Model comparison
Claude Sonnet 5.5 vs MiMo-V2-Flash
Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 41.3 on the Noometry Index. MiMo-V2-Flash costs 23× less per token, which makes it the better buy when Claude Sonnet 5.5's lead doesn't matter for your workload.
Last verified . 16 shared benchmarks.
Summary
- They share 16 benchmarks with published results for both. Claude Sonnet 5.5 scores higher in 8 categories and MiMo-V2-Flash in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Sonnet 5.5 leads 87.9 to 38.3.
- The biggest single-benchmark swing is SciCode: 61% for Claude Sonnet 5.5 and 25.9% for MiMo-V2-Flash.
- MiMo-V2-Flash is cheaper at $0.14 / $0.28 per million input/output tokens, against $2 / $10 for Claude Sonnet 5.5.
- Claude Sonnet 5.5 accepts more context: 1M tokens versus 262K.
- MiMo-V2-Flash has downloadable open weights; the other is API-only.
Side by side
| Claude Sonnet 5.5 | MiMo-V2-Flash | |
|---|---|---|
| Provider | Anthropic | Xiaomi |
| Noometry Index | 61.9 | 41.3 |
| Released | 2026-09-28 | 2025-12-16 |
| Weights | Proprietary | Open |
| Context window | 1M | 262K |
| Max output | 128K | 66K |
| Input $ / M tokens | $2 | $0.14 |
| Output $ / M tokens | $10 | $0.28 |
| Results tracked | 32 | 21 |
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Category by category
Coding Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 67.3 (#6), MiMo-V2-Flash: 36.1 (#211)
| Benchmark | Claude Sonnet 5.5 | MiMo-V2-Flash |
|---|---|---|
| LMArena WebDev | 1774 | 1330 |
| SciCode | 61% | 25.9% |
| LMArena Coding | 1513 | 1443 |
| ALE-Bench | 1,819 | 737.95 |
| FrontierCode | 52.1% | — |
| CursorBench | 55.5% | — |
| FrontierSWE | 61.9% | — |
Agentic & Tool Use Not comparable
Claude Sonnet 5.5: 45.0 (#16), MiMo-V2-Flash: —
| Benchmark | Claude Sonnet 5.5 | MiMo-V2-Flash |
|---|---|---|
| APEX-Agents | 75.5% | — |
Reasoning Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 54.0 (#28), MiMo-V2-Flash: 24.9 (#157)
| Benchmark | Claude Sonnet 5.5 | MiMo-V2-Flash |
|---|---|---|
| CritPt | 31.4% | 0% |
| LMArena Hard Prompts | 1495 | 1420 |
| NYT Connections (extended) | 80.5% | — |
| Mystery Game Puzzles | 65% | — |
| Epoch Capabilities Index | 165.03 | — |
Math Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 87.9 (#6), MiMo-V2-Flash: 38.3 (#139)
| Benchmark | Claude Sonnet 5.5 | MiMo-V2-Flash |
|---|---|---|
| LMArena Math | 1510 | 1396 |
| FrontierMath (Tiers 1-3) | 88.8% | — |
| FrontierMath Tier 4 | 80.5% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| ProofBench | 100% | — |
| FrontierMath Erdős | 2.9% | — |
Knowledge Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 66.0 (#12), MiMo-V2-Flash: 39.7 (#131)
| Benchmark | Claude Sonnet 5.5 | MiMo-V2-Flash |
|---|---|---|
| LMArena Expert | 1540 | 1425 |
| GPQA Diamond | 95.6% | — |
| SimpleQA Verified | 46.5% | — |
Multimodal Not comparable
Claude Sonnet 5.5: 51.5 (#6), MiMo-V2-Flash: —
| Benchmark | Claude Sonnet 5.5 | MiMo-V2-Flash |
|---|---|---|
| LMArena Vision | 1289 | — |
| Furniture Assembly | 75% | — |
Multilingual Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 55.3 (#30), MiMo-V2-Flash: 51.0 (#113)
| Benchmark | Claude Sonnet 5.5 | MiMo-V2-Flash |
|---|---|---|
| LMArena Non-English | 1452 | 1392 |
| LMArena Chinese | 1522 | 1462 |
| LMArena Russian | 1451 | 1387 |
| LMArena French | — | 1429 |
| LMArena German | — | 1395 |
| LMArena Japanese | — | 1325 |
| LMArena Korean | — | 1358 |
| LMArena Spanish | — | 1420 |
Instruction Following Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 78.3 (#11), MiMo-V2-Flash: 73.5 (#120)
| Benchmark | Claude Sonnet 5.5 | MiMo-V2-Flash |
|---|---|---|
| LMArena Instruction Following | 1495 | 1392 |
Long Context Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 45.9 (#28), MiMo-V2-Flash: 43.0 (#110)
| Benchmark | Claude Sonnet 5.5 | MiMo-V2-Flash |
|---|---|---|
| LMArena Longer Query | 1498 | 1409 |
Writing & Preference Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 66.0 (#40), MiMo-V2-Flash: 59.7 (#106)
| Benchmark | Claude Sonnet 5.5 | MiMo-V2-Flash |
|---|---|---|
| LMArena Text | 1471 | 1411 |
| LMArena Creative Writing | 1465 | 1375 |
| LMArena Multi-Turn | 1474 | 1404 |
Frequently asked questions
Is Claude Sonnet 5.5 better than MiMo-V2-Flash?
Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 41.3 on the Noometry Index. MiMo-V2-Flash costs 23× less per token, which makes it the better buy when Claude Sonnet 5.5's lead doesn't matter for your workload.
Which is cheaper, Claude Sonnet 5.5 or MiMo-V2-Flash?
MiMo-V2-Flash is cheaper. It lists at $0.14 per million input tokens and $0.28 per million output tokens; Claude Sonnet 5.5 lists at $2 and $10.
Is Claude Sonnet 5.5 or MiMo-V2-Flash better for coding?
Claude Sonnet 5.5 scores higher on coding benchmarks: 67.3 versus 36.1 in the Noometry coding category.
Which has the bigger context window?
Claude Sonnet 5.5 does, with 1M tokens against 262K.
How many benchmarks do Claude Sonnet 5.5 and MiMo-V2-Flash share?
16 benchmarks have published results for both models. Claude Sonnet 5.5 has 32 scored results on Noometry and MiMo-V2-Flash has 21.