Model comparison
Grok 4.3 vs MiMo-V2.5-Pro
MiMo-V2.5-Pro is the stronger model overall, scoring 45.2 to 43.8 on the Noometry Index.
Last verified . 26 shared benchmarks.
Summary
- They share 26 benchmarks with published results for both. Grok 4.3 scores higher in 3 categories and MiMo-V2.5-Pro in 5 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Grok 4.3 leads 52.5 to 42.2.
- The biggest single-benchmark swing is NYT Connections (extended): 55.2% for Grok 4.3 and 34.4% for MiMo-V2.5-Pro.
- MiMo-V2.5-Pro is cheaper at $0.43 / $0.87 per million input/output tokens, against $1.25 / $2.50 for Grok 4.3.
- 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
| Grok 4.3 | MiMo-V2.5-Pro | |
|---|---|---|
| Provider | xAI | Xiaomi |
| Noometry Index | 43.8 | 45.2 |
| Released | 2026-04-17 | 2026-04-22 |
| Weights | Proprietary | Open |
| Context window | 1M | 1.05M |
| Max output | 30K | 131K |
| Input $ / M tokens | $1.25 | $0.43 |
| Output $ / M tokens | $2.50 | $0.87 |
| Results tracked | 40 | 27 |
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Category by category
Coding MiMo-V2.5-Pro leads
Grok 4.3: 41.6 (#121), MiMo-V2.5-Pro: 47.4 (#60)
| Benchmark | Grok 4.3 | MiMo-V2.5-Pro |
|---|---|---|
| LMArena WebDev | 1357 | 1479 |
| SciCode | 47.3% | 50.2% |
| LMArena Coding | 1415 | 1503 |
| ALE-Bench | 944.17 | 899.8 |
| WeirdML | 49.9% | — |
Agentic & Tool Use Not comparable
Grok 4.3: 27.7 (#99), MiMo-V2.5-Pro: —
| Benchmark | Grok 4.3 | MiMo-V2.5-Pro |
|---|---|---|
| GDP.pdf | 8% | — |
| LMArena Search | 1165 | — |
| Vending-Bench 2 | 35.26 | — |
Reasoning Grok 4.3 leads
Grok 4.3: 35.9 (#68), MiMo-V2.5-Pro: 26.8 (#130)
| Benchmark | Grok 4.3 | MiMo-V2.5-Pro |
|---|---|---|
| NYT Connections (extended) | 55.2% | 34.4% |
| CritPt | 8% | 4% |
| LMArena Hard Prompts | 1396 | 1488 |
| DTBench | 90.7% | 84.5% |
| LMCA | 38.3% | 29.5% |
| Chess Puzzles | 25% | — |
| Epoch Capabilities Index | 149.16 | — |
| ForecastBench | 60.3 | — |
Math Grok 4.3 leads
Grok 4.3: 46.0 (#74), MiMo-V2.5-Pro: 40.0 (#96)
| Benchmark | Grok 4.3 | MiMo-V2.5-Pro |
|---|---|---|
| ProofBench | 11% | 22% |
| LMArena Math | 1388 | 1481 |
| FrontierMath (Tiers 1-3) | 42.8% | — |
| FrontierMath Tier 4 | 14.6% | — |
| OTIS Mock AIME 2024-2025 | 93.3% | — |
Knowledge Grok 4.3 leads
Grok 4.3: 52.5 (#62), MiMo-V2.5-Pro: 42.2 (#98)
| Benchmark | Grok 4.3 | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Expert | 1385 | 1503 |
| GPQA Diamond | 88.8% | — |
| SimpleQA Verified | 33.2% | — |
Multimodal Not comparable
Grok 4.3: 31.6 (#104), MiMo-V2.5-Pro: —
| Benchmark | Grok 4.3 | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Vision | 1229 | — |
| Blueprint-Bench 2 | 0% | — |
Multilingual MiMo-V2.5-Pro leads
Grok 4.3: 50.5 (#120), MiMo-V2.5-Pro: 55.1 (#34)
| Benchmark | Grok 4.3 | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Non-English | 1385 | 1449 |
| LMArena Chinese | 1422 | 1507 |
| LMArena French | 1412 | 1488 |
| LMArena German | 1395 | 1458 |
| LMArena Japanese | 1379 | 1412 |
| LMArena Korean | 1356 | 1437 |
| LMArena Russian | 1399 | 1450 |
| LMArena Spanish | 1398 | 1471 |
Instruction Following MiMo-V2.5-Pro leads
Grok 4.3: 72.1 (#140), MiMo-V2.5-Pro: 77.5 (#21)
| Benchmark | Grok 4.3 | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Instruction Following | 1366 | 1477 |
Long Context MiMo-V2.5-Pro leads
Grok 4.3: 42.5 (#123), MiMo-V2.5-Pro: 45.4 (#37)
| Benchmark | Grok 4.3 | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Longer Query | 1393 | 1483 |
Writing & Preference MiMo-V2.5-Pro leads
Grok 4.3: 58.5 (#118), MiMo-V2.5-Pro: 65.3 (#49)
| Benchmark | Grok 4.3 | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Text | 1397 | 1465 |
| LMArena Creative Writing | 1380 | 1440 |
| EQ-Bench 4 | 1075 | 1208 |
| LMArena Multi-Turn | 1406 | 1477 |
| EQ-Bench Creative Writing | — | 1493 |
Frequently asked questions
Is Grok 4.3 better than MiMo-V2.5-Pro?
MiMo-V2.5-Pro is the stronger model overall, scoring 45.2 to 43.8 on the Noometry Index.
Which is cheaper, Grok 4.3 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; Grok 4.3 lists at $1.25 and $2.50.
Is Grok 4.3 or MiMo-V2.5-Pro better for coding?
MiMo-V2.5-Pro scores higher on coding benchmarks: 47.4 versus 41.6 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 Grok 4.3 and MiMo-V2.5-Pro share?
26 benchmarks have published results for both models. Grok 4.3 has 40 scored results on Noometry and MiMo-V2.5-Pro has 27.