# GPT-5.3 Chat vs MiMo-V2.5

> GPT-5.3 Chat and MiMo-V2.5 score almost the same on the Noometry Index (42.8 vs 43.4), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/gpt-5-3-chat-vs-mimo-v2-5
- Last updated: 2026-10-11
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. GPT-5.3 Chat scores higher in 2 categories and MiMo-V2.5 in 6 categories; 7 gaps are clear of the uncertainty.
- MiMo-V2.5 is cheaper at $0.14 / $0.28 per million input/output tokens, against $1.75 / $14 for GPT-5.3 Chat.
- MiMo-V2.5 accepts more context: 1.05M tokens versus 128K.
- MiMo-V2.5 has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-5.3 Chat | MiMo-V2.5 |
|---|---|---|
| Provider | OpenAI | Xiaomi |
| Noometry Index | 42.8 | 43.4 |
| Rank | 109 | 93 |
| Context | 128K | 1.05M |
| Input $/M | $1.75 | $0.14 |
| Output $/M | $14 | $0.28 |
| Weights | Proprietary | Open |

## Coding

- GPT-5.3 Chat: 41.4 (#124)
- MiMo-V2.5: 43.9 (#81)

| Benchmark | GPT-5.3 Chat | MiMo-V2.5 |
|---|---|---|
| LMArena Coding | 1408 | 1469 |
| LMArena WebDev | — | 1438 |
| SciCode | — | 43.1% |
| ALE-Bench | — | 513.95 |

## Reasoning

- GPT-5.3 Chat: 28.5 (#102)
- MiMo-V2.5: 28.6 (#101)

| Benchmark | GPT-5.3 Chat | MiMo-V2.5 |
|---|---|---|
| LMArena Hard Prompts | 1399 | 1450 |
| CritPt | — | 3.7% |

## Math

- GPT-5.3 Chat: 38.2 (#142)
- MiMo-V2.5: 36.8 (#163)

| Benchmark | GPT-5.3 Chat | MiMo-V2.5 |
|---|---|---|
| LMArena Math | 1389 | 1436 |
| ProofBench | — | 16% |

## Knowledge

- GPT-5.3 Chat: 38.8 (#140)
- MiMo-V2.5: 40.8 (#115)

| Benchmark | GPT-5.3 Chat | MiMo-V2.5 |
|---|---|---|
| LMArena Expert | 1397 | 1460 |

## Multimodal

- GPT-5.3 Chat: —
- MiMo-V2.5: 39.8 (#54)

| Benchmark | GPT-5.3 Chat | MiMo-V2.5 |
|---|---|---|
| LMArena Vision | — | 1247 |

## Multilingual

- GPT-5.3 Chat: 50.3 (#124)
- MiMo-V2.5: 51.9 (#99)

| Benchmark | GPT-5.3 Chat | MiMo-V2.5 |
|---|---|---|
| LMArena Non-English | 1382 | 1404 |
| LMArena Chinese | 1432 | 1468 |
| LMArena French | 1397 | 1447 |
| LMArena German | 1384 | 1421 |
| LMArena Japanese | 1352 | 1306 |
| LMArena Korean | 1346 | 1363 |
| LMArena Russian | 1400 | 1395 |
| LMArena Spanish | 1371 | 1416 |

## Instruction Following

- GPT-5.3 Chat: 72.8 (#129)
- MiMo-V2.5: 75.5 (#60)

| Benchmark | GPT-5.3 Chat | MiMo-V2.5 |
|---|---|---|
| LMArena Instruction Following | 1378 | 1434 |

## Long Context

- GPT-5.3 Chat: 42.6 (#120)
- MiMo-V2.5: 44.2 (#73)

| Benchmark | GPT-5.3 Chat | MiMo-V2.5 |
|---|---|---|
| LMArena Longer Query | 1396 | 1445 |

## Writing & Preference

- GPT-5.3 Chat: 63.1 (#68)
- MiMo-V2.5: 61.6 (#86)

| Benchmark | GPT-5.3 Chat | MiMo-V2.5 |
|---|---|---|
| LMArena Text | 1389 | 1428 |
| LMArena Creative Writing | 1355 | 1393 |
| LMArena Multi-Turn | 1412 | 1445 |
| EQ-Bench Creative Writing | 1690 | — |

## FAQ

### Is GPT-5.3 Chat better than MiMo-V2.5?

GPT-5.3 Chat and MiMo-V2.5 score almost the same on the Noometry Index (42.8 vs 43.4), so choose on price, context window or the category you care about most.

### Which is cheaper, GPT-5.3 Chat or MiMo-V2.5?

MiMo-V2.5 is cheaper. It lists at $0.14 per million input tokens and $0.28 per million output tokens; GPT-5.3 Chat lists at $1.75 and $14.

### Is GPT-5.3 Chat or MiMo-V2.5 better for coding?

MiMo-V2.5 scores higher on coding benchmarks: 43.9 versus 41.4 in the Noometry coding category.

### Which has the bigger context window?

MiMo-V2.5 does, with 1.05M tokens against 128K.

### How many benchmarks do GPT-5.3 Chat and MiMo-V2.5 share?

17 benchmarks have published results for both models. GPT-5.3 Chat has 18 scored results on Noometry and MiMo-V2.5 has 23.