# GPT-4.1 mini vs GPT-5.5 Instant

> GPT-5.5 Instant is the stronger model overall, scoring 42.7 to 33.6 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-4-1-mini-vs-gpt-5-5-instant
- Last updated: 2026-10-10
- Shared benchmarks: 25

## Summary

- They share 25 benchmarks with published results for both. GPT-4.1 mini scores higher in 0 categories and GPT-5.5 Instant in 9 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where GPT-5.5 Instant leads 48.9 to 34.7.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 44.7% for GPT-4.1 mini and 68.1% for GPT-5.5 Instant.

## Snapshot

| | GPT-4.1 mini | GPT-5.5 Instant |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Noometry Index | 33.6 | 42.7 |
| Rank | 240 | 110 |
| Context | 1.05M | — |
| Input $/M | $0.40 | — |
| Output $/M | $1.60 | — |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-4.1 mini: 30.6 (#293)
- GPT-5.5 Instant: 44.3 (#74)

| Benchmark | GPT-4.1 mini | GPT-5.5 Instant |
|---|---|---|
| SciCode | 40.4% | 48.6% |
| LMArena Coding | 1367 | 1433 |
| SWE-bench Verified (bash only) | 23.9% | — |
| Aider Polyglot | 32.4% | — |
| WeirdML | 37.6% | — |
| BigCodeBench Instruct | 48.9% | — |
| CadEval | 16% | — |

## Agentic & Tool Use

- GPT-4.1 mini: 33.3 (#55)
- GPT-5.5 Instant: —

| Benchmark | GPT-4.1 mini | GPT-5.5 Instant |
|---|---|---|
| Berkeley Function Calling Leaderboard | 50.5% | — |

## Reasoning

- GPT-4.1 mini: 10.8 (#340)
- GPT-5.5 Instant: 24.9 (#155)

| Benchmark | GPT-4.1 mini | GPT-5.5 Instant |
|---|---|---|
| CritPt | 0% | 0% |
| Chess Puzzles | 7% | 12% |
| LMArena Hard Prompts | 1349 | 1426 |
| Epoch Capabilities Index | 135.01 | 142.52 |
| ARC-AGI-2 | 0% | — |
| Kagi LLM Benchmark | 48.6% | — |
| ARC-AGI-1 | 3.5% | — |
| Mystery Game Puzzles | 7% | — |
| DTBench | 68.8% | — |
| LMCA | 21.1% | — |

## Math

- GPT-4.1 mini: 24.1 (#270)
- GPT-5.5 Instant: 26.5 (#259)

| Benchmark | GPT-4.1 mini | GPT-5.5 Instant |
|---|---|---|
| FrontierMath (Tiers 1-3) | 6.7% | 26.3% |
| OTIS Mock AIME 2024-2025 | 44.7% | 68.1% |
| LMArena Math | 1343 | 1420 |
| FrontierMath Tier 4 | — | 2.4% |
| Omni-MATH | 49.1% | — |
| MATH Level 5 | 87.3% | — |
| FrontierMath (Feb 2025 set) | 4.5% | — |

## Knowledge

- GPT-4.1 mini: 34.7 (#194)
- GPT-5.5 Instant: 48.9 (#74)

| Benchmark | GPT-4.1 mini | GPT-5.5 Instant |
|---|---|---|
| GPQA Diamond | 65.8% | 82.5% |
| LMArena Expert | 1338 | 1409 |
| SimpleQA Verified | 12.7% | — |
| MMLU-Pro | 78.3% | — |
| GPQA (HELM) | 61.4% | — |

## Multimodal

- GPT-4.1 mini: 35.8 (#82)
- GPT-5.5 Instant: 40.0 (#52)

| Benchmark | GPT-4.1 mini | GPT-5.5 Instant |
|---|---|---|
| LMArena Vision | 1181 | 1250 |
| LMArena Document | — | 1403 |

## Multilingual

- GPT-4.1 mini: 45.7 (#166)
- GPT-5.5 Instant: 52.8 (#80)

| Benchmark | GPT-4.1 mini | GPT-5.5 Instant |
|---|---|---|
| LMArena Non-English | 1318 | 1417 |
| LMArena Chinese | 1329 | 1456 |
| LMArena French | 1358 | 1428 |
| LMArena German | 1351 | 1411 |
| LMArena Japanese | 1290 | 1408 |
| LMArena Korean | 1298 | 1392 |
| LMArena Russian | 1324 | 1431 |
| LMArena Spanish | 1319 | 1429 |

## Instruction Following

- GPT-4.1 mini: 73.7 (#118)
- GPT-5.5 Instant: 74.2 (#100)

| Benchmark | GPT-4.1 mini | GPT-5.5 Instant |
|---|---|---|
| LMArena Instruction Following | 1333 | 1406 |
| IFEval | 90.4% | — |

## Long Context

- GPT-4.1 mini: 31.8 (#275)
- GPT-5.5 Instant: 43.4 (#96)

| Benchmark | GPT-4.1 mini | GPT-5.5 Instant |
|---|---|---|
| LMArena Longer Query | 1344 | 1422 |
| Fiction.LiveBench | 44.4% | — |

## Writing & Preference

- GPT-4.1 mini: 48.6 (#199)
- GPT-5.5 Instant: 61.8 (#85)

| Benchmark | GPT-4.1 mini | GPT-5.5 Instant |
|---|---|---|
| LMArena Text | 1340 | 1419 |
| LMArena Creative Writing | 1300 | 1419 |
| LMArena Multi-Turn | 1354 | 1433 |
| EQ-Bench Creative Writing | 1147 | — |
| WildBench | 83.8% | — |

## FAQ

### Is GPT-4.1 mini better than GPT-5.5 Instant?

GPT-5.5 Instant is the stronger model overall, scoring 42.7 to 33.6 on the Noometry Index.

### Is GPT-4.1 mini or GPT-5.5 Instant better for coding?

GPT-5.5 Instant scores higher on coding benchmarks: 44.3 versus 30.6 in the Noometry coding category.

### How many benchmarks do GPT-4.1 mini and GPT-5.5 Instant share?

25 benchmarks have published results for both models. GPT-4.1 mini has 47 scored results on Noometry and GPT-5.5 Instant has 27.