Model comparison
GPT-5.3 Chat vs MiMo-V2.6-Flash
MiMo-V2.6-Flash is the stronger model overall, scoring 44.4 to 42.1 on the Noometry Index.
Last verified . 12 shared benchmarks.
Summary
- They share 12 benchmarks with published results for both. GPT-5.3 Chat scores higher in 0 categories and MiMo-V2.6-Flash in 8 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in multilingual, where MiMo-V2.6-Flash leads 54.6 to 50.5.
- MiMo-V2.6-Flash is cheaper at $0.14 / $0.28 per million input/output tokens, against $1.75 / $14 for GPT-5.3 Chat.
- MiMo-V2.6-Flash accepts more context: 1.05M tokens versus 128K.
- MiMo-V2.6-Flash has downloadable open weights; the other is API-only.
Side by side
| GPT-5.3 Chat | MiMo-V2.6-Flash | |
|---|---|---|
| Provider | OpenAI | Xiaomi |
| Noometry Index | 42.1 | 44.4 |
| Released | 2026-03-03 | 2026-09-22 |
| Weights | Proprietary | Open |
| Context window | 128K | 1.05M |
| Max output | 16K | 131K |
| Input $ / M tokens | $1.75 | $0.14 |
| Output $ / M tokens | $14 | $0.28 |
| Results tracked | 18 | 13 |
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Category by category
Coding MiMo-V2.6-Flash leads
GPT-5.3 Chat: 40.8 (#124), MiMo-V2.6-Flash: 44.3 (#68)
| Benchmark | GPT-5.3 Chat | MiMo-V2.6-Flash |
|---|---|---|
| LMArena Coding | 1408 | 1516 |
Reasoning MiMo-V2.6-Flash leads
GPT-5.3 Chat: 27.3 (#105), MiMo-V2.6-Flash: 29.6 (#82)
| Benchmark | GPT-5.3 Chat | MiMo-V2.6-Flash |
|---|---|---|
| LMArena Hard Prompts | 1399 | 1481 |
Math MiMo-V2.6-Flash leads
GPT-5.3 Chat: 35.4 (#146), MiMo-V2.6-Flash: 37.4 (#97)
| Benchmark | GPT-5.3 Chat | MiMo-V2.6-Flash |
|---|---|---|
| LMArena Math | 1389 | 1477 |
Knowledge MiMo-V2.6-Flash leads
GPT-5.3 Chat: 38.2 (#137), MiMo-V2.6-Flash: 42.0 (#91)
| Benchmark | GPT-5.3 Chat | MiMo-V2.6-Flash |
|---|---|---|
| LMArena Expert | 1397 | 1516 |
Multimodal Not comparable
GPT-5.3 Chat: —, MiMo-V2.6-Flash: 40.2 (#39)
| Benchmark | GPT-5.3 Chat | MiMo-V2.6-Flash |
|---|---|---|
| LMArena Vision | — | 1266 |
Multilingual MiMo-V2.6-Flash leads
GPT-5.3 Chat: 50.5 (#119), MiMo-V2.6-Flash: 54.6 (#41)
| Benchmark | GPT-5.3 Chat | MiMo-V2.6-Flash |
|---|---|---|
| LMArena Non-English | 1383 | 1439 |
| LMArena Chinese | 1433 | 1501 |
| LMArena Russian | 1400 | 1424 |
| LMArena French | 1398 | — |
| LMArena German | 1384 | — |
| LMArena Japanese | 1351 | — |
| LMArena Korean | 1347 | — |
| LMArena Spanish | 1371 | — |
Instruction Following MiMo-V2.6-Flash leads
GPT-5.3 Chat: 73.0 (#124), MiMo-V2.6-Flash: 77.0 (#33)
| Benchmark | GPT-5.3 Chat | MiMo-V2.6-Flash |
|---|---|---|
| LMArena Instruction Following | 1378 | 1463 |
Long Context MiMo-V2.6-Flash leads
GPT-5.3 Chat: 42.6 (#115), MiMo-V2.6-Flash: 44.8 (#52)
| Benchmark | GPT-5.3 Chat | MiMo-V2.6-Flash |
|---|---|---|
| LMArena Longer Query | 1396 | 1465 |
Writing & Preference Too close to call
GPT-5.3 Chat: 63.3 (#65), MiMo-V2.6-Flash: 63.9 (#61)
| Benchmark | GPT-5.3 Chat | MiMo-V2.6-Flash |
|---|---|---|
| LMArena Text | 1389 | 1459 |
| LMArena Creative Writing | 1356 | 1408 |
| LMArena Multi-Turn | 1413 | 1460 |
| EQ-Bench Creative Writing | 1690 | — |
Frequently asked questions
Is GPT-5.3 Chat better than MiMo-V2.6-Flash?
MiMo-V2.6-Flash is the stronger model overall, scoring 44.4 to 42.1 on the Noometry Index.
Which is cheaper, GPT-5.3 Chat or MiMo-V2.6-Flash?
MiMo-V2.6-Flash 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-V2.6-Flash better for coding?
MiMo-V2.6-Flash scores higher on coding benchmarks: 44.3 versus 40.8 in the Noometry coding category.
Which has the bigger context window?
MiMo-V2.6-Flash does, with 1.05M tokens against 128K.
How many benchmarks do GPT-5.3 Chat and MiMo-V2.6-Flash share?
12 benchmarks have published results for both models. GPT-5.3 Chat has 18 scored results on Noometry and MiMo-V2.6-Flash has 13.