# GPT-4.1 mini vs GPT-5.5 Pro

> GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 33.6 on the Noometry Index. GPT-4.1 mini costs 96× 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-4-1-mini-vs-gpt-5-5-pro
- Last updated: 2026-10-10
- Shared benchmarks: 11

## Summary

- They share 11 benchmarks with published results for both. GPT-4.1 mini scores higher in 0 categories and GPT-5.5 Pro in 3 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where GPT-5.5 Pro leads 73.3 to 10.8.
- The biggest single-benchmark swing is ARC-AGI-1: 3.5% for GPT-4.1 mini and 96.5% for GPT-5.5 Pro.
- GPT-4.1 mini is cheaper at $0.40 / $1.60 per million input/output tokens, against $30 / $180 for GPT-5.5 Pro.
- GPT-5.5 Pro accepts more context: 1.05M tokens versus 1.05M.

## Snapshot

| | GPT-4.1 mini | GPT-5.5 Pro |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Noometry Index | 33.6 | 64.3 |
| Rank | 240 | 8 |
| Context | 1.05M | 1.05M |
| Input $/M | $0.40 | $30 |
| Output $/M | $1.60 | $180 |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-4.1 mini: 30.6 (#293)
- GPT-5.5 Pro: —

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

## Agentic & Tool Use

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

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

## Reasoning

- GPT-4.1 mini: 10.8 (#340)
- GPT-5.5 Pro: 73.3 (#10)

| Benchmark | GPT-4.1 mini | GPT-5.5 Pro |
|---|---|---|
| ARC-AGI-2 | 0% | 84.6% |
| ARC-AGI-1 | 3.5% | 96.5% |
| CritPt | 0% | 30.6% |
| Chess Puzzles | 7% | 64% |
| DTBench | 68.8% | 96% |
| LMCA | 21.1% | 53.9% |
| Epoch Capabilities Index | 135.01 | 162.07 |
| SimpleBench | — | 76.9% |
| Kagi LLM Benchmark | 48.6% | — |
| LMArena Hard Prompts | 1349 | — |
| Mystery Game Puzzles | 7% | — |

## Math

- GPT-4.1 mini: 24.1 (#270)
- GPT-5.5 Pro: 84.0 (#10)

| Benchmark | GPT-4.1 mini | GPT-5.5 Pro |
|---|---|---|
| FrontierMath (Tiers 1-3) | 6.7% | 87.7% |
| OTIS Mock AIME 2024-2025 | 44.7% | 100% |
| FrontierMath (Feb 2025 set) | 4.5% | 52.4% |
| FrontierMath Tier 4 | — | 78% |
| Omni-MATH | 49.1% | — |
| LMArena Math | 1343 | — |
| MATH Level 5 | 87.3% | — |
| FrontierMath Tier 4 (v1) | — | 39.6% |

## Knowledge

- GPT-4.1 mini: 34.7 (#194)
- GPT-5.5 Pro: 64.1 (#19)

| Benchmark | GPT-4.1 mini | GPT-5.5 Pro |
|---|---|---|
| GPQA Diamond | 65.8% | 93.9% |
| SimpleQA Verified | 12.7% | — |
| MMLU-Pro | 78.3% | — |
| GPQA (HELM) | 61.4% | — |
| LMArena Expert | 1338 | — |

## Multimodal

- GPT-4.1 mini: 35.8 (#82)
- GPT-5.5 Pro: —

| Benchmark | GPT-4.1 mini | GPT-5.5 Pro |
|---|---|---|
| LMArena Vision | 1181 | — |

## Multilingual

- GPT-4.1 mini: 45.7 (#166)
- GPT-5.5 Pro: —

| Benchmark | GPT-4.1 mini | GPT-5.5 Pro |
|---|---|---|
| LMArena Non-English | 1318 | — |
| LMArena Chinese | 1329 | — |
| LMArena French | 1358 | — |
| LMArena German | 1351 | — |
| LMArena Japanese | 1290 | — |
| LMArena Korean | 1298 | — |
| LMArena Russian | 1324 | — |
| LMArena Spanish | 1319 | — |

## Instruction Following

- GPT-4.1 mini: 73.7 (#118)
- GPT-5.5 Pro: —

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

## Long Context

- GPT-4.1 mini: 31.8 (#275)
- GPT-5.5 Pro: —

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

## Writing & Preference

- GPT-4.1 mini: 48.6 (#199)
- GPT-5.5 Pro: —

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

## FAQ

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

GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 33.6 on the Noometry Index. GPT-4.1 mini costs 96× 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-4.1 mini or GPT-5.5 Pro?

GPT-4.1 mini is cheaper. It lists at $0.40 per million input tokens and $1.60 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 1.05M.

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

11 benchmarks have published results for both models. GPT-4.1 mini has 47 scored results on Noometry and GPT-5.5 Pro has 14.