Model comparison
Claude Sonnet 5.5 vs MiMo-V2.5-Pro
Claude Sonnet 5.5 is the stronger model overall, scoring 60.5 to 44.8 on the Noometry Index. MiMo-V2.5-Pro costs 7.4× less per token, which makes it the better buy when Claude Sonnet 5.5's lead doesn't matter for your workload.
Last verified . 5 shared benchmarks.
Summary
- They share 5 benchmarks with published results for both. Claude Sonnet 5.5 scores higher in 4 categories and MiMo-V2.5-Pro in 0 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Sonnet 5.5 leads 88.7 to 38.6.
- The biggest single-benchmark swing is ProofBench: 100% for Claude Sonnet 5.5 and 22% for MiMo-V2.5-Pro.
- MiMo-V2.5-Pro is cheaper at $0.43 / $0.87 per million input/output tokens, against $2 / $10 for Claude Sonnet 5.5.
- MiMo-V2.5-Pro accepts more context: 1.05M tokens versus 1M.
- MiMo-V2.5-Pro has downloadable open weights; the other is API-only.
Side by side
| Claude Sonnet 5.5 | MiMo-V2.5-Pro | |
|---|---|---|
| Provider | Anthropic | Xiaomi |
| Noometry Index | 60.5 | 44.8 |
| Released | 2026-09-28 | 2026-04-22 |
| Weights | Proprietary | Open |
| Context window | 1M | 1.05M |
| Max output | 128K | 131K |
| Input $ / M tokens | $2 | $0.43 |
| Output $ / M tokens | $10 | $0.87 |
| Results tracked | 16 | 27 |
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Category by category
Coding Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 65.5 (#6), MiMo-V2.5-Pro: 47.0 (#58)
| Benchmark | Claude Sonnet 5.5 | MiMo-V2.5-Pro |
|---|---|---|
| LMArena WebDev | 1699 | 1477 |
| SciCode | 61% | 50.2% |
| ALE-Bench | 1,819 | 899.8 |
| FrontierCode | 52.1% | — |
| CursorBench | 55.5% | — |
| FrontierSWE | 61.9% | — |
| LMArena Coding | — | 1502 |
Agentic & Tool Use Not comparable
Claude Sonnet 5.5: 44.9 (#14), MiMo-V2.5-Pro: —
| Benchmark | Claude Sonnet 5.5 | MiMo-V2.5-Pro |
|---|---|---|
| APEX-Agents | 75.5% | — |
Reasoning Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 52.4 (#29), MiMo-V2.5-Pro: 25.9 (#124)
| Benchmark | Claude Sonnet 5.5 | MiMo-V2.5-Pro |
|---|---|---|
| CritPt | 31.4% | 4% |
| NYT Connections (extended) | — | 34.4% |
| LMArena Hard Prompts | — | 1487 |
| Mystery Game Puzzles | 65% | — |
| DTBench | — | 84.5% |
| LMCA | — | 29.5% |
Math Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 88.7 (#4), MiMo-V2.5-Pro: 38.6 (#84)
| Benchmark | Claude Sonnet 5.5 | MiMo-V2.5-Pro |
|---|---|---|
| ProofBench | 100% | 22% |
| FrontierMath (Tiers 1-3) | 88.8% | — |
| FrontierMath Tier 4 | 80.5% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| LMArena Math | — | 1480 |
Knowledge Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 66.0 (#11), MiMo-V2.5-Pro: 41.5 (#100)
| Benchmark | Claude Sonnet 5.5 | MiMo-V2.5-Pro |
|---|---|---|
| GPQA Diamond | 95.6% | — |
| SimpleQA Verified | 46.5% | — |
| LMArena Expert | — | 1501 |
Multimodal Not comparable
Claude Sonnet 5.5: 53.2 (#5), MiMo-V2.5-Pro: —
| Benchmark | Claude Sonnet 5.5 | MiMo-V2.5-Pro |
|---|---|---|
| Furniture Assembly | 75% | — |
Multilingual Not comparable
Claude Sonnet 5.5: —, MiMo-V2.5-Pro: 55.3 (#33)
| Benchmark | Claude Sonnet 5.5 | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Non-English | — | 1449 |
| LMArena Chinese | — | 1507 |
| LMArena French | — | 1489 |
| LMArena German | — | 1455 |
| LMArena Japanese | — | 1418 |
| LMArena Korean | — | 1436 |
| LMArena Russian | — | 1450 |
| LMArena Spanish | — | 1470 |
Instruction Following Not comparable
Claude Sonnet 5.5: —, MiMo-V2.5-Pro: 77.6 (#21)
| Benchmark | Claude Sonnet 5.5 | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Instruction Following | — | 1477 |
Long Context Not comparable
Claude Sonnet 5.5: —, MiMo-V2.5-Pro: 45.4 (#38)
| Benchmark | Claude Sonnet 5.5 | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Longer Query | — | 1482 |
Writing & Preference Not comparable
Claude Sonnet 5.5: —, MiMo-V2.5-Pro: 65.5 (#47)
| Benchmark | Claude Sonnet 5.5 | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Text | — | 1465 |
| LMArena Creative Writing | — | 1440 |
| EQ-Bench Creative Writing | — | 1493 |
| EQ-Bench 4 | — | 1208 |
| LMArena Multi-Turn | — | 1477 |
Frequently asked questions
Is Claude Sonnet 5.5 better than MiMo-V2.5-Pro?
Claude Sonnet 5.5 is the stronger model overall, scoring 60.5 to 44.8 on the Noometry Index. MiMo-V2.5-Pro costs 7.4× 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-V2.5-Pro?
MiMo-V2.5-Pro is cheaper. It lists at $0.43 per million input tokens and $0.87 per million output tokens; Claude Sonnet 5.5 lists at $2 and $10.
Is Claude Sonnet 5.5 or MiMo-V2.5-Pro better for coding?
Claude Sonnet 5.5 scores higher on coding benchmarks: 65.5 versus 47.0 in the Noometry coding category.
Which has the bigger context window?
MiMo-V2.5-Pro does, with 1.05M tokens against 1M.
How many benchmarks do Claude Sonnet 5.5 and MiMo-V2.5-Pro share?
5 benchmarks have published results for both models. Claude Sonnet 5.5 has 16 scored results on Noometry and MiMo-V2.5-Pro has 27.