# GPT-5.3 Chat vs Magistral Medium

> GPT-5.3 Chat is the stronger model overall, scoring 42.1 to 34.8 on the Noometry Index. Magistral Medium costs 1.8× less per token, which makes it the better buy when GPT-5.3 Chat's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/gpt-5-3-chat-vs-magistral-medium
- Last updated: 2026-10-10
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. GPT-5.3 Chat scores higher in 8 categories and Magistral Medium in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where GPT-5.3 Chat leads 27.3 to 8.7.
- Magistral Medium is cheaper at $2 / $5 per million input/output tokens, against $1.75 / $14 for GPT-5.3 Chat.
- Magistral Medium has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-5.3 Chat | Magistral Medium |
|---|---|---|
| Provider | OpenAI | Mistral AI |
| Noometry Index | 42.1 | 34.8 |
| Rank | 109 | 224 |
| Context | 128K | 128K |
| Input $/M | $1.75 | $2 |
| Output $/M | $14 | $5 |
| Weights | Proprietary | Open |

## Coding

- GPT-5.3 Chat: 40.8 (#124)
- Magistral Medium: 38.6 (#161)

| Benchmark | GPT-5.3 Chat | Magistral Medium |
|---|---|---|
| LMArena Coding | 1408 | 1319 |
| SciCode | — | 39.2% |

## Reasoning

- GPT-5.3 Chat: 27.3 (#105)
- Magistral Medium: 8.7 (#342)

| Benchmark | GPT-5.3 Chat | Magistral Medium |
|---|---|---|
| LMArena Hard Prompts | 1399 | 1267 |
| ARC-AGI-2 | — | 0% |
| Kagi LLM Benchmark | — | 16.2% |
| ARC-AGI-1 | — | 6.1% |
| CritPt | — | 0.3% |

## Math

- GPT-5.3 Chat: 35.4 (#146)
- Magistral Medium: 32.4 (#187)

| Benchmark | GPT-5.3 Chat | Magistral Medium |
|---|---|---|
| LMArena Math | 1389 | 1249 |

## Knowledge

- GPT-5.3 Chat: 38.2 (#137)
- Magistral Medium: 32.9 (#199)

| Benchmark | GPT-5.3 Chat | Magistral Medium |
|---|---|---|
| LMArena Expert | 1397 | 1222 |

## Multilingual

- GPT-5.3 Chat: 50.5 (#119)
- Magistral Medium: 39.8 (#219)

| Benchmark | GPT-5.3 Chat | Magistral Medium |
|---|---|---|
| LMArena Non-English | 1383 | 1232 |
| LMArena Chinese | 1433 | 1225 |
| LMArena French | 1398 | 1268 |
| LMArena German | 1384 | 1248 |
| LMArena Japanese | 1351 | 1176 |
| LMArena Korean | 1347 | 1125 |
| LMArena Russian | 1400 | 1224 |
| LMArena Spanish | 1371 | 1269 |

## Instruction Following

- GPT-5.3 Chat: 73.0 (#124)
- Magistral Medium: 66.2 (#207)

| Benchmark | GPT-5.3 Chat | Magistral Medium |
|---|---|---|
| LMArena Instruction Following | 1378 | 1254 |

## Long Context

- GPT-5.3 Chat: 42.6 (#115)
- Magistral Medium: 39.3 (#178)

| Benchmark | GPT-5.3 Chat | Magistral Medium |
|---|---|---|
| LMArena Longer Query | 1396 | 1295 |

## Writing & Preference

- GPT-5.3 Chat: 63.3 (#65)
- Magistral Medium: 46.5 (#214)

| Benchmark | GPT-5.3 Chat | Magistral Medium |
|---|---|---|
| LMArena Text | 1389 | 1255 |
| LMArena Creative Writing | 1356 | 1245 |
| LMArena Multi-Turn | 1413 | 1275 |
| EQ-Bench Creative Writing | 1690 | — |

## FAQ

### Is GPT-5.3 Chat better than Magistral Medium?

GPT-5.3 Chat is the stronger model overall, scoring 42.1 to 34.8 on the Noometry Index. Magistral Medium costs 1.8× less per token, which makes it the better buy when GPT-5.3 Chat's lead doesn't matter for your workload.

### Which is cheaper, GPT-5.3 Chat or Magistral Medium?

Magistral Medium is cheaper. It lists at $2 per million input tokens and $5 per million output tokens; GPT-5.3 Chat lists at $1.75 and $14.

### Is GPT-5.3 Chat or Magistral Medium better for coding?

GPT-5.3 Chat scores higher on coding benchmarks: 40.8 versus 38.6 in the Noometry coding category.

### Which has the bigger context window?

Both accept 128K tokens.

### How many benchmarks do GPT-5.3 Chat and Magistral Medium share?

17 benchmarks have published results for both models. GPT-5.3 Chat has 18 scored results on Noometry and Magistral Medium has 22.