# Grok 4.1 Fast vs MiniMax-M2.5

> Grok 4.1 Fast is the stronger model overall, scoring 41.4 to 38.3 on the Noometry Index.

- Canonical page: https://noometry.com/compare/grok-4-1-fast-vs-minimax-m2-5
- Last updated: 2026-10-10
- Shared benchmarks: 24

## Summary

- They share 24 benchmarks with published results for both. Grok 4.1 Fast scores higher in 7 categories and MiniMax-M2.5 in 2 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.1 Fast leads 43.4 to 17.5.
- The biggest single-benchmark swing is NYT Connections (extended): 87.4% for Grok 4.1 Fast and 16.8% for MiniMax-M2.5.
- Grok 4.1 Fast is cheaper at $0.20 / $0.50 per million input/output tokens, against $0.30 / $1.20 for MiniMax-M2.5.
- MiniMax-M2.5 accepts more context: 205K tokens versus 128K.
- MiniMax-M2.5 has downloadable open weights; the other is API-only.

## Snapshot

| | Grok 4.1 Fast | MiniMax-M2.5 |
|---|---|---|
| Provider | xAI | MiniMax |
| Noometry Index | 41.4 | 38.3 |
| Rank | 136 | 188 |
| Context | 128K | 205K |
| Input $/M | $0.20 | $0.30 |
| Output $/M | $0.50 | $1.20 |
| Weights | Proprietary | Open |

## Coding

- Grok 4.1 Fast: 34.1 (#245)
- MiniMax-M2.5: 48.1 (#58)

| Benchmark | Grok 4.1 Fast | MiniMax-M2.5 |
|---|---|---|
| LMArena WebDev | 1242 | 1387 |
| LMArena Coding | 1411 | 1381 |
| ALE-Bench | 394.93 | 618.17 |
| SWE-bench Verified (bash only) | — | 75.8% |
| SWE-bench Multilingual | — | 68.3% |

## Agentic & Tool Use

- Grok 4.1 Fast: 36.3 (#39)
- MiniMax-M2.5: 30.4 (#77)

| Benchmark | Grok 4.1 Fast | MiniMax-M2.5 |
|---|---|---|
| Vending-Bench 2 | 1,107 | -23.16 |
| Terminal-Bench | — | 42.7% |
| Berkeley Function Calling Leaderboard | 69.6% | — |
| τ²-bench Banking | 13.1% | — |
| LMArena Search | 1171 | — |

## Reasoning

- Grok 4.1 Fast: 43.4 (#49)
- MiniMax-M2.5: 17.5 (#292)

| Benchmark | Grok 4.1 Fast | MiniMax-M2.5 |
|---|---|---|
| NYT Connections (extended) | 87.4% | 16.8% |
| LMArena Hard Prompts | 1407 | 1372 |
| ARC-AGI-2 | — | 4.9% |
| SimpleBench | 56% | — |
| Kagi LLM Benchmark | — | 55.2% |
| ARC-AGI-1 | — | 63.7% |
| DTBench | 87.7% | — |
| Epoch Capabilities Index | — | 146.68 |
| ForecastBench | 61 | — |

## Math

- Grok 4.1 Fast: 31.9 (#221)
- MiniMax-M2.5: 26.9 (#253)

| Benchmark | Grok 4.1 Fast | MiniMax-M2.5 |
|---|---|---|
| ProofBench | 4% | 4% |
| LMArena Math | 1408 | 1378 |
| MathArena Final-Answer Competitions | 60.9% | — |

## Knowledge

- Grok 4.1 Fast: 33.1 (#207)
- MiniMax-M2.5: 39.2 (#135)

| Benchmark | Grok 4.1 Fast | MiniMax-M2.5 |
|---|---|---|
| Vectara Hallucination Rate | 17.8% | 9.1% |
| LMArena Expert | 1399 | 1379 |

## Multimodal

- Grok 4.1 Fast: 37.0 (#76)
- MiniMax-M2.5: —

| Benchmark | Grok 4.1 Fast | MiniMax-M2.5 |
|---|---|---|
| LMArena Vision | 1201 | — |

## Multilingual

- Grok 4.1 Fast: 51.0 (#114)
- MiniMax-M2.5: 47.1 (#152)

| Benchmark | Grok 4.1 Fast | MiniMax-M2.5 |
|---|---|---|
| LMArena Non-English | 1391 | 1338 |
| LMArena Chinese | 1441 | 1393 |
| LMArena French | 1415 | 1362 |
| LMArena German | 1404 | 1362 |
| LMArena Japanese | 1349 | 1171 |
| LMArena Korean | 1361 | 1232 |
| LMArena Russian | 1387 | 1358 |
| LMArena Spanish | 1413 | 1354 |

## Instruction Following

- Grok 4.1 Fast: 72.7 (#133)
- MiniMax-M2.5: 71.5 (#148)

| Benchmark | Grok 4.1 Fast | MiniMax-M2.5 |
|---|---|---|
| LMArena Instruction Following | 1376 | 1353 |

## Long Context

- Grok 4.1 Fast: 42.4 (#126)
- MiniMax-M2.5: 37.5 (#216)

| Benchmark | Grok 4.1 Fast | MiniMax-M2.5 |
|---|---|---|
| LMArena Longer Query | 1390 | 1366 |
| CL-bench | — | 11.4% |
| CL-bench Life | — | 6.3% |

## Writing & Preference

- Grok 4.1 Fast: 57.2 (#131)
- MiniMax-M2.5: 53.9 (#153)

| Benchmark | Grok 4.1 Fast | MiniMax-M2.5 |
|---|---|---|
| LMArena Text | 1408 | 1359 |
| LMArena Creative Writing | 1394 | 1331 |
| EQ-Bench Creative Writing | 1327 | 1361 |
| LMArena Multi-Turn | 1389 | 1364 |

## FAQ

### Is Grok 4.1 Fast better than MiniMax-M2.5?

Grok 4.1 Fast is the stronger model overall, scoring 41.4 to 38.3 on the Noometry Index.

### Which is cheaper, Grok 4.1 Fast or MiniMax-M2.5?

Grok 4.1 Fast is cheaper. It lists at $0.20 per million input tokens and $0.50 per million output tokens; MiniMax-M2.5 lists at $0.30 and $1.20.

### Is Grok 4.1 Fast or MiniMax-M2.5 better for coding?

MiniMax-M2.5 scores higher on coding benchmarks: 48.1 versus 34.1 in the Noometry coding category.

### Which has the bigger context window?

MiniMax-M2.5 does, with 205K tokens against 128K.

### How many benchmarks do Grok 4.1 Fast and MiniMax-M2.5 share?

24 benchmarks have published results for both models. Grok 4.1 Fast has 32 scored results on Noometry and MiniMax-M2.5 has 33.