# GLM-4.5 vs Mercury 2.5

> GLM-4.5 has enough public results to be ranked (#125); Mercury 2.5 does not yet, so treat this comparison as directional.

- Canonical page: https://noometry.com/compare/glm-4-5-vs-mercury-2-5
- Last updated: 2026-10-10
- Shared benchmarks: 1

## Summary

- They share 1 benchmark with published results for both. GLM-4.5 scores higher in 1 category and Mercury 2.5 in 0 categories; one gap is clear of the uncertainty.
- The widest gap is in math, where GLM-4.5 leads 36.3 to 22.4.
- Mercury 2.5 is cheaper at $0.04 / $0.15 per million input/output tokens, against $0.60 / $2.20 for GLM-4.5.
- Mercury 2.5 accepts more context: 260K tokens versus 131K.
- GLM-4.5 has downloadable open weights; the other is API-only.

## Snapshot

| | GLM-4.5 | Mercury 2.5 |
|---|---|---|
| Provider | Z.ai (Zhipu) | Inception |
| Noometry Index | 41.4 | 30.2 |
| Rank | 125 | — |
| Context | 131K | 260K |
| Input $/M | $0.60 | $0.04 |
| Output $/M | $2.20 | $0.15 |
| Weights | Open | Proprietary |

## Coding

- GLM-4.5: 41.1 (#121)
- Mercury 2.5: —

| Benchmark | GLM-4.5 | Mercury 2.5 |
|---|---|---|
| ALE-Bench | 344.82 | 301.65 |
| SWE-bench Verified (bash only) | 54.2% | — |
| WeirdML | 40.6% | — |
| LMArena Coding | 1434 | — |
| AlgoTune | 1.52 | — |

## Reasoning

- GLM-4.5: 27.7 (#99)
- Mercury 2.5: —

| Benchmark | GLM-4.5 | Mercury 2.5 |
|---|---|---|
| Kagi LLM Benchmark | 57.9% | — |
| LMArena Hard Prompts | 1430 | — |

## Math

- GLM-4.5: 36.3 (#119)
- Mercury 2.5: 22.4

| Benchmark | GLM-4.5 | Mercury 2.5 |
|---|---|---|
| ProofBench | — | 3% |
| LMArena Math | 1427 | — |

## Knowledge

- GLM-4.5: 35.5 (#172)
- Mercury 2.5: —

| Benchmark | GLM-4.5 | Mercury 2.5 |
|---|---|---|
| Humanity's Last Exam | 8.3% | — |
| Confabulations | 11.3% | — |
| LMArena Expert | 1433 | — |

## Multilingual

- GLM-4.5: 53.0 (#74)
- Mercury 2.5: —

| Benchmark | GLM-4.5 | Mercury 2.5 |
|---|---|---|
| LMArena Non-English | 1417 | — |
| LMArena Chinese | 1465 | — |
| LMArena French | 1423 | — |
| LMArena German | 1406 | — |
| LMArena Japanese | 1416 | — |
| LMArena Korean | 1382 | — |
| LMArena Russian | 1414 | — |
| LMArena Spanish | 1454 | — |

## Instruction Following

- GLM-4.5: 74.3 (#100)
- Mercury 2.5: —

| Benchmark | GLM-4.5 | Mercury 2.5 |
|---|---|---|
| LMArena Instruction Following | 1405 | — |

## Long Context

- GLM-4.5: 38.2 (#196)
- Mercury 2.5: —

| Benchmark | GLM-4.5 | Mercury 2.5 |
|---|---|---|
| Fiction.LiveBench | 58.3% | — |
| LMArena Longer Query | 1413 | — |

## Writing & Preference

- GLM-4.5: 57.7 (#121)
- Mercury 2.5: —

| Benchmark | GLM-4.5 | Mercury 2.5 |
|---|---|---|
| LMArena Text | 1430 | — |
| LMArena Creative Writing | 1395 | — |
| Short-Story Creative Writing | 73.4% | — |
| EQ-Bench Creative Writing | 1343 | — |
| LMArena Multi-Turn | 1415 | — |

## FAQ

### Is GLM-4.5 better than Mercury 2.5?

GLM-4.5 has enough public results to be ranked (#125); Mercury 2.5 does not yet, so treat this comparison as directional.

### Which is cheaper, GLM-4.5 or Mercury 2.5?

Mercury 2.5 is cheaper. It lists at $0.04 per million input tokens and $0.15 per million output tokens; GLM-4.5 lists at $0.60 and $2.20.

### Which has the bigger context window?

Mercury 2.5 does, with 260K tokens against 131K.

### How many benchmarks do GLM-4.5 and Mercury 2.5 share?

1 benchmark has published results for both models. GLM-4.5 has 27 scored results on Noometry and Mercury 2.5 has 2.