# GPT-5.5 Pro vs Magistral Medium

> GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 34.8 on the Noometry Index. Magistral Medium costs 25× less per token, which makes it the better buy when GPT-5.5 Pro's lead doesn't matter for your workload.

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

## Summary

- They share 3 benchmarks with published results for both. GPT-5.5 Pro scores higher in 3 categories and Magistral Medium in 0 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where GPT-5.5 Pro leads 73.6 to 8.7.
- The biggest single-benchmark swing is ARC-AGI-1: 96.5% for GPT-5.5 Pro and 6.1% for Magistral Medium.
- Magistral Medium is cheaper at $2 / $5 per million input/output tokens, against $30 / $180 for GPT-5.5 Pro.
- GPT-5.5 Pro accepts more context: 1.05M tokens versus 128K.
- Magistral Medium has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-5.5 Pro | Magistral Medium |
|---|---|---|
| Provider | OpenAI | Mistral AI |
| Noometry Index | 64.3 | 34.8 |
| Rank | 7 | 224 |
| Context | 1.05M | 128K |
| Input $/M | $30 | $2 |
| Output $/M | $180 | $5 |
| Weights | Proprietary | Open |

## Coding

- GPT-5.5 Pro: —
- Magistral Medium: 38.6 (#161)

| Benchmark | GPT-5.5 Pro | Magistral Medium |
|---|---|---|
| SciCode | — | 39.2% |
| LMArena Coding | — | 1319 |

## Reasoning

- GPT-5.5 Pro: 73.6 (#7)
- Magistral Medium: 8.7 (#342)

| Benchmark | GPT-5.5 Pro | Magistral Medium |
|---|---|---|
| ARC-AGI-2 | 84.6% | 0% |
| ARC-AGI-1 | 96.5% | 6.1% |
| CritPt | 30.6% | 0.3% |
| SimpleBench | 76.9% | — |
| Kagi LLM Benchmark | — | 16.2% |
| Chess Puzzles | 64% | — |
| LMArena Hard Prompts | — | 1267 |
| DTBench | 96% | — |
| LMCA | 53.9% | — |
| Epoch Capabilities Index | 162.45 | — |

## Math

- GPT-5.5 Pro: 83.8 (#8)
- Magistral Medium: 32.4 (#187)

| Benchmark | GPT-5.5 Pro | Magistral Medium |
|---|---|---|
| FrontierMath (Tiers 1-3) | 87.7% | — |
| FrontierMath Tier 4 | 78% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| LMArena Math | — | 1249 |
| FrontierMath (Feb 2025 set) | 52.4% | — |
| FrontierMath Tier 4 (v1) | 39.6% | — |

## Knowledge

- GPT-5.5 Pro: 64.2 (#17)
- Magistral Medium: 32.9 (#199)

| Benchmark | GPT-5.5 Pro | Magistral Medium |
|---|---|---|
| GPQA Diamond | 93.9% | — |
| LMArena Expert | — | 1222 |

## Multilingual

- GPT-5.5 Pro: —
- Magistral Medium: 39.8 (#219)

| Benchmark | GPT-5.5 Pro | Magistral Medium |
|---|---|---|
| LMArena Non-English | — | 1232 |
| LMArena Chinese | — | 1225 |
| LMArena French | — | 1268 |
| LMArena German | — | 1248 |
| LMArena Japanese | — | 1176 |
| LMArena Korean | — | 1125 |
| LMArena Russian | — | 1224 |
| LMArena Spanish | — | 1269 |

## Instruction Following

- GPT-5.5 Pro: —
- Magistral Medium: 66.2 (#207)

| Benchmark | GPT-5.5 Pro | Magistral Medium |
|---|---|---|
| LMArena Instruction Following | — | 1254 |

## Long Context

- GPT-5.5 Pro: —
- Magistral Medium: 39.3 (#178)

| Benchmark | GPT-5.5 Pro | Magistral Medium |
|---|---|---|
| LMArena Longer Query | — | 1295 |

## Writing & Preference

- GPT-5.5 Pro: —
- Magistral Medium: 46.5 (#214)

| Benchmark | GPT-5.5 Pro | Magistral Medium |
|---|---|---|
| LMArena Text | — | 1255 |
| LMArena Creative Writing | — | 1245 |
| LMArena Multi-Turn | — | 1275 |

## FAQ

### Is GPT-5.5 Pro better than Magistral Medium?

GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 34.8 on the Noometry Index. Magistral Medium costs 25× less per token, which makes it the better buy when GPT-5.5 Pro's lead doesn't matter for your workload.

### Which is cheaper, GPT-5.5 Pro or Magistral Medium?

Magistral Medium is cheaper. It lists at $2 per million input tokens and $5 per million output tokens; GPT-5.5 Pro lists at $30 and $180.

### Which has the bigger context window?

GPT-5.5 Pro does, with 1.05M tokens against 128K.

### How many benchmarks do GPT-5.5 Pro and Magistral Medium share?

3 benchmarks have published results for both models. GPT-5.5 Pro has 14 scored results on Noometry and Magistral Medium has 22.