# GPT-5.5 Instant vs Mistral

> GPT-5.5 Instant is the stronger model overall, scoring 42.7 to 29.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-5-5-instant-vs-mistral
- Last updated: 2026-10-10
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. GPT-5.5 Instant scores higher in 8 categories and Mistral in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where GPT-5.5 Instant leads 48.9 to 16.6.

## Snapshot

| | GPT-5.5 Instant | Mistral |
|---|---|---|
| Provider | OpenAI | Mistral AI |
| Noometry Index | 42.7 | 29.9 |
| Rank | 110 | 303 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-5.5 Instant: 44.3 (#74)
- Mistral: 33.8 (#250)

| Benchmark | GPT-5.5 Instant | Mistral |
|---|---|---|
| LMArena Coding | 1433 | 1162 |
| SciCode | 48.6% | — |

## Reasoning

- GPT-5.5 Instant: 24.9 (#155)
- Mistral: 22.2 (#200)

| Benchmark | GPT-5.5 Instant | Mistral |
|---|---|---|
| LMArena Hard Prompts | 1426 | 1149 |
| CritPt | 0% | — |
| Chess Puzzles | 12% | — |
| Epoch Capabilities Index | 142.52 | — |

## Math

- GPT-5.5 Instant: 26.5 (#259)
- Mistral: 22.3 (#278)

| Benchmark | GPT-5.5 Instant | Mistral |
|---|---|---|
| LMArena Math | 1420 | 1180 |
| FrontierMath (Tiers 1-3) | 26.3% | — |
| FrontierMath Tier 4 | 2.4% | — |
| OTIS Mock AIME 2024-2025 | 68.1% | — |
| Omni-MATH | — | 7.2% |

## Knowledge

- GPT-5.5 Instant: 48.9 (#74)
- Mistral: 16.6 (#288)

| Benchmark | GPT-5.5 Instant | Mistral |
|---|---|---|
| LMArena Expert | 1409 | 1125 |
| GPQA Diamond | 82.5% | — |
| MMLU-Pro | — | 27.7% |
| GPQA (HELM) | — | 30.3% |

## Multimodal

- GPT-5.5 Instant: 40.0 (#52)
- Mistral: —

| Benchmark | GPT-5.5 Instant | Mistral |
|---|---|---|
| LMArena Vision | 1250 | — |
| LMArena Document | 1403 | — |

## Multilingual

- GPT-5.5 Instant: 52.8 (#80)
- Mistral: 32.8 (#254)

| Benchmark | GPT-5.5 Instant | Mistral |
|---|---|---|
| LMArena Non-English | 1417 | 1129 |
| LMArena Chinese | 1456 | 1109 |
| LMArena French | 1428 | 1180 |
| LMArena German | 1411 | 1155 |
| LMArena Japanese | 1408 | 1013 |
| LMArena Korean | 1392 | 1032 |
| LMArena Russian | 1431 | 1168 |
| LMArena Spanish | 1429 | 1143 |

## Instruction Following

- GPT-5.5 Instant: 74.2 (#100)
- Mistral: 52.6 (#288)

| Benchmark | GPT-5.5 Instant | Mistral |
|---|---|---|
| LMArena Instruction Following | 1406 | 1152 |
| IFEval | — | 56.8% |

## Long Context

- GPT-5.5 Instant: 43.4 (#96)
- Mistral: 35.0 (#245)

| Benchmark | GPT-5.5 Instant | Mistral |
|---|---|---|
| LMArena Longer Query | 1422 | 1153 |

## Writing & Preference

- GPT-5.5 Instant: 61.8 (#85)
- Mistral: 37.0 (#260)

| Benchmark | GPT-5.5 Instant | Mistral |
|---|---|---|
| LMArena Text | 1419 | 1165 |
| LMArena Creative Writing | 1419 | 1158 |
| LMArena Multi-Turn | 1433 | 1147 |
| WildBench | — | 66% |

## FAQ

### Is GPT-5.5 Instant better than Mistral?

GPT-5.5 Instant is the stronger model overall, scoring 42.7 to 29.9 on the Noometry Index.

### Is GPT-5.5 Instant or Mistral better for coding?

GPT-5.5 Instant scores higher on coding benchmarks: 44.3 versus 33.8 in the Noometry coding category.

### How many benchmarks do GPT-5.5 Instant and Mistral share?

17 benchmarks have published results for both models. GPT-5.5 Instant has 27 scored results on Noometry and Mistral has 22.