# GPT-5.5 Instant vs MiMo-V2.6-Pro

> MiMo-V2.6-Pro is the stronger model overall, scoring 46.7 to 42.5 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-5-5-instant-vs-mimo-v2-6-pro
- Last updated: 2026-10-10
- Shared benchmarks: 13

## Summary

- They share 13 benchmarks with published results for both. GPT-5.5 Instant scores higher in 1 category and MiMo-V2.6-Pro in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where MiMo-V2.6-Pro leads 37.9 to 26.1.
- MiMo-V2.6-Pro has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-5.5 Instant | MiMo-V2.6-Pro |
|---|---|---|
| Provider | OpenAI | Xiaomi |
| Noometry Index | 42.5 | 46.7 |
| Rank | 99 | 55 |
| Context | — | 1.05M |
| Input $/M | — | $0.43 |
| Output $/M | — | $0.87 |
| Weights | Proprietary | Open |

## Coding

- GPT-5.5 Instant: 43.7 (#73)
- MiMo-V2.6-Pro: 53.2 (#27)

| Benchmark | GPT-5.5 Instant | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Coding | 1433 | 1538 |
| LMArena WebDev | — | 1618 |
| SciCode | 48.6% | — |

## Reasoning

- GPT-5.5 Instant: 24.2 (#149)
- MiMo-V2.6-Pro: 30.4 (#76)

| Benchmark | GPT-5.5 Instant | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Hard Prompts | 1426 | 1511 |
| CritPt | 0% | — |
| Chess Puzzles | 12% | — |
| Epoch Capabilities Index | 142.48 | — |

## Math

- GPT-5.5 Instant: 26.1 (#241)
- MiMo-V2.6-Pro: 37.9 (#91)

| Benchmark | GPT-5.5 Instant | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Math | 1420 | 1497 |
| FrontierMath (Tiers 1-3) | 26.3% | — |
| FrontierMath Tier 4 | 2.4% | — |
| OTIS Mock AIME 2024-2025 | 68.1% | — |

## Knowledge

- GPT-5.5 Instant: 48.9 (#68)
- MiMo-V2.6-Pro: 43.0 (#85)

| Benchmark | GPT-5.5 Instant | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Expert | 1409 | 1548 |
| GPQA Diamond | 82.5% | — |

## Multimodal

- GPT-5.5 Instant: 39.3 (#48)
- MiMo-V2.6-Pro: 40.2 (#40)

| Benchmark | GPT-5.5 Instant | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Vision | 1250 | 1265 |
| LMArena Document | 1403 | — |

## Multilingual

- GPT-5.5 Instant: 53.0 (#76)
- MiMo-V2.6-Pro: 57.0 (#15)

| Benchmark | GPT-5.5 Instant | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Non-English | 1417 | 1474 |
| LMArena Chinese | 1457 | 1532 |
| LMArena Russian | 1430 | 1481 |
| LMArena French | 1428 | — |
| LMArena German | 1410 | — |
| LMArena Japanese | 1408 | — |
| LMArena Korean | 1393 | — |
| LMArena Spanish | 1430 | — |

## Instruction Following

- GPT-5.5 Instant: 74.4 (#94)
- MiMo-V2.6-Pro: 78.2 (#10)

| Benchmark | GPT-5.5 Instant | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Instruction Following | 1407 | 1490 |

## Long Context

- GPT-5.5 Instant: 43.4 (#92)
- MiMo-V2.6-Pro: 46.0 (#26)

| Benchmark | GPT-5.5 Instant | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Longer Query | 1422 | 1500 |

## Writing & Preference

- GPT-5.5 Instant: 62.0 (#81)
- MiMo-V2.6-Pro: 66.9 (#32)

| Benchmark | GPT-5.5 Instant | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Text | 1419 | 1491 |
| LMArena Creative Writing | 1420 | 1465 |
| LMArena Multi-Turn | 1434 | 1463 |

## FAQ

### Is GPT-5.5 Instant better than MiMo-V2.6-Pro?

MiMo-V2.6-Pro is the stronger model overall, scoring 46.7 to 42.5 on the Noometry Index.

### Is GPT-5.5 Instant or MiMo-V2.6-Pro better for coding?

MiMo-V2.6-Pro scores higher on coding benchmarks: 53.2 versus 43.7 in the Noometry coding category.

### How many benchmarks do GPT-5.5 Instant and MiMo-V2.6-Pro share?

13 benchmarks have published results for both models. GPT-5.5 Instant has 27 scored results on Noometry and MiMo-V2.6-Pro has 14.