Model comparison
GPT-5.3 Chat vs MiMo-V2.6-Flash
MiMo-V2.6-Flash is the stronger model overall, scoring 48.5 to 42.8 on the Noometry Index.
Last verified . 14 shared benchmarks.
Summary
- They share 14 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 math, where MiMo-V2.6-Flash leads 51.9 to 38.2.
- 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 | 42.8 | 48.5 |
| Released | 2026-03-03 | 2026-09-21 |
| 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 | 19 |
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Category by category
Coding MiMo-V2.6-Flash leads
GPT-5.3 Chat: 41.4 (#124), MiMo-V2.6-Flash: 53.4 (#30)
| Benchmark | GPT-5.3 Chat | MiMo-V2.6-Flash |
|---|---|---|
| LMArena Coding | 1408 | 1504 |
| LMArena WebDev | — | 1637 |
| SciCode | — | 51.3% |
Reasoning MiMo-V2.6-Flash leads
GPT-5.3 Chat: 28.5 (#102), MiMo-V2.6-Flash: 36.5 (#66)
| Benchmark | GPT-5.3 Chat | MiMo-V2.6-Flash |
|---|---|---|
| LMArena Hard Prompts | 1399 | 1482 |
| CritPt | — | 12% |
Math MiMo-V2.6-Flash leads
GPT-5.3 Chat: 38.2 (#142), MiMo-V2.6-Flash: 51.9 (#52)
| Benchmark | GPT-5.3 Chat | MiMo-V2.6-Flash |
|---|---|---|
| LMArena Math | 1389 | 1468 |
| ProofBench | — | 63% |
Knowledge MiMo-V2.6-Flash leads
GPT-5.3 Chat: 38.8 (#140), MiMo-V2.6-Flash: 42.2 (#99)
| Benchmark | GPT-5.3 Chat | MiMo-V2.6-Flash |
|---|---|---|
| LMArena Expert | 1397 | 1501 |
Multimodal Not comparable
GPT-5.3 Chat: —, MiMo-V2.6-Flash: 40.5 (#47)
| Benchmark | GPT-5.3 Chat | MiMo-V2.6-Flash |
|---|---|---|
| LMArena Vision | — | 1259 |
Multilingual MiMo-V2.6-Flash leads
GPT-5.3 Chat: 50.3 (#124), MiMo-V2.6-Flash: 54.0 (#51)
| Benchmark | GPT-5.3 Chat | MiMo-V2.6-Flash |
|---|---|---|
| LMArena Non-English | 1382 | 1434 |
| LMArena Chinese | 1432 | 1511 |
| LMArena French | 1397 | 1475 |
| LMArena Russian | 1400 | 1409 |
| LMArena Spanish | 1371 | 1456 |
| LMArena German | 1384 | — |
| LMArena Japanese | 1352 | — |
| LMArena Korean | 1346 | — |
Instruction Following MiMo-V2.6-Flash leads
GPT-5.3 Chat: 72.8 (#129), MiMo-V2.6-Flash: 76.8 (#35)
| 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 (#120), MiMo-V2.6-Flash: 44.8 (#57)
| Benchmark | GPT-5.3 Chat | MiMo-V2.6-Flash |
|---|---|---|
| LMArena Longer Query | 1396 | 1463 |
Writing & Preference Too close to call
GPT-5.3 Chat: 63.1 (#68), MiMo-V2.6-Flash: 63.1 (#67)
| Benchmark | GPT-5.3 Chat | MiMo-V2.6-Flash |
|---|---|---|
| LMArena Text | 1389 | 1455 |
| LMArena Creative Writing | 1355 | 1400 |
| LMArena Multi-Turn | 1412 | 1451 |
| 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 48.5 to 42.8 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: 53.4 versus 41.4 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?
14 benchmarks have published results for both models. GPT-5.3 Chat has 18 scored results on Noometry and MiMo-V2.6-Flash has 19.