# GLM-4.5V vs GPT-5.5 Instant

> GPT-5.5 Instant is the stronger model overall, scoring 42.5 to 39.2 on the Noometry Index.

- Canonical page: https://noometry.com/compare/glm-4-5v-vs-gpt-5-5-instant
- Last updated: 2026-10-10
- Shared benchmarks: 14

## Summary

- They share 14 benchmarks with published results for both. GLM-4.5V scores higher in 2 categories and GPT-5.5 Instant in 7 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where GPT-5.5 Instant leads 48.9 to 36.8.
- GLM-4.5V has downloadable open weights; the other is API-only.

## Snapshot

| | GLM-4.5V | GPT-5.5 Instant |
|---|---|---|
| Provider | Z.ai (Zhipu) | OpenAI |
| Noometry Index | 39.2 | 42.5 |
| Rank | 158 | 99 |
| Context | 64K | — |
| Input $/M | $0.60 | — |
| Output $/M | $1.80 | — |
| Weights | Open | Proprietary |

## Coding

- GLM-4.5V: 38.9 (#152)
- GPT-5.5 Instant: 43.7 (#73)

| Benchmark | GLM-4.5V | GPT-5.5 Instant |
|---|---|---|
| LMArena Coding | 1347 | 1433 |
| SciCode | — | 48.6% |

## Reasoning

- GLM-4.5V: 26.5 (#118)
- GPT-5.5 Instant: 24.2 (#149)

| Benchmark | GLM-4.5V | GPT-5.5 Instant |
|---|---|---|
| LMArena Hard Prompts | 1335 | 1426 |
| Kagi LLM Benchmark | 59.8% | — |
| CritPt | — | 0% |
| Chess Puzzles | — | 12% |
| Epoch Capabilities Index | — | 142.48 |

## Math

- GLM-4.5V: 34.7 (#157)
- GPT-5.5 Instant: 26.1 (#241)

| Benchmark | GLM-4.5V | GPT-5.5 Instant |
|---|---|---|
| LMArena Math | 1353 | 1420 |
| FrontierMath (Tiers 1-3) | — | 26.3% |
| FrontierMath Tier 4 | — | 2.4% |
| OTIS Mock AIME 2024-2025 | — | 68.1% |

## Knowledge

- GLM-4.5V: 36.8 (#155)
- GPT-5.5 Instant: 48.9 (#68)

| Benchmark | GLM-4.5V | GPT-5.5 Instant |
|---|---|---|
| LMArena Expert | 1353 | 1409 |
| GPQA Diamond | — | 82.5% |

## Multimodal

- GLM-4.5V: 33.6 (#86)
- GPT-5.5 Instant: 39.3 (#48)

| Benchmark | GLM-4.5V | GPT-5.5 Instant |
|---|---|---|
| LMArena Vision | 1154 | 1250 |
| LMArena Document | — | 1403 |

## Multilingual

- GLM-4.5V: 44.9 (#172)
- GPT-5.5 Instant: 53.0 (#76)

| Benchmark | GLM-4.5V | GPT-5.5 Instant |
|---|---|---|
| LMArena Non-English | 1304 | 1417 |
| LMArena Chinese | 1338 | 1457 |
| LMArena Russian | 1299 | 1430 |
| LMArena Spanish | 1335 | 1430 |
| LMArena French | — | 1428 |
| LMArena German | — | 1410 |
| LMArena Japanese | — | 1408 |
| LMArena Korean | — | 1393 |

## Instruction Following

- GLM-4.5V: 69.4 (#170)
- GPT-5.5 Instant: 74.4 (#94)

| Benchmark | GLM-4.5V | GPT-5.5 Instant |
|---|---|---|
| LMArena Instruction Following | 1311 | 1407 |

## Long Context

- GLM-4.5V: 39.6 (#166)
- GPT-5.5 Instant: 43.4 (#92)

| Benchmark | GLM-4.5V | GPT-5.5 Instant |
|---|---|---|
| LMArena Longer Query | 1305 | 1422 |

## Writing & Preference

- GLM-4.5V: 52.7 (#162)
- GPT-5.5 Instant: 62.0 (#81)

| Benchmark | GLM-4.5V | GPT-5.5 Instant |
|---|---|---|
| LMArena Text | 1333 | 1419 |
| LMArena Creative Writing | 1295 | 1420 |
| LMArena Multi-Turn | 1333 | 1434 |

## FAQ

### Is GLM-4.5V better than GPT-5.5 Instant?

GPT-5.5 Instant is the stronger model overall, scoring 42.5 to 39.2 on the Noometry Index.

### Is GLM-4.5V or GPT-5.5 Instant better for coding?

GPT-5.5 Instant scores higher on coding benchmarks: 43.7 versus 38.9 in the Noometry coding category.

### How many benchmarks do GLM-4.5V and GPT-5.5 Instant share?

14 benchmarks have published results for both models. GLM-4.5V has 15 scored results on Noometry and GPT-5.5 Instant has 27.