Model comparison
Claude Sonnet 4.5 vs MiMo-V2.6-Flash
Claude Sonnet 4.5 and MiMo-V2.6-Flash score almost the same on the Noometry Index (44.0 vs 44.4), so choose on price, context window or the category you care about most.
Last verified . 12 shared benchmarks.
Summary
- They share 12 benchmarks with published results for both. Claude Sonnet 4.5 scores higher in 4 categories and MiMo-V2.6-Flash in 5 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Claude Sonnet 4.5 leads 48.4 to 42.0.
- MiMo-V2.6-Flash is cheaper at $0.14 / $0.28 per million input/output tokens, against $3 / $15 for Claude Sonnet 4.5.
- MiMo-V2.6-Flash accepts more context: 1.05M tokens versus 1M.
- MiMo-V2.6-Flash has downloadable open weights; the other is API-only.
Side by side
| Claude Sonnet 4.5 | MiMo-V2.6-Flash | |
|---|---|---|
| Provider | Anthropic | Xiaomi |
| Noometry Index | 44.0 | 44.4 |
| Released | 2025-09-29 | 2026-09-22 |
| Weights | Proprietary | Open |
| Context window | 1M | 1.05M |
| Max output | 64K | 131K |
| Input $ / M tokens | $3 | $0.14 |
| Output $ / M tokens | $15 | $0.28 |
| Results tracked | 73 | 13 |
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Category by category
Coding Claude Sonnet 4.5 leads
Claude Sonnet 4.5: 47.8 (#54), MiMo-V2.6-Flash: 44.3 (#68)
| Benchmark | Claude Sonnet 4.5 | MiMo-V2.6-Flash |
|---|---|---|
| LMArena Coding | 1489 | 1516 |
| SWE-bench Verified | 71.3% | — |
| SWE-bench Verified (bash only) | 71.4% | — |
| LMArena WebDev | 1393 | — |
| SWE-bench Multilingual | 67% | — |
| SciCode | 44.7% | — |
| GSO | 14.7% | — |
| WeirdML | 47.7% | — |
| ALE-Bench | 796.15 | — |
| AlgoTune | 1.52 | — |
Agentic & Tool Use Not comparable
Claude Sonnet 4.5: 38.1 (#30), MiMo-V2.6-Flash: —
| Benchmark | Claude Sonnet 4.5 | MiMo-V2.6-Flash |
|---|---|---|
| Terminal-Bench | 46.5% | — |
| Berkeley Function Calling Leaderboard | 73.2% | — |
| GDPval | 42.5% | — |
| Remote Labor Index | 2.1% | — |
| τ²-bench Airline | 72% | — |
| τ²-bench Banking | 25.3% | — |
| τ²-bench Retail | 72.4% | — |
| τ²-bench Telecom | 84.9% | — |
| Cybench | 60% | — |
| DeepResearch Bench | 52.6% | — |
| OSWorld | 62.9% | — |
| LMArena Search | 1159 | — |
| METR Time Horizons | 67.4% | — |
| Vending-Bench 2 | 3,839 | — |
Reasoning MiMo-V2.6-Flash leads
Claude Sonnet 4.5: 26.9 (#113), MiMo-V2.6-Flash: 29.6 (#82)
| Benchmark | Claude Sonnet 4.5 | MiMo-V2.6-Flash |
|---|---|---|
| LMArena Hard Prompts | 1462 | 1481 |
| ARC-AGI-2 | 13.6% | — |
| SimpleBench | 54.3% | — |
| Kagi LLM Benchmark | 57.9% | — |
| NYT Connections (extended) | 37.3% | — |
| ARC-AGI-1 | 63.7% | — |
| CritPt | 1.1% | — |
| Chess Puzzles | 12% | — |
| EnigmaEval | 6% | — |
| EBR-Bench | 2.4% | — |
| Mystery Game Puzzles | 17% | — |
| DTBench | 83.2% | — |
| LMCA | 38.8% | — |
| Epoch Capabilities Index | 146.84 | — |
| ForecastBench | 61.9 | — |
Math MiMo-V2.6-Flash leads
Claude Sonnet 4.5: 31.9 (#190), MiMo-V2.6-Flash: 37.4 (#97)
| Benchmark | Claude Sonnet 4.5 | MiMo-V2.6-Flash |
|---|---|---|
| LMArena Math | 1448 | 1477 |
| FrontierMath (Tiers 1-3) | 23.9% | — |
| FrontierMath Tier 4 | 2.4% | — |
| OTIS Mock AIME 2024-2025 | 77.8% | — |
| ProofBench | 19% | — |
| Omni-MATH | 55.3% | — |
| MATH Level 5 | 97.7% | — |
| FrontierMath (Feb 2025 set) | 15.2% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |
Knowledge Claude Sonnet 4.5 leads
Claude Sonnet 4.5: 48.4 (#70), MiMo-V2.6-Flash: 42.0 (#91)
| Benchmark | Claude Sonnet 4.5 | MiMo-V2.6-Flash |
|---|---|---|
| LMArena Expert | 1483 | 1516 |
| GPQA Diamond | 82.3% | — |
| Humanity's Last Exam | 13.7% | — |
| SimpleQA Verified | 30.7% | — |
| MMLU-Pro | 86.9% | — |
| Vectara Hallucination Rate | 12% | — |
| GPQA (HELM) | 68.6% | — |
Multimodal MiMo-V2.6-Flash leads
Claude Sonnet 4.5: 34.1 (#84), MiMo-V2.6-Flash: 40.2 (#39)
| Benchmark | Claude Sonnet 4.5 | MiMo-V2.6-Flash |
|---|---|---|
| LMArena Vision | — | 1266 |
| VPCT | 39.8% | — |
| LMArena Document | 1450 | — |
Multilingual MiMo-V2.6-Flash leads
Claude Sonnet 4.5: 53.6 (#65), MiMo-V2.6-Flash: 54.6 (#41)
| Benchmark | Claude Sonnet 4.5 | MiMo-V2.6-Flash |
|---|---|---|
| LMArena Non-English | 1425 | 1439 |
| LMArena Chinese | 1459 | 1501 |
| LMArena Russian | 1436 | 1424 |
| LMArena French | 1459 | — |
| LMArena German | 1427 | — |
| LMArena Japanese | 1390 | — |
| LMArena Korean | 1403 | — |
| LMArena Spanish | 1457 | — |
Instruction Following MiMo-V2.6-Flash leads
Claude Sonnet 4.5: 75.2 (#74), MiMo-V2.6-Flash: 77.0 (#33)
| Benchmark | Claude Sonnet 4.5 | MiMo-V2.6-Flash |
|---|---|---|
| LMArena Instruction Following | 1459 | 1463 |
| IFEval | 85% | — |
Long Context Too close to call
Claude Sonnet 4.5: 45.2 (#45), MiMo-V2.6-Flash: 44.8 (#52)
| Benchmark | Claude Sonnet 4.5 | MiMo-V2.6-Flash |
|---|---|---|
| LMArena Longer Query | 1476 | 1465 |
Writing & Preference Claude Sonnet 4.5 leads
Claude Sonnet 4.5: 66.7 (#33), MiMo-V2.6-Flash: 63.9 (#61)
| Benchmark | Claude Sonnet 4.5 | MiMo-V2.6-Flash |
|---|---|---|
| LMArena Text | 1439 | 1459 |
| LMArena Creative Writing | 1442 | 1408 |
| LMArena Multi-Turn | 1465 | 1460 |
| EQ-Bench Creative Writing | 1678 | — |
| WildBench | 85.4% | — |
Frequently asked questions
Is Claude Sonnet 4.5 better than MiMo-V2.6-Flash?
Claude Sonnet 4.5 and MiMo-V2.6-Flash score almost the same on the Noometry Index (44.0 vs 44.4), so choose on price, context window or the category you care about most.
Which is cheaper, Claude Sonnet 4.5 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; Claude Sonnet 4.5 lists at $3 and $15.
Is Claude Sonnet 4.5 or MiMo-V2.6-Flash better for coding?
Claude Sonnet 4.5 scores higher on coding benchmarks: 47.8 versus 44.3 in the Noometry coding category.
Which has the bigger context window?
MiMo-V2.6-Flash does, with 1.05M tokens against 1M.
How many benchmarks do Claude Sonnet 4.5 and MiMo-V2.6-Flash share?
12 benchmarks have published results for both models. Claude Sonnet 4.5 has 73 scored results on Noometry and MiMo-V2.6-Flash has 13.