# Chatgpt 4o Latest 20250326 vs Muse Glimmer

> Chatgpt 4o Latest 20250326 is the stronger model overall, scoring 43.2 to 41.3 on the Noometry Index.

- Canonical page: https://noometry.com/compare/chatgpt-4o-vs-muse-glimmer
- Last updated: 2026-10-10
- Shared benchmarks: 12

## Summary

- They share 12 benchmarks with published results for both. Chatgpt 4o Latest 20250326 scores higher in 7 categories and Muse Glimmer in 1 category; 6 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Chatgpt 4o Latest 20250326 leads 32.8 to 27.2.
- Muse Glimmer has downloadable open weights; the other is API-only.

## Snapshot

| | Chatgpt 4o Latest 20250326 | Muse Glimmer |
|---|---|---|
| Provider | OpenAI | Meta |
| Noometry Index | 43.2 | 41.3 |
| Rank | 84 | 128 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Proprietary | Open |

## Coding

- Chatgpt 4o Latest 20250326: 41.0 (#122)
- Muse Glimmer: 38.7 (#157)

| Benchmark | Chatgpt 4o Latest 20250326 | Muse Glimmer |
|---|---|---|
| LMArena Coding | 1413 | 1417 |
| LMArena WebDev | — | 1355 |

## Reasoning

- Chatgpt 4o Latest 20250326: 32.8 (#64)
- Muse Glimmer: 27.2 (#111)

| Benchmark | Chatgpt 4o Latest 20250326 | Muse Glimmer |
|---|---|---|
| LMArena Hard Prompts | 1424 | 1395 |
| Kagi LLM Benchmark | 75% | — |

## Math

- Chatgpt 4o Latest 20250326: 35.8 (#134)
- Muse Glimmer: 36.1 (#128)

| Benchmark | Chatgpt 4o Latest 20250326 | Muse Glimmer |
|---|---|---|
| LMArena Math | 1407 | 1419 |

## Knowledge

- Chatgpt 4o Latest 20250326: 38.7 (#131)
- Muse Glimmer: 37.9 (#140)

| Benchmark | Chatgpt 4o Latest 20250326 | Muse Glimmer |
|---|---|---|
| LMArena Expert | 1400 | 1388 |
| Confabulations | 16.6% | — |

## Multimodal

- Chatgpt 4o Latest 20250326: 38.9 (#54)
- Muse Glimmer: —

| Benchmark | Chatgpt 4o Latest 20250326 | Muse Glimmer |
|---|---|---|
| LMArena Vision | 1243 | — |

## Multilingual

- Chatgpt 4o Latest 20250326: 53.1 (#72)
- Muse Glimmer: 50.6 (#117)

| Benchmark | Chatgpt 4o Latest 20250326 | Muse Glimmer |
|---|---|---|
| LMArena Non-English | 1419 | 1384 |
| LMArena Chinese | 1456 | 1412 |
| LMArena Russian | 1429 | 1393 |
| LMArena French | 1447 | — |
| LMArena German | 1424 | — |
| LMArena Japanese | 1406 | — |
| LMArena Korean | 1397 | — |
| LMArena Spanish | 1435 | — |

## Instruction Following

- Chatgpt 4o Latest 20250326: 74.2 (#102)
- Muse Glimmer: 72.7 (#134)

| Benchmark | Chatgpt 4o Latest 20250326 | Muse Glimmer |
|---|---|---|
| LMArena Instruction Following | 1403 | 1374 |

## Long Context

- Chatgpt 4o Latest 20250326: 43.1 (#104)
- Muse Glimmer: 42.1 (#124)

| Benchmark | Chatgpt 4o Latest 20250326 | Muse Glimmer |
|---|---|---|
| LMArena Longer Query | 1413 | 1381 |

## Writing & Preference

- Chatgpt 4o Latest 20250326: 62.8 (#68)
- Muse Glimmer: 57.7 (#122)

| Benchmark | Chatgpt 4o Latest 20250326 | Muse Glimmer |
|---|---|---|
| LMArena Text | 1429 | 1389 |
| LMArena Creative Writing | 1406 | 1338 |
| LMArena Multi-Turn | 1454 | 1398 |
| EQ-Bench Creative Writing | 1501 | — |

## FAQ

### Is Chatgpt 4o Latest 20250326 better than Muse Glimmer?

Chatgpt 4o Latest 20250326 is the stronger model overall, scoring 43.2 to 41.3 on the Noometry Index.

### Is Chatgpt 4o Latest 20250326 or Muse Glimmer better for coding?

Chatgpt 4o Latest 20250326 scores higher on coding benchmarks: 41.0 versus 38.7 in the Noometry coding category.

### How many benchmarks do Chatgpt 4o Latest 20250326 and Muse Glimmer share?

12 benchmarks have published results for both models. Chatgpt 4o Latest 20250326 has 21 scored results on Noometry and Muse Glimmer has 13.