# GLM-4.5 vs GPT-5 Mini

> GLM-4.5 and GPT-5 Mini score almost the same on the Noometry Index (42.0 vs 41.8), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/glm-4-5-vs-gpt-5-mini
- Last updated: 2026-10-10
- Shared benchmarks: 27

## Summary

- They share 27 benchmarks with published results for both. GLM-4.5 scores higher in 4 categories and GPT-5 Mini in 4 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where GPT-5 Mini leads 45.6 to 35.9.
- The biggest single-benchmark swing is Kagi LLM Benchmark: 57.9% for GLM-4.5 and 70.3% for GPT-5 Mini.
- GPT-5 Mini is cheaper at $0.25 / $2 per million input/output tokens, against $0.60 / $2.20 for GLM-4.5.
- GPT-5 Mini accepts more context: 400K tokens versus 131K.
- GLM-4.5 has downloadable open weights; the other is API-only.

## Snapshot

| | GLM-4.5 | GPT-5 Mini |
|---|---|---|
| Provider | Z.ai (Zhipu) | OpenAI |
| Noometry Index | 42.0 | 41.8 |
| Rank | 122 | 128 |
| Context | 131K | 400K |
| Input $/M | $0.60 | $0.25 |
| Output $/M | $2.20 | $2 |
| Weights | Open | Proprietary |

## Coding

- GLM-4.5: 41.4 (#125)
- GPT-5 Mini: 40.1 (#146)

| Benchmark | GLM-4.5 | GPT-5 Mini |
|---|---|---|
| SWE-bench Verified (bash only) | 54.2% | 59.8% |
| WeirdML | 40.6% | 52.7% |
| LMArena Coding | 1434 | 1406 |
| ALE-Bench | 344.82 | 799.77 |
| AlgoTune | 1.52 | 1.38 |
| SWE-bench Verified | — | 64.7% |
| SWE-bench Multilingual | — | 39.7% |
| SciCode | — | 39.2% |

## Agentic & Tool Use

- GLM-4.5: —
- GPT-5 Mini: 31.1 (#70)

| Benchmark | GLM-4.5 | GPT-5 Mini |
|---|---|---|
| Terminal-Bench | — | 34.8% |
| Berkeley Function Calling Leaderboard | — | 55.5% |
| Vending-Bench 2 | — | -31.18 |

## Reasoning

- GLM-4.5: 28.6 (#100)
- GPT-5 Mini: 23.9 (#168)

| Benchmark | GLM-4.5 | GPT-5 Mini |
|---|---|---|
| Kagi LLM Benchmark | 57.9% | 70.3% |
| LMArena Hard Prompts | 1429 | 1380 |
| ARC-AGI-2 | — | 4.4% |
| ARC-AGI-1 | — | 54.3% |
| CritPt | — | 0% |
| Chess Puzzles | — | 30% |
| EnigmaEval | — | 8.2% |
| Mystery Game Puzzles | — | 10% |
| DTBench | — | 80.5% |
| LMCA | — | 34.2% |
| Epoch Capabilities Index | — | 145.52 |
| ForecastBench | — | 61 |

## Math

- GLM-4.5: 39.0 (#116)
- GPT-5 Mini: 46.7 (#69)

| Benchmark | GLM-4.5 | GPT-5 Mini |
|---|---|---|
| LMArena Math | 1427 | 1378 |
| FrontierMath (Tiers 1-3) | — | 46.7% |
| FrontierMath Tier 4 | — | 12.2% |
| OTIS Mock AIME 2024-2025 | — | 86.7% |
| ProofBench | — | 9% |
| Omni-MATH | — | 72.2% |
| MATH Level 5 | — | 97.8% |
| FrontierMath (Feb 2025 set) | — | 27.2% |
| FrontierMath Tier 4 (v1) | — | 6.3% |

## Knowledge

- GLM-4.5: 35.9 (#179)
- GPT-5 Mini: 45.6 (#86)

| Benchmark | GLM-4.5 | GPT-5 Mini |
|---|---|---|
| Humanity's Last Exam | 8.3% | 19.4% |
| Confabulations | 11.3% | 13.3% |
| LMArena Expert | 1433 | 1379 |
| GPQA Diamond | — | 75% |
| SimpleQA Verified | — | 21.6% |
| MMLU-Pro | — | 83.5% |
| Vectara Hallucination Rate | — | 12.9% |
| GPQA (HELM) | — | 75.6% |

## Multimodal

- GLM-4.5: —
- GPT-5 Mini: 35.6 (#85)

| Benchmark | GLM-4.5 | GPT-5 Mini |
|---|---|---|
| LMArena Vision | — | 1202 |
| VPCT | — | 40.2% |

## Multilingual

- GLM-4.5: 52.8 (#77)
- GPT-5 Mini: 48.9 (#137)

| Benchmark | GLM-4.5 | GPT-5 Mini |
|---|---|---|
| LMArena Non-English | 1417 | 1363 |
| LMArena Chinese | 1465 | 1385 |
| LMArena French | 1418 | 1386 |
| LMArena German | 1407 | 1366 |
| LMArena Japanese | 1415 | 1341 |
| LMArena Korean | 1380 | 1308 |
| LMArena Russian | 1414 | 1362 |
| LMArena Spanish | 1454 | 1355 |

## Instruction Following

- GLM-4.5: 74.1 (#104)
- GPT-5 Mini: 76.2 (#46)

| Benchmark | GLM-4.5 | GPT-5 Mini |
|---|---|---|
| LMArena Instruction Following | 1404 | 1357 |
| IFEval | — | 92.7% |

## Long Context

- GLM-4.5: 38.2 (#201)
- GPT-5 Mini: 41.9 (#132)

| Benchmark | GLM-4.5 | GPT-5 Mini |
|---|---|---|
| Fiction.LiveBench | 58.3% | 69.4% |
| LMArena Longer Query | 1412 | 1355 |

## Writing & Preference

- GLM-4.5: 57.5 (#127)
- GPT-5 Mini: 55.2 (#148)

| Benchmark | GLM-4.5 | GPT-5 Mini |
|---|---|---|
| LMArena Text | 1430 | 1373 |
| LMArena Creative Writing | 1395 | 1325 |
| Short-Story Creative Writing | 73.4% | 83.1% |
| EQ-Bench Creative Writing | 1343 | 1313 |
| LMArena Multi-Turn | 1415 | 1363 |
| WildBench | — | 85.5% |

## FAQ

### Is GLM-4.5 better than GPT-5 Mini?

GLM-4.5 and GPT-5 Mini score almost the same on the Noometry Index (42.0 vs 41.8), so choose on price, context window or the category you care about most.

### Which is cheaper, GLM-4.5 or GPT-5 Mini?

GPT-5 Mini is cheaper. It lists at $0.25 per million input tokens and $2 per million output tokens; GLM-4.5 lists at $0.60 and $2.20.

### Is GLM-4.5 or GPT-5 Mini better for coding?

GLM-4.5 scores higher on coding benchmarks: 41.4 versus 40.1 in the Noometry coding category.

### Which has the bigger context window?

GPT-5 Mini does, with 400K tokens against 131K.

### How many benchmarks do GLM-4.5 and GPT-5 Mini share?

27 benchmarks have published results for both models. GLM-4.5 has 27 scored results on Noometry and GPT-5 Mini has 60.