# GPT-5.5 Pro vs MiniMax-M2.5

> GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 38.3 on the Noometry Index. MiniMax-M2.5 costs 129× 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-minimax-m2-5
- Last updated: 2026-10-12
- Shared benchmarks: 3

## Summary

- They share 3 benchmarks with published results for both. GPT-5.5 Pro scores higher in 3 categories and MiniMax-M2.5 in 0 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-5.5 Pro leads 84.0 to 26.9.
- The biggest single-benchmark swing is ARC-AGI-2: 84.6% for GPT-5.5 Pro and 4.9% for MiniMax-M2.5.
- MiniMax-M2.5 is cheaper at $0.30 / $1.20 per million input/output tokens, against $30 / $180 for GPT-5.5 Pro.
- GPT-5.5 Pro accepts more context: 1.05M tokens versus 205K.
- MiniMax-M2.5 has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-5.5 Pro | MiniMax-M2.5 |
|---|---|---|
| Provider | OpenAI | MiniMax |
| Noometry Index | 64.3 | 38.3 |
| Rank | 8 | 188 |
| Context | 1.05M | 205K |
| Input $/M | $30 | $0.30 |
| Output $/M | $180 | $1.20 |
| Weights | Proprietary | Open |

## Coding

- GPT-5.5 Pro: —
- MiniMax-M2.5: 48.1 (#58)

| Benchmark | GPT-5.5 Pro | MiniMax-M2.5 |
|---|---|---|
| SWE-bench Verified (bash only) | — | 75.8% |
| LMArena WebDev | — | 1387 |
| SWE-bench Multilingual | — | 68.3% |
| LMArena Coding | — | 1381 |
| ALE-Bench | — | 618.17 |

## Agentic & Tool Use

- GPT-5.5 Pro: —
- MiniMax-M2.5: 30.4 (#77)

| Benchmark | GPT-5.5 Pro | MiniMax-M2.5 |
|---|---|---|
| Terminal-Bench | — | 42.7% |
| Vending-Bench 2 | — | -23.16 |

## Reasoning

- GPT-5.5 Pro: 73.3 (#10)
- MiniMax-M2.5: 17.5 (#292)

| Benchmark | GPT-5.5 Pro | MiniMax-M2.5 |
|---|---|---|
| ARC-AGI-2 | 84.6% | 4.9% |
| ARC-AGI-1 | 96.5% | 63.7% |
| Epoch Capabilities Index | 162.07 | 146.68 |
| SimpleBench | 76.9% | — |
| Kagi LLM Benchmark | — | 55.2% |
| NYT Connections (extended) | — | 16.8% |
| CritPt | 30.6% | — |
| Chess Puzzles | 64% | — |
| LMArena Hard Prompts | — | 1372 |
| DTBench | 96% | — |
| LMCA | 53.9% | — |

## Math

- GPT-5.5 Pro: 84.0 (#10)
- MiniMax-M2.5: 26.9 (#253)

| Benchmark | GPT-5.5 Pro | MiniMax-M2.5 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 87.7% | — |
| FrontierMath Tier 4 | 78% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| ProofBench | — | 4% |
| LMArena Math | — | 1378 |
| FrontierMath (Feb 2025 set) | 52.4% | — |
| FrontierMath Tier 4 (v1) | 39.6% | — |

## Knowledge

- GPT-5.5 Pro: 64.1 (#19)
- MiniMax-M2.5: 39.2 (#135)

| Benchmark | GPT-5.5 Pro | MiniMax-M2.5 |
|---|---|---|
| GPQA Diamond | 93.9% | — |
| Vectara Hallucination Rate | — | 9.1% |
| LMArena Expert | — | 1379 |

## Multilingual

- GPT-5.5 Pro: —
- MiniMax-M2.5: 47.1 (#152)

| Benchmark | GPT-5.5 Pro | MiniMax-M2.5 |
|---|---|---|
| LMArena Non-English | — | 1338 |
| LMArena Chinese | — | 1393 |
| LMArena French | — | 1362 |
| LMArena German | — | 1362 |
| LMArena Japanese | — | 1171 |
| LMArena Korean | — | 1232 |
| LMArena Russian | — | 1358 |
| LMArena Spanish | — | 1354 |

## Instruction Following

- GPT-5.5 Pro: —
- MiniMax-M2.5: 71.5 (#148)

| Benchmark | GPT-5.5 Pro | MiniMax-M2.5 |
|---|---|---|
| LMArena Instruction Following | — | 1353 |

## Long Context

- GPT-5.5 Pro: —
- MiniMax-M2.5: 37.5 (#216)

| Benchmark | GPT-5.5 Pro | MiniMax-M2.5 |
|---|---|---|
| CL-bench | — | 11.4% |
| CL-bench Life | — | 6.3% |
| LMArena Longer Query | — | 1366 |

## Writing & Preference

- GPT-5.5 Pro: —
- MiniMax-M2.5: 53.9 (#153)

| Benchmark | GPT-5.5 Pro | MiniMax-M2.5 |
|---|---|---|
| LMArena Text | — | 1359 |
| LMArena Creative Writing | — | 1331 |
| EQ-Bench Creative Writing | — | 1361 |
| LMArena Multi-Turn | — | 1364 |

## FAQ

### Is GPT-5.5 Pro better than MiniMax-M2.5?

GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 38.3 on the Noometry Index. MiniMax-M2.5 costs 129× 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 MiniMax-M2.5?

MiniMax-M2.5 is cheaper. It lists at $0.30 per million input tokens and $1.20 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 205K.

### How many benchmarks do GPT-5.5 Pro and MiniMax-M2.5 share?

3 benchmarks have published results for both models. GPT-5.5 Pro has 14 scored results on Noometry and MiniMax-M2.5 has 33.