# GLM-5.1 vs GPT-6.1 Sol

> GLM-5.1 has enough public results to be ranked (#51); GPT-6.1 Sol does not yet, so treat this comparison as directional.

- Canonical page: https://noometry.com/compare/glm-5-1-vs-gpt-6-1-sol
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- The widest gap is in agentic & tool use, where GPT-6.1 Sol leads 34.3 to 24.8.
- GLM-5.1 is cheaper at $1.40 / $4.40 per million input/output tokens, against $2 / $10 for GPT-6.1 Sol.
- GPT-6.1 Sol accepts more context: 1.05M tokens versus 200K.
- GLM-5.1 has downloadable open weights; the other is API-only.

## Snapshot

| | GLM-5.1 | GPT-6.1 Sol |
|---|---|---|
| Provider | Z.ai (Zhipu) | OpenAI |
| Noometry Index | 47.6 | 42.1 |
| Rank | 51 | — |
| Context | 200K | 1.05M |
| Input $/M | $1.40 | $2 |
| Output $/M | $4.40 | $10 |
| Weights | Open | Proprietary |

## Coding

- GLM-5.1: 48.5 (#52)
- GPT-6.1 Sol: 51.4

| Benchmark | GLM-5.1 | GPT-6.1 Sol |
|---|---|---|
| SWE-bench Verified | 74.2% | — |
| DeepSWE | — | 75.2% |
| LMArena WebDev | 1509 | — |
| SciCode | 43.8% | — |
| WeirdML | 57.1% | — |
| LMArena Coding | 1486 | — |
| ALE-Bench | 887.1 | — |

## Agentic & Tool Use

- GLM-5.1: 24.8 (#106)
- GPT-6.1 Sol: 34.3

| Benchmark | GLM-5.1 | GPT-6.1 Sol |
|---|---|---|
| APEX-Agents | 40.9% | — |
| ExploitBench | 18.1% | — |
| GBAEval | 0% | — |
| GDP.pdf | — | 32% |
| Vending-Bench 2 | 5,634 | — |

## Reasoning

- GLM-5.1: 38.2 (#57)
- GPT-6.1 Sol: —

| Benchmark | GLM-5.1 | GPT-6.1 Sol |
|---|---|---|
| SimpleBench | 55.1% | — |
| NYT Connections (extended) | 77.7% | — |
| CritPt | 4.6% | — |
| Chess Puzzles | 19% | — |
| Thematic Generalization | 69.8% | — |
| LMArena Hard Prompts | 1472 | — |
| Epoch Capabilities Index | 149.86 | — |

## Math

- GLM-5.1: 49.0 (#48)
- GPT-6.1 Sol: —

| Benchmark | GLM-5.1 | GPT-6.1 Sol |
|---|---|---|
| FrontierMath (Tiers 1-3) | 36.8% | — |
| MathArena Final-Answer Competitions | 67.1% | — |
| OTIS Mock AIME 2024-2025 | 93.3% | — |
| ProofBench | 22.2% | — |
| LMArena Math | 1472 | — |
| FrontierMath (Feb 2025 set) | 33.4% | — |
| FrontierMath Tier 4 (v1) | 12.5% | — |

## Knowledge

- GLM-5.1: 55.0 (#45)
- GPT-6.1 Sol: —

| Benchmark | GLM-5.1 | GPT-6.1 Sol |
|---|---|---|
| GPQA Diamond | 89.9% | — |
| SimpleQA Verified | 34% | — |
| LMArena Expert | 1477 | — |

## Multilingual

- GLM-5.1: 55.2 (#34)
- GPT-6.1 Sol: —

| Benchmark | GLM-5.1 | GPT-6.1 Sol |
|---|---|---|
| LMArena Non-English | 1448 | — |
| LMArena Chinese | 1516 | — |
| LMArena French | 1478 | — |
| LMArena German | 1466 | — |
| LMArena Japanese | 1436 | — |
| LMArena Korean | 1423 | — |
| LMArena Russian | 1453 | — |
| LMArena Spanish | 1467 | — |

## Instruction Following

- GLM-5.1: 76.5 (#41)
- GPT-6.1 Sol: —

| Benchmark | GLM-5.1 | GPT-6.1 Sol |
|---|---|---|
| LMArena Instruction Following | 1451 | — |

## Long Context

- GLM-5.1: 44.9 (#51)
- GPT-6.1 Sol: —

| Benchmark | GLM-5.1 | GPT-6.1 Sol |
|---|---|---|
| LMArena Longer Query | 1467 | — |

## Writing & Preference

- GLM-5.1: 67.2 (#29)
- GPT-6.1 Sol: —

| Benchmark | GLM-5.1 | GPT-6.1 Sol |
|---|---|---|
| LMArena Text | 1462 | — |
| LMArena Creative Writing | 1454 | — |
| EQ-Bench Creative Writing | 1592 | — |
| LMArena Multi-Turn | 1473 | — |

## FAQ

### Is GLM-5.1 better than GPT-6.1 Sol?

GLM-5.1 has enough public results to be ranked (#51); GPT-6.1 Sol does not yet, so treat this comparison as directional.

### Which is cheaper, GLM-5.1 or GPT-6.1 Sol?

GLM-5.1 is cheaper. It lists at $1.40 per million input tokens and $4.40 per million output tokens; GPT-6.1 Sol lists at $2 and $10.

### Is GLM-5.1 or GPT-6.1 Sol better for coding?

GPT-6.1 Sol scores higher on coding benchmarks: 51.4 versus 48.5 in the Noometry coding category.

### Which has the bigger context window?

GPT-6.1 Sol does, with 1.05M tokens against 200K.

### How many benchmarks do GLM-5.1 and GPT-6.1 Sol share?

0 benchmarks have published results for both models. GLM-5.1 has 41 scored results on Noometry and GPT-6.1 Sol has 2.