5.3-Flash |
| Terminal-Bench 2.1 (Vals) | 84.6% | 62.9% | Claude Opus 5 |
| ApprenticeBench | 36% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 84.3% | Coming soon |
| Agents' Last Exam | Coming soon | 26.3% | Coming soon |

### Coding

- Winner: Claude Opus 5
- Claude Opus 5 public-lane score: 71.1 (Supported · #7/146)
- GLM-5.3-Flash public-lane score: 49.3 (Supported · #42/146)

| Benchmark | Claude Opus 5 | GLM-5.3-Flash | Winner |
|-----------|-----------|-----------|--------|
| Bug Hunt Bench | 27.0 fixes | 17.7 fixes | Claude Opus 5 |
| SWE-bench Verified | 96% | Coming soon | Coming soon |
| SWE-bench Pro | 79.2% | Coming soon | Coming soon |
| SWE Multilingual | 89.5% | Coming soon | Coming soon |
| SWE Multimodal | 59.4% | Coming soon | Coming soon |
| DeepSWE | 68.8% | 63.4% | Claude Opus 5 |
| FrontierCode 1.1 Main | 53.4% | Coming soon | Coming soon |
| FrontierCode 1.1 Extended | 63.6% | Coming soon | Coming soon |
| FrontierSWE v2 | 52.0% | 18.1% | Claude Opus 5 |
| ProgramBench (episode 1) | 83.0% | Coming soon | Coming soon |
| ProgramBench | 93.0% | Coming soon | Coming soon |
| CursorBench 3.2 | 70.0% | Coming soon | Coming soon |
| VulcanBench v3 | 87.0% | Coming soon | Coming soon |
| VulcanBench CII v1 | 96.4% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 89.0% | 80.5% | Claude Opus 5 |
| SWE-bench (Vals) | 97.0% | 92.0% | Claude Opus 5 |
| CursorBench 4.0 | 46.6% | Coming soon | Coming soon |
| PostTrainBench v1.1 | 35.0% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 84.3% | Coming soon |
| NL2Repo | Coming soon | 56.3% | Coming soon |
| OpenHarmony Bench | Coming soon | 57.3% | Coming soon |

### Reasoning

- Winner: Directional only
- Claude Opus 5 public-lane score: 81.1 (#10/28)
- GLM-5.3-Flash public-lane score: 81.1 (#11/28)

| Benchmark | Claude Opus 5 | GLM-5.3-Flash | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-1 | 97.50% | Coming soon | Coming soon |
| ARC-AGI-2 | 90.4% | Coming soon | Coming soon |
| ARC-AGI-3 | 30.2% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Directional only
- Claude Opus 5 public-lane score: 92.2 (#2/54)
- GLM-5.3-Flash public-lane score: 84 (#14/54)

| Benchmark | Claude Opus 5 | GLM-5.3-Flash | Winner |
|-----------|-----------|-----------|--------|
| Chartography (no tools) | 29.6% | Coming soon | Coming soon |
| Chartography (tools) | 83.0% | 78.0% | Claude Opus 5 |
| BenchCAD Vision2Code (no tools) | 0.366 | Coming soon | Coming soon |
| BenchCAD Vision2Code (tools) | 0.821 | Coming soon | Coming soon |
| GDP.pdf (no tools) | 83.4% | Coming soon | Coming soon |
| GDP.pdf (tools) | 85.5% | Coming soon | Coming soon |
| OfficeQA | 78.1% | Coming soon | Coming soon |
| OfficeQA Pro | 66.9% | 62.4% | Claude Opus 5 |
| CharXiv | Coming soon | 89.4% | Coming soon |
| BabyVision | Coming soon | 53.4% | Coming soon |
| MMVU | Coming soon | 80.5% | Coming soon |

### Knowledge

- Winner: Claude Opus 5
- Claude Opus 5 public-lane score: 81.7 (Supported · #7/177)
- GLM-5.3-Flash public-lane score: 60.5 (Supported · #43/177)

| Benchmark | Claude Opus 5 | GLM-5.3-Flash | Winner |
|-----------|-----------|-----------|--------|
| HLE | 64.7% | Coming soon | Coming soon |
| HLE w/o tools | 56.3% | Coming soon | Coming soon |
| HLE-Verified | 54.4% | Coming soon | Coming soon |
| LABBench2 | 84.2% | Coming soon | Coming soon |
| HealthBench (raw) | 67.1% | Coming soon | Coming soon |
| HealthBench (length-adjusted) | 57.8% | Coming soon | Coming soon |
| HealthBench Professional | 59.8% | Coming soon | Coming soon |
| HealthBench Professional (raw) | 73.4% | Coming soon | Coming soon |
| BioMysteryBench (human-solvable) | 90.1% | Coming soon | Coming soon |
| BioMysteryBench (human-difficult) | 49.4% | Coming soon | Coming soon |
| SpatialBench Verified | 72.5% | Coming soon | Coming soon |
| SingleCellBench | 60.6% | Coming soon | Coming soon |
| ProteinGym Hard | 47.7% | Coming soon | Coming soon |
| Protein Design | 42.5% | Coming soon | Coming soon |
| Organic chemistry V2 | 61.6% | Coming soon | Coming soon |
| Protocols (troubleshooting) | 61.1% | Coming soon | Coming soon |
| Protocols (understanding) | 78.4% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 93.4% | 86.4% | Claude Opus 5 |
| MMLU-Pro (Vals) | 91.6% | 86.1% | Claude Opus 5 |

### Multilingual

- Winner: Not comparable
- Claude Opus 5 public-lane score: Coming soon
- GLM-5.3-Flash public-lane score: Coming soon

| Benchmark | Claude Opus 5 | GLM-5.3-Flash | Winner |
|-----------|-----------|-----------|--------|
| GMMLU | 92.5% | Coming soon | Coming soon |
| MILU | 92.1% | Coming soon | Coming soon |
| INCLUDE | 89.8% | Coming soon | Coming soon |

### Instruction Following

- Winner: Not comparable
- Claude Opus 5 public-lane score: Coming soon
- GLM-5.3-Flash public-lane score: Coming soon

| Benchmark | Claude Opus 5 | GLM-5.3-Flash | Winner |
|-----------|-----------|-----------|--------|
| Gray Swan IPI (15 attempts) | 4.6% | Coming soon | Coming soon |

### Mathematics

- Winner: Not comparable
- Claude Opus 5 public-lane score: Coming soon
- GLM-5.3-Flash public-lane score: Coming soon

| Benchmark | Claude Opus 5 | GLM-5.3-Flash | Winner |
|-----------|-----------|-----------|--------|
| IMO 2026 | 42/42 | Coming soon | Coming soon |
| RiemannBench (no tools) | 60.0% | Coming soon | Coming soon |
| RiemannBench (tools) | 79.0% | Coming soon | Coming soon |
| ArXivMath Jun. 2026 (no tools) | 90.8% | Coming soon | Coming soon |
| ArXivMath Jun. 2026 (tools) | 91.3% | Coming soon | Coming soon |

## FAQ

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

Claude Opus 5 has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

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

The widest category gap is in agentic, where the averages are 77.7 for Claude Opus 5 and 55.7 for GLM-5.3-Flash.

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

Claude Opus 5 currently has 77 sourced benchmark scores on BenchLM.

### How many benchmarks does GLM-5.3-Flash cover on BenchLM?

GLM-5.3-Flash currently has 21 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Claude Opus 5 vs GLM-5.3](/compare/claude-opus-5-vs-glm-5-3)
- [GLM-5.3-Flash vs GLM-5.3](/compare/glm-5-3-vs-glm-5-3-flash)
- [Claude Opus 5 vs GLM-5.2](/compare/claude-opus-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 Opus 5 profile](/models/claude-opus-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)