Model comparison
Grok 4.3 vs MiMo-V2-Flash
Grok 4.3 is the stronger model overall, scoring 43.6 to 40.8 on the Noometry Index. MiMo-V2-Flash costs 8.9× less per token, which makes it the better buy when Grok 4.3's lead doesn't matter for your workload.
Last verified . 21 shared benchmarks.
Summary
- They share 21 benchmarks with published results for both. Grok 4.3 scores higher in 4 categories and MiMo-V2-Flash in 4 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Grok 4.3 leads 52.5 to 39.1.
- The biggest single-benchmark swing is SciCode: 47.3% for Grok 4.3 and 25.9% for MiMo-V2-Flash.
- MiMo-V2-Flash is cheaper at $0.14 / $0.28 per million input/output tokens, against $1.25 / $2.50 for Grok 4.3.
- Grok 4.3 accepts more context: 1M tokens versus 262K.
- MiMo-V2-Flash has downloadable open weights; the other is API-only.
Side by side
| Grok 4.3 | MiMo-V2-Flash | |
|---|---|---|
| Provider | xAI | Xiaomi |
| Noometry Index | 43.6 | 40.8 |
| Released | 2026-04-17 | 2025-12-16 |
| Weights | Proprietary | Open |
| Context window | 1M | 262K |
| Max output | 30K | 66K |
| Input $ / M tokens | $1.25 | $0.14 |
| Output $ / M tokens | $2.50 | $0.28 |
| Results tracked | 40 | 21 |
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Category by category
Coding Grok 4.3 leads
Grok 4.3: 41.3 (#117), MiMo-V2-Flash: 35.8 (#205)
| Benchmark | Grok 4.3 | MiMo-V2-Flash |
|---|---|---|
| LMArena WebDev | 1357 | 1330 |
| SciCode | 47.3% | 25.9% |
| LMArena Coding | 1415 | 1443 |
| ALE-Bench | 944.17 | 737.95 |
| WeirdML | 49.9% | — |
Agentic & Tool Use Not comparable
Grok 4.3: 27.6 (#93), MiMo-V2-Flash: —
| Benchmark | Grok 4.3 | MiMo-V2-Flash |
|---|---|---|
| GDP.pdf | 8% | — |
| LMArena Search | 1165 | — |
| Vending-Bench 2 | 35.26 | — |
Reasoning Grok 4.3 leads
Grok 4.3: 34.9 (#60), MiMo-V2-Flash: 24.1 (#155)
| Benchmark | Grok 4.3 | MiMo-V2-Flash |
|---|---|---|
| CritPt | 8% | 0% |
| LMArena Hard Prompts | 1397 | 1420 |
| NYT Connections (extended) | 55.2% | — |
| Chess Puzzles | 25% | — |
| DTBench | 90.7% | — |
| LMCA | 38.3% | — |
| Epoch Capabilities Index | 149.13 | — |
| ForecastBench | 60.3 | — |
Math Grok 4.3 leads
Grok 4.3: 45.8 (#60), MiMo-V2-Flash: 35.6 (#141)
| Benchmark | Grok 4.3 | MiMo-V2-Flash |
|---|---|---|
| LMArena Math | 1388 | 1396 |
| FrontierMath (Tiers 1-3) | 42.8% | — |
| FrontierMath Tier 4 | 14.6% | — |
| OTIS Mock AIME 2024-2025 | 93.3% | — |
| ProofBench | 11% | — |
Knowledge Grok 4.3 leads
Grok 4.3: 52.5 (#57), MiMo-V2-Flash: 39.1 (#126)
| Benchmark | Grok 4.3 | MiMo-V2-Flash |
|---|---|---|
| LMArena Expert | 1385 | 1425 |
| GPQA Diamond | 88.8% | — |
| SimpleQA Verified | 33.2% | — |
Multimodal Not comparable
Grok 4.3: 31.6 (#96), MiMo-V2-Flash: —
| Benchmark | Grok 4.3 | MiMo-V2-Flash |
|---|---|---|
| LMArena Vision | 1231 | — |
| Blueprint-Bench 2 | 0% | — |
Multilingual Too close to call
Grok 4.3: 50.7 (#114), MiMo-V2-Flash: 51.1 (#109)
| Benchmark | Grok 4.3 | MiMo-V2-Flash |
|---|---|---|
| LMArena Non-English | 1385 | 1391 |
| LMArena Chinese | 1423 | 1463 |
| LMArena French | 1412 | 1429 |
| LMArena German | 1395 | 1395 |
| LMArena Japanese | 1379 | 1324 |
| LMArena Korean | 1357 | 1358 |
| LMArena Russian | 1399 | 1387 |
| LMArena Spanish | 1402 | 1420 |
Instruction Following MiMo-V2-Flash leads
Grok 4.3: 72.3 (#135), MiMo-V2-Flash: 73.7 (#115)
| Benchmark | Grok 4.3 | MiMo-V2-Flash |
|---|---|---|
| LMArena Instruction Following | 1366 | 1392 |
Long Context Too close to call
Grok 4.3: 42.5 (#118), MiMo-V2-Flash: 43.0 (#106)
| Benchmark | Grok 4.3 | MiMo-V2-Flash |
|---|---|---|
| LMArena Longer Query | 1393 | 1409 |
Writing & Preference MiMo-V2-Flash leads
Grok 4.3: 58.6 (#112), MiMo-V2-Flash: 59.9 (#101)
| Benchmark | Grok 4.3 | MiMo-V2-Flash |
|---|---|---|
| LMArena Text | 1397 | 1411 |
| LMArena Creative Writing | 1380 | 1375 |
| LMArena Multi-Turn | 1406 | 1404 |
| EQ-Bench 4 | 1075 | — |
Frequently asked questions
Is Grok 4.3 better than MiMo-V2-Flash?
Grok 4.3 is the stronger model overall, scoring 43.6 to 40.8 on the Noometry Index. MiMo-V2-Flash costs 8.9× less per token, which makes it the better buy when Grok 4.3's lead doesn't matter for your workload.
Which is cheaper, Grok 4.3 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; Grok 4.3 lists at $1.25 and $2.50.
Is Grok 4.3 or MiMo-V2-Flash better for coding?
Grok 4.3 scores higher on coding benchmarks: 41.3 versus 35.8 in the Noometry coding category.
Which has the bigger context window?
Grok 4.3 does, with 1M tokens against 262K.
How many benchmarks do Grok 4.3 and MiMo-V2-Flash share?
21 benchmarks have published results for both models. Grok 4.3 has 40 scored results on Noometry and MiMo-V2-Flash has 21.