Model comparison
GPT-5.3 Chat vs MiMo-V2.5-Pro
MiMo-V2.5-Pro is the stronger model overall, scoring 45.2 to 42.8 on the Noometry Index.
Last verified . 18 shared benchmarks.
Summary
- They share 18 benchmarks with published results for both. GPT-5.3 Chat scores higher in 1 category and MiMo-V2.5-Pro in 7 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in coding, where MiMo-V2.5-Pro leads 47.4 to 41.4.
- MiMo-V2.5-Pro is cheaper at $0.43 / $0.87 per million input/output tokens, against $1.75 / $14 for GPT-5.3 Chat.
- MiMo-V2.5-Pro accepts more context: 1.05M tokens versus 128K.
- MiMo-V2.5-Pro has downloadable open weights; the other is API-only.
Side by side
| GPT-5.3 Chat | MiMo-V2.5-Pro | |
|---|---|---|
| Provider | OpenAI | Xiaomi |
| Noometry Index | 42.8 | 45.2 |
| Released | 2026-03-03 | 2026-04-22 |
| Weights | Proprietary | Open |
| Context window | 128K | 1.05M |
| Max output | 16K | 131K |
| Input $ / M tokens | $1.75 | $0.43 |
| Output $ / M tokens | $14 | $0.87 |
| Results tracked | 18 | 27 |
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Category by category
Coding MiMo-V2.5-Pro leads
GPT-5.3 Chat: 41.4 (#124), MiMo-V2.5-Pro: 47.4 (#60)
| Benchmark | GPT-5.3 Chat | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Coding | 1408 | 1503 |
| LMArena WebDev | — | 1479 |
| SciCode | — | 50.2% |
| ALE-Bench | — | 899.8 |
Reasoning GPT-5.3 Chat leads
GPT-5.3 Chat: 28.5 (#102), MiMo-V2.5-Pro: 26.8 (#130)
| Benchmark | GPT-5.3 Chat | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Hard Prompts | 1399 | 1488 |
| NYT Connections (extended) | — | 34.4% |
| CritPt | — | 4% |
| DTBench | — | 84.5% |
| LMCA | — | 29.5% |
Math MiMo-V2.5-Pro leads
GPT-5.3 Chat: 38.2 (#142), MiMo-V2.5-Pro: 40.0 (#96)
| Benchmark | GPT-5.3 Chat | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Math | 1389 | 1481 |
| ProofBench | — | 22% |
Knowledge MiMo-V2.5-Pro leads
GPT-5.3 Chat: 38.8 (#140), MiMo-V2.5-Pro: 42.2 (#98)
| Benchmark | GPT-5.3 Chat | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Expert | 1397 | 1503 |
Multilingual MiMo-V2.5-Pro leads
GPT-5.3 Chat: 50.3 (#124), MiMo-V2.5-Pro: 55.1 (#34)
| Benchmark | GPT-5.3 Chat | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Non-English | 1382 | 1449 |
| LMArena Chinese | 1432 | 1507 |
| LMArena French | 1397 | 1488 |
| LMArena German | 1384 | 1458 |
| LMArena Japanese | 1352 | 1412 |
| LMArena Korean | 1346 | 1437 |
| LMArena Russian | 1400 | 1450 |
| LMArena Spanish | 1371 | 1471 |
Instruction Following MiMo-V2.5-Pro leads
GPT-5.3 Chat: 72.8 (#129), MiMo-V2.5-Pro: 77.5 (#21)
| Benchmark | GPT-5.3 Chat | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Instruction Following | 1378 | 1477 |
Long Context MiMo-V2.5-Pro leads
GPT-5.3 Chat: 42.6 (#120), MiMo-V2.5-Pro: 45.4 (#37)
| Benchmark | GPT-5.3 Chat | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Longer Query | 1396 | 1483 |
Writing & Preference MiMo-V2.5-Pro leads
GPT-5.3 Chat: 63.1 (#68), MiMo-V2.5-Pro: 65.3 (#49)
| Benchmark | GPT-5.3 Chat | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Text | 1389 | 1465 |
| LMArena Creative Writing | 1355 | 1440 |
| EQ-Bench Creative Writing | 1690 | 1493 |
| LMArena Multi-Turn | 1412 | 1477 |
| EQ-Bench 4 | — | 1208 |
Frequently asked questions
Is GPT-5.3 Chat better than MiMo-V2.5-Pro?
MiMo-V2.5-Pro is the stronger model overall, scoring 45.2 to 42.8 on the Noometry Index.
Which is cheaper, GPT-5.3 Chat or MiMo-V2.5-Pro?
MiMo-V2.5-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-V2.5-Pro better for coding?
MiMo-V2.5-Pro scores higher on coding benchmarks: 47.4 versus 41.4 in the Noometry coding category.
Which has the bigger context window?
MiMo-V2.5-Pro does, with 1.05M tokens against 128K.
How many benchmarks do GPT-5.3 Chat and MiMo-V2.5-Pro share?
18 benchmarks have published results for both models. GPT-5.3 Chat has 18 scored results on Noometry and MiMo-V2.5-Pro has 27.