# GPT-6 Astra vs MiniMax-M2.5

> GPT-6 Astra is the stronger model overall, scoring 70.8 to 38.3 on the Noometry Index. MiniMax-M2.5 costs 38× less per token, which makes it the better buy when GPT-6 Astra's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/gpt-6-astra-vs-minimax-m2-5
- Last updated: 2026-10-10
- Shared benchmarks: 27

## Summary

- They share 27 benchmarks with published results for both. GPT-6 Astra scores higher in 9 categories and MiniMax-M2.5 in 0 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where GPT-6 Astra leads 85.1 to 17.5.
- The biggest single-benchmark swing is ProofBench: 99% for GPT-6 Astra and 4% for MiniMax-M2.5.
- MiniMax-M2.5 is cheaper at $0.30 / $1.20 per million input/output tokens, against $10 / $50 for GPT-6 Astra.
- GPT-6 Astra accepts more context: 1.05M tokens versus 205K.
- MiniMax-M2.5 has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-6 Astra | MiniMax-M2.5 |
|---|---|---|
| Provider | OpenAI | MiniMax |
| Noometry Index | 70.8 | 38.3 |
| Rank | 1 | 188 |
| Context | 1.05M | 205K |
| Input $/M | $10 | $0.30 |
| Output $/M | $50 | $1.20 |
| Weights | Proprietary | Open |

## Coding

- GPT-6 Astra: 73.7 (#2)
- MiniMax-M2.5: 48.1 (#58)

| Benchmark | GPT-6 Astra | MiniMax-M2.5 |
|---|---|---|
| LMArena WebDev | 1786 | 1387 |
| LMArena Coding | 1487 | 1381 |
| ALE-Bench | 2,951 | 618.17 |
| DeepSWE | 74.1% | — |
| FrontierCode | 53.3% | — |
| SWE-bench Verified (bash only) | — | 75.8% |
| SWE-bench Multilingual | — | 68.3% |
| FrontierSWE | 65.5% | — |
| SciCode | 56.5% | — |
| GSO | 79.4% | — |
| WeirdML | 93.6% | — |
| MirrorCode | 46.7% | — |

## Agentic & Tool Use

- GPT-6 Astra: 52.9 (#3)
- MiniMax-M2.5: 30.4 (#77)

| Benchmark | GPT-6 Astra | MiniMax-M2.5 |
|---|---|---|
| Vending-Bench 2 | 15,515 | -23.16 |
| Terminal-Bench | — | 42.7% |
| APEX-Agents | 64.7% | — |
| Remote Labor Index | 20.8% | — |
| BALROG | 68.3% | — |
| GDP.pdf | 34.2% | — |

## Reasoning

- GPT-6 Astra: 85.1 (#1)
- MiniMax-M2.5: 17.5 (#292)

| Benchmark | GPT-6 Astra | MiniMax-M2.5 |
|---|---|---|
| ARC-AGI-2 | 95% | 4.9% |
| NYT Connections (extended) | 98.1% | 16.8% |
| ARC-AGI-1 | 98.5% | 63.7% |
| LMArena Hard Prompts | 1462 | 1372 |
| Epoch Capabilities Index | 166.45 | 146.68 |
| Kagi LLM Benchmark | — | 55.2% |
| CritPt | 31.7% | — |
| Chess Puzzles | 72% | — |
| EBR-Bench | 76.2% | — |
| Mystery Game Puzzles | 84% | — |
| DTBench | 97.3% | — |
| LMCA | 64.4% | — |
| Bench to the Future 3 | 0.14 | — |

## Math

- GPT-6 Astra: 93.5 (#2)
- MiniMax-M2.5: 26.9 (#253)

| Benchmark | GPT-6 Astra | MiniMax-M2.5 |
|---|---|---|
| ProofBench | 99% | 4% |
| LMArena Math | 1465 | 1378 |
| FrontierMath (Tiers 1-3) | 93.7% | — |
| FrontierMath Tier 4 | 97.6% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| FrontierMath Erdős | 2.9% | — |

## Knowledge

- GPT-6 Astra: 75.3 (#1)
- MiniMax-M2.5: 39.2 (#135)

| Benchmark | GPT-6 Astra | MiniMax-M2.5 |
|---|---|---|
| Vectara Hallucination Rate | 8.7% | 9.1% |
| LMArena Expert | 1483 | 1379 |
| GPQA Diamond | 95.8% | — |
| Humanity's Last Exam | 54.8% | — |
| SimpleQA Verified | 75.6% | — |

## Multimodal

- GPT-6 Astra: 55.0 (#3)
- MiniMax-M2.5: —

| Benchmark | GPT-6 Astra | MiniMax-M2.5 |
|---|---|---|
| LMArena Vision | 1281 | — |
| Blueprint-Bench 2 | 49.7% | — |
| Furniture Assembly | 80% | — |
| LMArena Document | 1468 | — |

## Multilingual

- GPT-6 Astra: 53.7 (#61)
- MiniMax-M2.5: 47.1 (#152)

| Benchmark | GPT-6 Astra | MiniMax-M2.5 |
|---|---|---|
| LMArena Non-English | 1430 | 1338 |
| LMArena Chinese | 1484 | 1393 |
| LMArena French | 1456 | 1362 |
| LMArena German | 1440 | 1362 |
| LMArena Japanese | 1379 | 1171 |
| LMArena Korean | 1426 | 1232 |
| LMArena Russian | 1436 | 1358 |
| LMArena Spanish | 1407 | 1354 |

## Instruction Following

- GPT-6 Astra: 76.3 (#44)
- MiniMax-M2.5: 71.5 (#148)

| Benchmark | GPT-6 Astra | MiniMax-M2.5 |
|---|---|---|
| LMArena Instruction Following | 1450 | 1353 |

## Long Context

- GPT-6 Astra: 44.5 (#62)
- MiniMax-M2.5: 37.5 (#216)

| Benchmark | GPT-6 Astra | MiniMax-M2.5 |
|---|---|---|
| LMArena Longer Query | 1456 | 1366 |
| CL-bench | — | 11.4% |
| CL-bench Life | — | 6.3% |

## Writing & Preference

- GPT-6 Astra: 75.3 (#7)
- MiniMax-M2.5: 53.9 (#153)

| Benchmark | GPT-6 Astra | MiniMax-M2.5 |
|---|---|---|
| LMArena Text | 1441 | 1359 |
| LMArena Creative Writing | 1418 | 1331 |
| EQ-Bench Creative Writing | 2173 | 1361 |
| LMArena Multi-Turn | 1448 | 1364 |

## FAQ

### Is GPT-6 Astra better than MiniMax-M2.5?

GPT-6 Astra is the stronger model overall, scoring 70.8 to 38.3 on the Noometry Index. MiniMax-M2.5 costs 38× less per token, which makes it the better buy when GPT-6 Astra's lead doesn't matter for your workload.

### Which is cheaper, GPT-6 Astra 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-6 Astra lists at $10 and $50.

### Is GPT-6 Astra or MiniMax-M2.5 better for coding?

GPT-6 Astra scores higher on coding benchmarks: 73.7 versus 48.1 in the Noometry coding category.

### Which has the bigger context window?

GPT-6 Astra does, with 1.05M tokens against 205K.

### How many benchmarks do GPT-6 Astra and MiniMax-M2.5 share?

27 benchmarks have published results for both models. GPT-6 Astra has 56 scored results on Noometry and MiniMax-M2.5 has 33.