Model comparison
GPT-5.5 Instant vs MiMo-V2.6-Pro
MiMo-V2.6-Pro is the stronger model overall, scoring 46.7 to 42.5 on the Noometry Index.
Last verified . 13 shared benchmarks.
Summary
- They share 13 benchmarks with published results for both. GPT-5.5 Instant scores higher in 1 category and MiMo-V2.6-Pro in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where MiMo-V2.6-Pro leads 37.9 to 26.1.
- MiMo-V2.6-Pro has downloadable open weights; the other is API-only.
Side by side
| GPT-5.5 Instant | MiMo-V2.6-Pro | |
|---|---|---|
| Provider | OpenAI | Xiaomi |
| Noometry Index | 42.5 | 46.7 |
| Released | 2026-05-05 | 2026-09-22 |
| Weights | Proprietary | Open |
| Context window | — | 1.05M |
| Max output | — | 131K |
| Input $ / M tokens | — | $0.43 |
| Output $ / M tokens | — | $0.87 |
| Results tracked | 27 | 14 |
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Category by category
Coding MiMo-V2.6-Pro leads
GPT-5.5 Instant: 43.7 (#73), MiMo-V2.6-Pro: 53.2 (#27)
| Benchmark | GPT-5.5 Instant | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Coding | 1433 | 1538 |
| LMArena WebDev | — | 1618 |
| SciCode | 48.6% | — |
Reasoning MiMo-V2.6-Pro leads
GPT-5.5 Instant: 24.2 (#149), MiMo-V2.6-Pro: 30.4 (#76)
| Benchmark | GPT-5.5 Instant | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Hard Prompts | 1426 | 1511 |
| CritPt | 0% | — |
| Chess Puzzles | 12% | — |
| Epoch Capabilities Index | 142.48 | — |
Math MiMo-V2.6-Pro leads
GPT-5.5 Instant: 26.1 (#241), MiMo-V2.6-Pro: 37.9 (#91)
| Benchmark | GPT-5.5 Instant | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Math | 1420 | 1497 |
| 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-V2.6-Pro: 43.0 (#85)
| Benchmark | GPT-5.5 Instant | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Expert | 1409 | 1548 |
| GPQA Diamond | 82.5% | — |
Multimodal Too close to call
GPT-5.5 Instant: 39.3 (#48), MiMo-V2.6-Pro: 40.2 (#40)
| Benchmark | GPT-5.5 Instant | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Vision | 1250 | 1265 |
| LMArena Document | 1403 | — |
Multilingual MiMo-V2.6-Pro leads
GPT-5.5 Instant: 53.0 (#76), MiMo-V2.6-Pro: 57.0 (#15)
| Benchmark | GPT-5.5 Instant | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Non-English | 1417 | 1474 |
| LMArena Chinese | 1457 | 1532 |
| LMArena Russian | 1430 | 1481 |
| LMArena French | 1428 | — |
| LMArena German | 1410 | — |
| LMArena Japanese | 1408 | — |
| LMArena Korean | 1393 | — |
| LMArena Spanish | 1430 | — |
Instruction Following MiMo-V2.6-Pro leads
GPT-5.5 Instant: 74.4 (#94), MiMo-V2.6-Pro: 78.2 (#10)
| Benchmark | GPT-5.5 Instant | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Instruction Following | 1407 | 1490 |
Long Context MiMo-V2.6-Pro leads
GPT-5.5 Instant: 43.4 (#92), MiMo-V2.6-Pro: 46.0 (#26)
| Benchmark | GPT-5.5 Instant | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Longer Query | 1422 | 1500 |
Writing & Preference MiMo-V2.6-Pro leads
GPT-5.5 Instant: 62.0 (#81), MiMo-V2.6-Pro: 66.9 (#32)
| Benchmark | GPT-5.5 Instant | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Text | 1419 | 1491 |
| LMArena Creative Writing | 1420 | 1465 |
| LMArena Multi-Turn | 1434 | 1463 |
Frequently asked questions
Is GPT-5.5 Instant better than MiMo-V2.6-Pro?
MiMo-V2.6-Pro is the stronger model overall, scoring 46.7 to 42.5 on the Noometry Index.
Is GPT-5.5 Instant or MiMo-V2.6-Pro better for coding?
MiMo-V2.6-Pro scores higher on coding benchmarks: 53.2 versus 43.7 in the Noometry coding category.
How many benchmarks do GPT-5.5 Instant and MiMo-V2.6-Pro share?
13 benchmarks have published results for both models. GPT-5.5 Instant has 27 scored results on Noometry and MiMo-V2.6-Pro has 14.