# GLM-4.5 vs Step 5 Preview

> Step 5 Preview is the stronger model overall, scoring 47.9 to 42.0 on the Noometry Index.

- Canonical page: https://noometry.com/compare/glm-4-5-vs-step-5-preview
- Last updated: 2026-10-12
- Shared benchmarks: 13

## Summary

- They share 13 benchmarks with published results for both. GLM-4.5 scores higher in 0 categories and Step 5 Preview in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Step 5 Preview leads 40.0 to 28.6.
- GLM-4.5 is cheaper at $0.60 / $2.20 per million input/output tokens, against $1 / $2.70 for Step 5 Preview.
- Step 5 Preview accepts more context: 1.02M tokens versus 131K.
- GLM-4.5 has downloadable open weights; the other is API-only.

## Snapshot

| | GLM-4.5 | Step 5 Preview |
|---|---|---|
| Provider | Z.ai (Zhipu) | StepFun |
| Noometry Index | 42.0 | 47.9 |
| Rank | 122 | 58 |
| Context | 131K | 1.02M |
| Input $/M | $0.60 | $1 |
| Output $/M | $2.20 | $2.70 |
| Weights | Open | Proprietary |

## Coding

- GLM-4.5: 41.4 (#125)
- Step 5 Preview: 51.8 (#36)

| Benchmark | GLM-4.5 | Step 5 Preview |
|---|---|---|
| LMArena Coding | 1434 | 1480 |
| SWE-bench Verified (bash only) | 54.2% | — |
| LMArena WebDev | — | 1564 |
| SciCode | — | 58.9% |
| WeirdML | 40.6% | — |
| ALE-Bench | 344.82 | — |
| AlgoTune | 1.52 | — |

## Reasoning

- GLM-4.5: 28.6 (#100)
- Step 5 Preview: 40.0 (#57)

| Benchmark | GLM-4.5 | Step 5 Preview |
|---|---|---|
| LMArena Hard Prompts | 1429 | 1465 |
| Kagi LLM Benchmark | 57.9% | — |
| CritPt | — | 20.9% |

## Math

- GLM-4.5: 39.0 (#116)
- Step 5 Preview: 46.1 (#72)

| Benchmark | GLM-4.5 | Step 5 Preview |
|---|---|---|
| LMArena Math | 1427 | 1470 |
| ProofBench | — | 42% |

## Knowledge

- GLM-4.5: 35.9 (#179)
- Step 5 Preview: 41.2 (#112)

| Benchmark | GLM-4.5 | Step 5 Preview |
|---|---|---|
| LMArena Expert | 1433 | 1470 |
| Humanity's Last Exam | 8.3% | — |
| Confabulations | 11.3% | — |

## Multimodal

- GLM-4.5: —
- Step 5 Preview: 41.0 (#41)

| Benchmark | GLM-4.5 | Step 5 Preview |
|---|---|---|
| LMArena Vision | — | 1267 |

## Multilingual

- GLM-4.5: 52.8 (#77)
- Step 5 Preview: 53.8 (#54)

| Benchmark | GLM-4.5 | Step 5 Preview |
|---|---|---|
| LMArena Non-English | 1417 | 1432 |
| LMArena Chinese | 1465 | 1519 |
| LMArena Russian | 1414 | 1436 |
| LMArena Spanish | 1454 | 1439 |
| LMArena French | 1418 | — |
| LMArena German | 1407 | — |
| LMArena Japanese | 1415 | — |
| LMArena Korean | 1380 | — |

## Instruction Following

- GLM-4.5: 74.1 (#104)
- Step 5 Preview: 76.0 (#50)

| Benchmark | GLM-4.5 | Step 5 Preview |
|---|---|---|
| LMArena Instruction Following | 1404 | 1444 |

## Long Context

- GLM-4.5: 38.2 (#201)
- Step 5 Preview: 44.5 (#64)

| Benchmark | GLM-4.5 | Step 5 Preview |
|---|---|---|
| LMArena Longer Query | 1412 | 1455 |
| Fiction.LiveBench | 58.3% | — |

## Writing & Preference

- GLM-4.5: 57.5 (#127)
- Step 5 Preview: 62.8 (#71)

| Benchmark | GLM-4.5 | Step 5 Preview |
|---|---|---|
| LMArena Text | 1430 | 1442 |
| LMArena Creative Writing | 1395 | 1410 |
| LMArena Multi-Turn | 1415 | 1447 |
| Short-Story Creative Writing | 73.4% | — |
| EQ-Bench Creative Writing | 1343 | — |

## FAQ

### Is GLM-4.5 better than Step 5 Preview?

Step 5 Preview is the stronger model overall, scoring 47.9 to 42.0 on the Noometry Index.

### Which is cheaper, GLM-4.5 or Step 5 Preview?

GLM-4.5 is cheaper. It lists at $0.60 per million input tokens and $2.20 per million output tokens; Step 5 Preview lists at $1 and $2.70.

### Is GLM-4.5 or Step 5 Preview better for coding?

Step 5 Preview scores higher on coding benchmarks: 51.8 versus 41.4 in the Noometry coding category.

### Which has the bigger context window?

Step 5 Preview does, with 1.02M tokens against 131K.

### How many benchmarks do GLM-4.5 and Step 5 Preview share?

13 benchmarks have published results for both models. GLM-4.5 has 27 scored results on Noometry and Step 5 Preview has 18.