# Claude Fable 5 vs GLM-5.1

> Side-by-side benchmark comparison for Claude Fable 5 and GLM-5.1 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-fable-vs-glm-5-1
- Last updated: September 4, 2026

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

## Quick Verdict

Pick Claude Fable 5 if you want the stronger benchmark profile. GLM-5.1 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Claude Fable 5 leads overall 80.9 to 64.41.
- The clearest category separation is in knowledge, where the averages are 83.5 for Claude Fable 5 and 55.4 for GLM-5.1.
- The biggest single benchmark swing is Terminal-Bench 2.1 (Vals) in Agentic, with scores of 80.5% and 56.9%.
- GLM-5.1 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Claude Fable 5 also has the larger context window at 1M+.

## Model Snapshot

| Property | Claude Fable 5 | GLM-5.1 |
|----------|----------|----------|
| Creator | Anthropic | Z.AI |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M+ | 203K |
| Overall Score | 80.9 | 64.41 |
| Benchmarks Covered | 18 | 26 |
| Pricing (input/output) | $10.00 / $50.00 | $1.40 / $4.40 |

## Category Breakdown

### Agentic

- Winner: Coming soon
- Claude Fable 5 public-lane score: 74.8 (Supported · #3/151)
- GLM-5.1 public-lane score: 50.1 (Estimated · #63/151)

| Benchmark | Claude Fable 5 | GLM-5.1 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 34.0% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 84.3% | 63.5% | Claude Fable 5 |
| OSWorld-Verified | 85% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 80.5% | 56.9% | Claude Fable 5 |
| BrowseComp | Coming soon | 68% | Coming soon |
| τ³-bench results | Coming soon | 70.6% | Coming soon |
| MCP Atlas | Coming soon | 71.8% | Coming soon |
| CyberGym | Coming soon | 68.7% | Coming soon |
| Claw-Eval | Coming soon | 62.3% | Coming soon |
| Gert Labs | Coming soon | 60.11% | Coming soon |
| ResearchClawBench | Coming soon | 18.2% | Coming soon |

### Coding

- Winner: Claude Fable 5
- Claude Fable 5 public-lane score: 76.9 (Supported · #2/183)
- GLM-5.1 public-lane score: 56.8 (Supported · #39/183)

| Benchmark | Claude Fable 5 | GLM-5.1 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 95% | Coming soon | Coming soon |
| SWE-bench Pro | 80% | 58.4% | Claude Fable 5 |
| FrontierSWE v2 | 48.0% | Coming soon | Coming soon |
| FrontierCode 1.1 Main | 53.5% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 84.3% | Coming soon | Coming soon |
| cursorBench31 | 70.6% | Coming soon | Coming soon |
| cursorBench32 | 70.5% | Coming soon | Coming soon |
| VulcanBench v3 | 89.5% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 89.8% | 81.4% | Claude Fable 5 |
| SWE-bench (Vals) | 95.0% | 76.4% | Claude Fable 5 |
| NL2Repo | Coming soon | 42.7% | Coming soon |
| SWE-Rebench | Coming soon | 62.7% | Coming soon |
| Vibe Code Bench | Coming soon | 31.46% | Coming soon |
| OpenHarmony Bench | Coming soon | 52.3% | Coming soon |

### Multimodal & Grounded

- Winner: Coming soon
- Claude Fable 5 public-lane score: 62.5 (Unranked · 2 rankable rows)
- GLM-5.1 public-lane score: Coming soon

| Benchmark | Claude Fable 5 | GLM-5.1 | Winner |
|-----------|-----------|-----------|--------|
| Blueprint-Bench 2 | 38.6% | Coming soon | Coming soon |
| OfficeQA Pro | 57.9% | Coming soon | Coming soon |

### Reasoning

- Winner: Coming soon
- Claude Fable 5 public-lane score: 76.2 (#11/22)
- GLM-5.1 public-lane score: 69.9 (Unranked · 2 rankable rows)

### Knowledge

- Winner: Claude Fable 5
- Claude Fable 5 public-lane score: 83.5 (Supported · #2/181)
- GLM-5.1 public-lane score: 55.4 (Supported · #59/181)

| Benchmark | Claude Fable 5 | GLM-5.1 | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | 93.2% | 84.5% | Claude Fable 5 |
| MMLU-Pro (Vals) | 91.5% | 86.9% | Claude Fable 5 |
| GPQA-D | Coming soon | 86.2% | Coming soon |
| HLE | Coming soon | 52.3% | Coming soon |

### Instruction Following

- Winner: Coming soon
- Claude Fable 5 public-lane score: 78.3 (#54/120)
- GLM-5.1 public-lane score: 93.5 (#5/120)

### Mathematics

- Winner: Coming soon
- Claude Fable 5 public-lane score: Coming soon
- GLM-5.1 public-lane score: 64.1 (#3/7)

| Benchmark | Claude Fable 5 | GLM-5.1 | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | Coming soon | 95.3% | Coming soon |
| HMMT Nov 2025 | Coming soon | 94.0% | Coming soon |
| HMMT Feb 2026 | Coming soon | 82.6% | Coming soon |
| MMAnswerBench | Coming soon | 83.8% | Coming soon |
| FrontierMath v2 (Tiers 1-3) | Coming soon | 33.448% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 12.500% | Coming soon |

## FAQ

### Which is better overall, Claude Fable 5 or GLM-5.1?

Claude Fable 5 is ahead overall on BenchLM right now.

### Where is the biggest gap between Claude Fable 5 and GLM-5.1?

The widest category gap is in knowledge, where the averages are 83.5 for Claude Fable 5 and 55.4 for GLM-5.1.

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

Claude Fable 5 currently has 18 sourced benchmark scores on BenchLM.

### How many benchmarks does GLM-5.1 cover on BenchLM?

GLM-5.1 currently has 26 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Claude Fable 5 vs Claude Fable 5.1](/compare/claude-fable-vs-claude-fable-5-1)
- [GLM-5.1 vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-glm-5-1)
- [Claude Fable 5 vs GLM-5.3](/compare/claude-fable-vs-glm-5-3)
- [GLM-5.1 vs GLM-5.3](/compare/glm-5-1-vs-glm-5-3)

## Explore More

- [Claude Fable 5 profile](/models/claude-fable)
- [GLM-5.1 profile](/models/glm-5-1)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)