Model comparison
Grok 4.3 vs o4-mini
Grok 4.3 is the stronger model overall, scoring 43.8 to 41.6 on the Noometry Index.
Last verified . 31 shared benchmarks.
Summary
- They share 31 benchmarks with published results for both. Grok 4.3 scores higher in 6 categories and o4-mini in 4 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.3 leads 35.9 to 24.6.
- The biggest single-benchmark swing is SimpleQA Verified: 33.2% for Grok 4.3 and 19.6% for o4-mini.
- Grok 4.3 is cheaper at $1.25 / $2.50 per million input/output tokens, against $1.10 / $4.40 for o4-mini.
- Grok 4.3 accepts more context: 1M tokens versus 200K.
Side by side
| Grok 4.3 | o4-mini | |
|---|---|---|
| Provider | xAI | OpenAI |
| Noometry Index | 43.8 | 41.6 |
| Released | 2026-04-17 | 2025-04-16 |
| Weights | Proprietary | Proprietary |
| Context window | 1M | 200K |
| Max output | 30K | 100K |
| Input $ / M tokens | $1.25 | $1.10 |
| Output $ / M tokens | $2.50 | $4.40 |
| Results tracked | 40 | 60 |
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Category by category
Coding Too close to call
Grok 4.3: 41.6 (#121), o4-mini: 40.9 (#127)
| Benchmark | Grok 4.3 | o4-mini |
|---|---|---|
| WeirdML | 49.9% | 52.6% |
| LMArena Coding | 1415 | 1368 |
| ALE-Bench | 944.17 | 826.17 |
| SWE-bench Verified (bash only) | — | 45% |
| Aider Polyglot | — | 72% |
| LMArena WebDev | 1357 | — |
| SciCode | 47.3% | — |
| GSO | — | 3.6% |
| CadEval | — | 62% |
| AlgoTune | — | 1.72 |
Agentic & Tool Use o4-mini leads
Grok 4.3: 27.7 (#99), o4-mini: 32.6 (#61)
| Benchmark | Grok 4.3 | o4-mini |
|---|---|---|
| Berkeley Function Calling Leaderboard | — | 53.2% |
| GDPval | — | 25.3% |
| GDP.pdf | 8% | — |
| LMArena Search | 1165 | — |
| METR Time Horizons | — | 63.9% |
| Vending-Bench 2 | 35.26 | — |
Reasoning Grok 4.3 leads
Grok 4.3: 35.9 (#68), o4-mini: 24.6 (#162)
| Benchmark | Grok 4.3 | o4-mini |
|---|---|---|
| CritPt | 8% | 0.6% |
| Chess Puzzles | 25% | 26% |
| LMArena Hard Prompts | 1396 | 1351 |
| DTBench | 90.7% | 77.6% |
| LMCA | 38.3% | 26.5% |
| Epoch Capabilities Index | 149.16 | 145.64 |
| ForecastBench | 60.3 | 61.8 |
| ARC-AGI-2 | — | 6.1% |
| SimpleBench | — | 38.7% |
| Kagi LLM Benchmark | — | 67.6% |
| NYT Connections (extended) | 55.2% | — |
| ARC-AGI-1 | — | 58.7% |
| EnigmaEval | — | 9.2% |
| Mystery Game Puzzles | — | 5% |
Math Grok 4.3 leads
Grok 4.3: 46.0 (#74), o4-mini: 40.8 (#89)
| Benchmark | Grok 4.3 | o4-mini |
|---|---|---|
| FrontierMath (Tiers 1-3) | 42.8% | 36.1% |
| FrontierMath Tier 4 | 14.6% | 4.9% |
| OTIS Mock AIME 2024-2025 | 93.3% | 81.7% |
| LMArena Math | 1388 | 1389 |
| ProofBench | 11% | — |
| Omni-MATH | — | 72% |
| MATH Level 5 | — | 97.8% |
| FrontierMath (Feb 2025 set) | — | 24.8% |
| FrontierMath Tier 4 (v1) | — | 6.3% |
Knowledge Grok 4.3 leads
Grok 4.3: 52.5 (#62), o4-mini: 43.6 (#91)
| Benchmark | Grok 4.3 | o4-mini |
|---|---|---|
| GPQA Diamond | 88.8% | 79.6% |
| SimpleQA Verified | 33.2% | 19.6% |
| LMArena Expert | 1385 | 1343 |
| Humanity's Last Exam | — | 18.1% |
| MMLU-Pro | — | 82% |
| Confabulations | — | 15.8% |
| Vectara Hallucination Rate | — | 18.6% |
| GPQA (HELM) | — | 73.5% |
Multimodal o4-mini leads
Grok 4.3: 31.6 (#104), o4-mini: 40.2 (#49)
| Benchmark | Grok 4.3 | o4-mini |
|---|---|---|
| LMArena Vision | 1229 | 1194 |
| GeoBench | — | 64% |
| VPCT | — | 57.5% |
| Blueprint-Bench 2 | 0% | — |
Multilingual Grok 4.3 leads
Grok 4.3: 50.5 (#120), o4-mini: 47.0 (#154)
| Benchmark | Grok 4.3 | o4-mini |
|---|---|---|
| LMArena Non-English | 1385 | 1337 |
| LMArena Chinese | 1422 | 1354 |
| LMArena French | 1412 | 1364 |
| LMArena German | 1395 | 1336 |
| LMArena Japanese | 1379 | 1308 |
| LMArena Korean | 1356 | 1312 |
| LMArena Russian | 1399 | 1334 |
| LMArena Spanish | 1398 | 1347 |
Instruction Following o4-mini leads
Grok 4.3: 72.1 (#140), o4-mini: 75.2 (#68)
| Benchmark | Grok 4.3 | o4-mini |
|---|---|---|
| LMArena Instruction Following | 1366 | 1321 |
| IFEval | — | 92.8% |
Long Context o4-mini leads
Grok 4.3: 42.5 (#123), o4-mini: 45.5 (#33)
| Benchmark | Grok 4.3 | o4-mini |
|---|---|---|
| LMArena Longer Query | 1393 | 1315 |
| Fiction.LiveBench | — | 77.8% |
Writing & Preference Grok 4.3 leads
Grok 4.3: 58.5 (#118), o4-mini: 54.0 (#152)
| Benchmark | Grok 4.3 | o4-mini |
|---|---|---|
| LMArena Text | 1397 | 1353 |
| LMArena Creative Writing | 1380 | 1294 |
| LMArena Multi-Turn | 1406 | 1350 |
| Short-Story Creative Writing | — | 75% |
| WildBench | — | 85.4% |
| EQ-Bench 4 | 1075 | — |
Frequently asked questions
Is Grok 4.3 better than o4-mini?
Grok 4.3 is the stronger model overall, scoring 43.8 to 41.6 on the Noometry Index.
Which is cheaper, Grok 4.3 or o4-mini?
Grok 4.3 is cheaper. It lists at $1.25 per million input tokens and $2.50 per million output tokens; o4-mini lists at $1.10 and $4.40.
Is Grok 4.3 or o4-mini better for coding?
They score almost the same on coding (41.6 vs 40.9); test both on your own repository before choosing.
Which has the bigger context window?
Grok 4.3 does, with 1M tokens against 200K.
How many benchmarks do Grok 4.3 and o4-mini share?
31 benchmarks have published results for both models. Grok 4.3 has 40 scored results on Noometry and o4-mini has 60.