# Claude Sonnet 5.5 vs GLM-4.6

> Claude Sonnet 5.5 is the stronger model overall, scoring 60.5 to 40.9 on the Noometry Index. GLM-4.6 costs 4.0× less per token, which makes it the better buy when Claude Sonnet 5.5's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/claude-sonnet-5-5-vs-glm-4-6
- Last updated: 2026-10-10
- Shared benchmarks: 4

## Summary

- They share 4 benchmarks with published results for both. Claude Sonnet 5.5 scores higher in 5 categories and GLM-4.6 in 0 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Sonnet 5.5 leads 88.7 to 36.4.
- The biggest single-benchmark swing is CritPt: 31.4% for Claude Sonnet 5.5 and 1.1% for GLM-4.6.
- GLM-4.6 is cheaper at $0.60 / $2.20 per million input/output tokens, against $2 / $10 for Claude Sonnet 5.5.
- Claude Sonnet 5.5 accepts more context: 1M tokens versus 205K.
- GLM-4.6 has downloadable open weights; the other is API-only.

## Snapshot

| | Claude Sonnet 5.5 | GLM-4.6 |
|---|---|---|
| Provider | Anthropic | Z.ai (Zhipu) |
| Noometry Index | 60.5 | 40.9 |
| Rank | 10 | 132 |
| Context | 1M | 205K |
| Input $/M | $2 | $0.60 |
| Output $/M | $10 | $2.20 |
| Weights | Proprietary | Open |

## Coding

- Claude Sonnet 5.5: 65.5 (#6)
- GLM-4.6: 39.9 (#137)

| Benchmark | Claude Sonnet 5.5 | GLM-4.6 |
|---|---|---|
| LMArena WebDev | 1699 | 1339 |
| SciCode | 61% | 38.4% |
| ALE-Bench | 1,819 | 340.82 |
| FrontierCode | 52.1% | — |
| SWE-bench Verified (bash only) | — | 55.4% |
| CursorBench | 55.5% | — |
| FrontierSWE | 61.9% | — |
| LMArena Coding | — | 1449 |

## Agentic & Tool Use

- Claude Sonnet 5.5: 44.9 (#14)
- GLM-4.6: 32.1 (#60)

| Benchmark | Claude Sonnet 5.5 | GLM-4.6 |
|---|---|---|
| Terminal-Bench | — | 24.5% |
| APEX-Agents | 75.5% | — |
| Berkeley Function Calling Leaderboard | — | 72.4% |

## Reasoning

- Claude Sonnet 5.5: 52.4 (#29)
- GLM-4.6: 23.1 (#168)

| Benchmark | Claude Sonnet 5.5 | GLM-4.6 |
|---|---|---|
| CritPt | 31.4% | 1.1% |
| Kagi LLM Benchmark | — | 47.4% |
| LMArena Hard Prompts | — | 1440 |
| Mystery Game Puzzles | 65% | — |

## Math

- Claude Sonnet 5.5: 88.7 (#4)
- GLM-4.6: 36.4 (#115)

| Benchmark | Claude Sonnet 5.5 | GLM-4.6 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 88.8% | — |
| FrontierMath Tier 4 | 80.5% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| ProofBench | 100% | — |
| LMArena Math | — | 1431 |
| FrontierMath (Feb 2025 set) | — | 3.8% |
| FrontierMath Tier 4 (v1) | — | 2.1% |

## Knowledge

- Claude Sonnet 5.5: 66.0 (#11)
- GLM-4.6: 39.6 (#118)

| Benchmark | Claude Sonnet 5.5 | GLM-4.6 |
|---|---|---|
| GPQA Diamond | 95.6% | — |
| SimpleQA Verified | 46.5% | — |
| Vectara Hallucination Rate | — | 9.5% |
| LMArena Expert | — | 1432 |

## Multimodal

- Claude Sonnet 5.5: 53.2 (#5)
- GLM-4.6: —

| Benchmark | Claude Sonnet 5.5 | GLM-4.6 |
|---|---|---|
| Furniture Assembly | 75% | — |

## Multilingual

- Claude Sonnet 5.5: —
- GLM-4.6: 53.6 (#62)

| Benchmark | Claude Sonnet 5.5 | GLM-4.6 |
|---|---|---|
| LMArena Non-English | — | 1426 |
| LMArena Chinese | — | 1500 |
| LMArena French | — | 1459 |
| LMArena German | — | 1447 |
| LMArena Japanese | — | 1394 |
| LMArena Korean | — | 1401 |
| LMArena Russian | — | 1418 |
| LMArena Spanish | — | 1436 |

## Instruction Following

- Claude Sonnet 5.5: —
- GLM-4.6: 74.5 (#93)

| Benchmark | Claude Sonnet 5.5 | GLM-4.6 |
|---|---|---|
| LMArena Instruction Following | — | 1410 |

## Long Context

- Claude Sonnet 5.5: —
- GLM-4.6: 43.4 (#91)

| Benchmark | Claude Sonnet 5.5 | GLM-4.6 |
|---|---|---|
| LMArena Longer Query | — | 1423 |

## Writing & Preference

- Claude Sonnet 5.5: —
- GLM-4.6: 61.3 (#86)

| Benchmark | Claude Sonnet 5.5 | GLM-4.6 |
|---|---|---|
| LMArena Text | — | 1440 |
| LMArena Creative Writing | — | 1411 |
| EQ-Bench Creative Writing | — | 1411 |
| LMArena Multi-Turn | — | 1427 |

## FAQ

### Is Claude Sonnet 5.5 better than GLM-4.6?

Claude Sonnet 5.5 is the stronger model overall, scoring 60.5 to 40.9 on the Noometry Index. GLM-4.6 costs 4.0× less per token, which makes it the better buy when Claude Sonnet 5.5's lead doesn't matter for your workload.

### Which is cheaper, Claude Sonnet 5.5 or GLM-4.6?

GLM-4.6 is cheaper. It lists at $0.60 per million input tokens and $2.20 per million output tokens; Claude Sonnet 5.5 lists at $2 and $10.

### Is Claude Sonnet 5.5 or GLM-4.6 better for coding?

Claude Sonnet 5.5 scores higher on coding benchmarks: 65.5 versus 39.9 in the Noometry coding category.

### Which has the bigger context window?

Claude Sonnet 5.5 does, with 1M tokens against 205K.

### How many benchmarks do Claude Sonnet 5.5 and GLM-4.6 share?

4 benchmarks have published results for both models. Claude Sonnet 5.5 has 16 scored results on Noometry and GLM-4.6 has 29.