# GPT-5.3 Chat vs MiMo-V2.6-Pro

> MiMo-V2.6-Pro is the stronger model overall, scoring 46.7 to 42.1 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-5-3-chat-vs-mimo-v2-6-pro
- Last updated: 2026-10-10
- Shared benchmarks: 12

## Summary

- They share 12 benchmarks with published results for both. GPT-5.3 Chat scores higher in 0 categories and MiMo-V2.6-Pro in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in coding, where MiMo-V2.6-Pro leads 53.2 to 40.8.
- MiMo-V2.6-Pro is cheaper at $0.43 / $0.87 per million input/output tokens, against $1.75 / $14 for GPT-5.3 Chat.
- MiMo-V2.6-Pro accepts more context: 1.05M tokens versus 128K.
- MiMo-V2.6-Pro has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-5.3 Chat | MiMo-V2.6-Pro |
|---|---|---|
| Provider | OpenAI | Xiaomi |
| Noometry Index | 42.1 | 46.7 |
| Rank | 109 | 55 |
| Context | 128K | 1.05M |
| Input $/M | $1.75 | $0.43 |
| Output $/M | $14 | $0.87 |
| Weights | Proprietary | Open |

## Coding

- GPT-5.3 Chat: 40.8 (#124)
- MiMo-V2.6-Pro: 53.2 (#27)

| Benchmark | GPT-5.3 Chat | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Coding | 1408 | 1538 |
| LMArena WebDev | — | 1618 |

## Reasoning

- GPT-5.3 Chat: 27.3 (#105)
- MiMo-V2.6-Pro: 30.4 (#76)

| Benchmark | GPT-5.3 Chat | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Hard Prompts | 1399 | 1511 |

## Math

- GPT-5.3 Chat: 35.4 (#146)
- MiMo-V2.6-Pro: 37.9 (#91)

| Benchmark | GPT-5.3 Chat | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Math | 1389 | 1497 |

## Knowledge

- GPT-5.3 Chat: 38.2 (#137)
- MiMo-V2.6-Pro: 43.0 (#85)

| Benchmark | GPT-5.3 Chat | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Expert | 1397 | 1548 |

## Multimodal

- GPT-5.3 Chat: —
- MiMo-V2.6-Pro: 40.2 (#40)

| Benchmark | GPT-5.3 Chat | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Vision | — | 1265 |

## Multilingual

- GPT-5.3 Chat: 50.5 (#119)
- MiMo-V2.6-Pro: 57.0 (#15)

| Benchmark | GPT-5.3 Chat | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Non-English | 1383 | 1474 |
| LMArena Chinese | 1433 | 1532 |
| LMArena Russian | 1400 | 1481 |
| LMArena French | 1398 | — |
| LMArena German | 1384 | — |
| LMArena Japanese | 1351 | — |
| LMArena Korean | 1347 | — |
| LMArena Spanish | 1371 | — |

## Instruction Following

- GPT-5.3 Chat: 73.0 (#124)
- MiMo-V2.6-Pro: 78.2 (#10)

| Benchmark | GPT-5.3 Chat | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Instruction Following | 1378 | 1490 |

## Long Context

- GPT-5.3 Chat: 42.6 (#115)
- MiMo-V2.6-Pro: 46.0 (#26)

| Benchmark | GPT-5.3 Chat | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Longer Query | 1396 | 1500 |

## Writing & Preference

- GPT-5.3 Chat: 63.3 (#65)
- MiMo-V2.6-Pro: 66.9 (#32)

| Benchmark | GPT-5.3 Chat | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Text | 1389 | 1491 |
| LMArena Creative Writing | 1356 | 1465 |
| LMArena Multi-Turn | 1413 | 1463 |
| EQ-Bench Creative Writing | 1690 | — |

## FAQ

### Is GPT-5.3 Chat better than MiMo-V2.6-Pro?

MiMo-V2.6-Pro is the stronger model overall, scoring 46.7 to 42.1 on the Noometry Index.

### Which is cheaper, GPT-5.3 Chat or MiMo-V2.6-Pro?

MiMo-V2.6-Pro is cheaper. It lists at $0.43 per million input tokens and $0.87 per million output tokens; GPT-5.3 Chat lists at $1.75 and $14.

### Is GPT-5.3 Chat or MiMo-V2.6-Pro better for coding?

MiMo-V2.6-Pro scores higher on coding benchmarks: 53.2 versus 40.8 in the Noometry coding category.

### Which has the bigger context window?

MiMo-V2.6-Pro does, with 1.05M tokens against 128K.

### How many benchmarks do GPT-5.3 Chat and MiMo-V2.6-Pro share?

12 benchmarks have published results for both models. GPT-5.3 Chat has 18 scored results on Noometry and MiMo-V2.6-Pro has 14.