# Chatgpt 4o Latest 20250326 vs Mercury

> Chatgpt 4o Latest 20250326 is the stronger model overall, scoring 43.2 to 37.3 on the Noometry Index.

- Canonical page: https://noometry.com/compare/chatgpt-4o-vs-mercury
- Last updated: 2026-10-10
- Shared benchmarks: 9

## Summary

- They share 9 benchmarks with published results for both. Chatgpt 4o Latest 20250326 scores higher in 6 categories and Mercury in 0 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Chatgpt 4o Latest 20250326 leads 62.8 to 46.2.
- The biggest single-benchmark swing is Kagi LLM Benchmark: 75% for Chatgpt 4o Latest 20250326 and 21.6% for Mercury.

## Snapshot

| | Chatgpt 4o Latest 20250326 | Mercury |
|---|---|---|
| Provider | OpenAI | Inception |
| Noometry Index | 43.2 | 37.3 |
| Rank | 84 | 192 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Proprietary | Proprietary |

## Coding

- Chatgpt 4o Latest 20250326: 41.0 (#122)
- Mercury: 38.1 (#164)

| Benchmark | Chatgpt 4o Latest 20250326 | Mercury |
|---|---|---|
| LMArena Coding | 1413 | 1323 |

## Reasoning

- Chatgpt 4o Latest 20250326: 32.8 (#64)
- Mercury: 16.8 (#288)

| Benchmark | Chatgpt 4o Latest 20250326 | Mercury |
|---|---|---|
| Kagi LLM Benchmark | 75% | 21.6% |
| LMArena Hard Prompts | 1424 | 1284 |

## Math

- Chatgpt 4o Latest 20250326: 35.8 (#134)
- Mercury: —

| Benchmark | Chatgpt 4o Latest 20250326 | Mercury |
|---|---|---|
| LMArena Math | 1407 | — |

## Knowledge

- Chatgpt 4o Latest 20250326: 38.7 (#131)
- Mercury: —

| Benchmark | Chatgpt 4o Latest 20250326 | Mercury |
|---|---|---|
| Confabulations | 16.6% | — |
| LMArena Expert | 1400 | — |

## Multimodal

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

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

## Multilingual

- Chatgpt 4o Latest 20250326: 53.1 (#72)
- Mercury: 41.7 (#201)

| Benchmark | Chatgpt 4o Latest 20250326 | Mercury |
|---|---|---|
| LMArena Non-English | 1419 | 1259 |
| LMArena Chinese | 1456 | — |
| LMArena French | 1447 | — |
| LMArena German | 1424 | — |
| LMArena Japanese | 1406 | — |
| LMArena Korean | 1397 | — |
| LMArena Russian | 1429 | — |
| LMArena Spanish | 1435 | — |

## Instruction Following

- Chatgpt 4o Latest 20250326: 74.2 (#102)
- Mercury: 65.3 (#220)

| Benchmark | Chatgpt 4o Latest 20250326 | Mercury |
|---|---|---|
| LMArena Instruction Following | 1403 | 1238 |

## Long Context

- Chatgpt 4o Latest 20250326: 43.1 (#104)
- Mercury: 38.3 (#193)

| Benchmark | Chatgpt 4o Latest 20250326 | Mercury |
|---|---|---|
| LMArena Longer Query | 1413 | 1264 |

## Writing & Preference

- Chatgpt 4o Latest 20250326: 62.8 (#68)
- Mercury: 46.2 (#216)

| Benchmark | Chatgpt 4o Latest 20250326 | Mercury |
|---|---|---|
| LMArena Text | 1429 | 1282 |
| LMArena Creative Writing | 1406 | 1186 |
| LMArena Multi-Turn | 1454 | 1283 |
| EQ-Bench Creative Writing | 1501 | — |

## FAQ

### Is Chatgpt 4o Latest 20250326 better than Mercury?

Chatgpt 4o Latest 20250326 is the stronger model overall, scoring 43.2 to 37.3 on the Noometry Index.

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

Chatgpt 4o Latest 20250326 scores higher on coding benchmarks: 41.0 versus 38.1 in the Noometry coding category.

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

9 benchmarks have published results for both models. Chatgpt 4o Latest 20250326 has 21 scored results on Noometry and Mercury has 9.