Model comparison
GPT-5.5 Instant vs MiMo-V2-Flash
GPT-5.5 Instant is the stronger model overall, scoring 42.5 to 40.8 on the Noometry Index.
Last verified . 19 shared benchmarks.
Summary
- They share 19 benchmarks with published results for both. GPT-5.5 Instant scores higher in 7 categories and MiMo-V2-Flash in 1 category; 5 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where GPT-5.5 Instant leads 48.9 to 39.1.
- The biggest single-benchmark swing is SciCode: 48.6% for GPT-5.5 Instant and 25.9% for MiMo-V2-Flash.
- MiMo-V2-Flash has downloadable open weights; the other is API-only.
Side by side
| GPT-5.5 Instant | MiMo-V2-Flash | |
|---|---|---|
| Provider | OpenAI | Xiaomi |
| Noometry Index | 42.5 | 40.8 |
| Released | 2026-05-05 | 2025-12-16 |
| Weights | Proprietary | Open |
| Context window | — | 262K |
| Max output | — | 66K |
| Input $ / M tokens | — | $0.14 |
| Output $ / M tokens | — | $0.28 |
| Results tracked | 27 | 21 |
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Category by category
Coding GPT-5.5 Instant leads
GPT-5.5 Instant: 43.7 (#73), MiMo-V2-Flash: 35.8 (#205)
| Benchmark | GPT-5.5 Instant | MiMo-V2-Flash |
|---|---|---|
| SciCode | 48.6% | 25.9% |
| LMArena Coding | 1433 | 1443 |
| LMArena WebDev | — | 1330 |
| ALE-Bench | — | 737.95 |
Reasoning Too close to call
GPT-5.5 Instant: 24.2 (#149), MiMo-V2-Flash: 24.1 (#155)
| Benchmark | GPT-5.5 Instant | MiMo-V2-Flash |
|---|---|---|
| CritPt | 0% | 0% |
| LMArena Hard Prompts | 1426 | 1420 |
| Chess Puzzles | 12% | — |
| Epoch Capabilities Index | 142.48 | — |
Math MiMo-V2-Flash leads
GPT-5.5 Instant: 26.1 (#241), MiMo-V2-Flash: 35.6 (#141)
| Benchmark | GPT-5.5 Instant | MiMo-V2-Flash |
|---|---|---|
| LMArena Math | 1420 | 1396 |
| FrontierMath (Tiers 1-3) | 26.3% | — |
| FrontierMath Tier 4 | 2.4% | — |
| OTIS Mock AIME 2024-2025 | 68.1% | — |
Knowledge GPT-5.5 Instant leads
GPT-5.5 Instant: 48.9 (#68), MiMo-V2-Flash: 39.1 (#126)
| Benchmark | GPT-5.5 Instant | MiMo-V2-Flash |
|---|---|---|
| LMArena Expert | 1409 | 1425 |
| GPQA Diamond | 82.5% | — |
Multimodal Not comparable
GPT-5.5 Instant: 39.3 (#48), MiMo-V2-Flash: —
| Benchmark | GPT-5.5 Instant | MiMo-V2-Flash |
|---|---|---|
| LMArena Vision | 1250 | — |
| LMArena Document | 1403 | — |
Multilingual GPT-5.5 Instant leads
GPT-5.5 Instant: 53.0 (#76), MiMo-V2-Flash: 51.1 (#109)
| Benchmark | GPT-5.5 Instant | MiMo-V2-Flash |
|---|---|---|
| LMArena Non-English | 1417 | 1391 |
| LMArena Chinese | 1457 | 1463 |
| LMArena French | 1428 | 1429 |
| LMArena German | 1410 | 1395 |
| LMArena Japanese | 1408 | 1324 |
| LMArena Korean | 1393 | 1358 |
| LMArena Russian | 1430 | 1387 |
| LMArena Spanish | 1430 | 1420 |
Instruction Following Too close to call
GPT-5.5 Instant: 74.4 (#94), MiMo-V2-Flash: 73.7 (#115)
| Benchmark | GPT-5.5 Instant | MiMo-V2-Flash |
|---|---|---|
| LMArena Instruction Following | 1407 | 1392 |
Long Context Too close to call
GPT-5.5 Instant: 43.4 (#92), MiMo-V2-Flash: 43.0 (#106)
| Benchmark | GPT-5.5 Instant | MiMo-V2-Flash |
|---|---|---|
| LMArena Longer Query | 1422 | 1409 |
Writing & Preference GPT-5.5 Instant leads
GPT-5.5 Instant: 62.0 (#81), MiMo-V2-Flash: 59.9 (#101)
| Benchmark | GPT-5.5 Instant | MiMo-V2-Flash |
|---|---|---|
| LMArena Text | 1419 | 1411 |
| LMArena Creative Writing | 1420 | 1375 |
| LMArena Multi-Turn | 1434 | 1404 |
Frequently asked questions
Is GPT-5.5 Instant better than MiMo-V2-Flash?
GPT-5.5 Instant is the stronger model overall, scoring 42.5 to 40.8 on the Noometry Index.
Is GPT-5.5 Instant or MiMo-V2-Flash better for coding?
GPT-5.5 Instant scores higher on coding benchmarks: 43.7 versus 35.8 in the Noometry coding category.
How many benchmarks do GPT-5.5 Instant and MiMo-V2-Flash share?
19 benchmarks have published results for both models. GPT-5.5 Instant has 27 scored results on Noometry and MiMo-V2-Flash has 21.