# GPT-4o mini vs Grok 4.3

> Grok 4.3 is the stronger model overall, scoring 43.8 to 25.5 on the Noometry Index. GPT-4o mini costs 6.0× less per token, which makes it the better buy when Grok 4.3's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/gpt-4o-mini-vs-grok-4-3
- Last updated: 2026-10-11
- Shared benchmarks: 27

## Summary

- They share 27 benchmarks with published results for both. GPT-4o mini scores higher in 0 categories and Grok 4.3 in 10 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in math, where Grok 4.3 leads 46.0 to 10.4.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 6.9% for GPT-4o mini and 93.3% for Grok 4.3.
- GPT-4o mini is cheaper at $0.15 / $0.60 per million input/output tokens, against $1.25 / $2.50 for Grok 4.3.
- Grok 4.3 accepts more context: 1M tokens versus 128K.

## Snapshot

| | GPT-4o mini | Grok 4.3 |
|---|---|---|
| Provider | OpenAI | xAI |
| Noometry Index | 25.5 | 43.8 |
| Rank | 343 | 86 |
| Context | 128K | 1M |
| Input $/M | $0.15 | $1.25 |
| Output $/M | $0.60 | $2.50 |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-4o mini: 22.0 (#335)
- Grok 4.3: 41.6 (#121)

| Benchmark | GPT-4o mini | Grok 4.3 |
|---|---|---|
| WeirdML | 11.8% | 49.9% |
| LMArena Coding | 1290 | 1415 |
| Aider Polyglot | 3.6% | — |
| LMArena WebDev | — | 1357 |
| SciCode | — | 47.3% |
| BigCodeBench Instruct | 46.1% | — |
| LiveBench Coding | 43.1% | — |
| BigCodeBench Complete | 57.4% | — |
| ALE-Bench | — | 944.17 |
| HumanEval+ | 83.5% | — |
| MBPP+ | 72.2% | — |

## Agentic & Tool Use

- GPT-4o mini: 27.5 (#101)
- Grok 4.3: 27.7 (#99)

| Benchmark | GPT-4o mini | Grok 4.3 |
|---|---|---|
| BALROG | 17.4% | — |
| GDP.pdf | — | 8% |
| LMArena Search | — | 1165 |
| Vending-Bench 2 | — | 35.26 |

## Reasoning

- GPT-4o mini: 8.7 (#347)
- Grok 4.3: 35.9 (#68)

| Benchmark | GPT-4o mini | Grok 4.3 |
|---|---|---|
| Chess Puzzles | 0% | 25% |
| LMArena Hard Prompts | 1267 | 1396 |
| DTBench | 54.4% | 90.7% |
| LMCA | 10.4% | 38.3% |
| Epoch Capabilities Index | 126.56 | 149.16 |
| ARC-AGI-2 | 0% | — |
| SimpleBench | 10.7% | — |
| Kagi LLM Benchmark | 28.8% | — |
| NYT Connections (extended) | — | 55.2% |
| CritPt | — | 8% |
| LiveBench Reasoning | 32.8% | — |
| Mystery Game Puzzles | 12% | — |
| LiveBench Data Analysis | 50% | — |
| ForecastBench | — | 60.3 |
| LiveBench | 41.3% | — |
| PIQA | 88.7% | — |

## Math

- GPT-4o mini: 10.4 (#314)
- Grok 4.3: 46.0 (#74)

| Benchmark | GPT-4o mini | Grok 4.3 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 0.7% | 42.8% |
| OTIS Mock AIME 2024-2025 | 6.9% | 93.3% |
| LMArena Math | 1267 | 1388 |
| FrontierMath Tier 4 | — | 14.6% |
| ProofBench | — | 11% |
| Omni-MATH | 28% | — |
| LiveBench Math | 36.3% | — |
| MATH Level 5 | 52.6% | — |
| GSM8K | 91.3% | — |

## Knowledge

- GPT-4o mini: 17.7 (#284)
- Grok 4.3: 52.5 (#62)

| Benchmark | GPT-4o mini | Grok 4.3 |
|---|---|---|
| GPQA Diamond | 37.7% | 88.8% |
| SimpleQA Verified | 8.3% | 33.2% |
| LMArena Expert | 1235 | 1385 |
| MMLU-Pro | 60.3% | — |
| Confabulations | 37.2% | — |
| GPQA (HELM) | 36.8% | — |
| BoolQ | 88.7% | — |
| MMLU | 81.8% | — |

## Multimodal

- GPT-4o mini: 25.9 (#122)
- Grok 4.3: 31.6 (#104)

| Benchmark | GPT-4o mini | Grok 4.3 |
|---|---|---|
| LMArena Vision | 1066 | 1229 |
| Video-MME | 64.8% | — |
| GeoBench | 64% | — |
| VPCT | 34% | — |
| Blueprint-Bench 2 | — | 0% |

## Multilingual

- GPT-4o mini: 42.0 (#199)
- Grok 4.3: 50.5 (#120)

| Benchmark | GPT-4o mini | Grok 4.3 |
|---|---|---|
| LMArena Non-English | 1266 | 1385 |
| LMArena Chinese | 1265 | 1422 |
| LMArena French | 1297 | 1412 |
| LMArena German | 1272 | 1395 |
| LMArena Japanese | 1216 | 1379 |
| LMArena Korean | 1195 | 1356 |
| LMArena Russian | 1275 | 1399 |
| LMArena Spanish | 1276 | 1398 |

## Instruction Following

- GPT-4o mini: 61.9 (#239)
- Grok 4.3: 72.1 (#140)

| Benchmark | GPT-4o mini | Grok 4.3 |
|---|---|---|
| LMArena Instruction Following | 1258 | 1366 |
| LiveBench Instruction Following | 56.8% | — |
| IFEval | 78.2% | — |

## Long Context

- GPT-4o mini: 39.1 (#186)
- Grok 4.3: 42.5 (#123)

| Benchmark | GPT-4o mini | Grok 4.3 |
|---|---|---|
| LMArena Longer Query | 1289 | 1393 |

## Writing & Preference

- GPT-4o mini: 39.5 (#248)
- Grok 4.3: 58.5 (#118)

| Benchmark | GPT-4o mini | Grok 4.3 |
|---|---|---|
| LMArena Text | 1286 | 1397 |
| LMArena Creative Writing | 1268 | 1380 |
| LMArena Multi-Turn | 1285 | 1406 |
| Short-Story Creative Writing | 67.2% | — |
| EQ-Bench Creative Writing | 873 | — |
| WildBench | 79.1% | — |
| EQ-Bench 4 | — | 1075 |
| LiveBench Language | 28.6% | — |

## FAQ

### Is GPT-4o mini better than Grok 4.3?

Grok 4.3 is the stronger model overall, scoring 43.8 to 25.5 on the Noometry Index. GPT-4o mini costs 6.0× less per token, which makes it the better buy when Grok 4.3's lead doesn't matter for your workload.

### Which is cheaper, GPT-4o mini or Grok 4.3?

GPT-4o mini is cheaper. It lists at $0.15 per million input tokens and $0.60 per million output tokens; Grok 4.3 lists at $1.25 and $2.50.

### Is GPT-4o mini or Grok 4.3 better for coding?

Grok 4.3 scores higher on coding benchmarks: 41.6 versus 22.0 in the Noometry coding category.

### Which has the bigger context window?

Grok 4.3 does, with 1M tokens against 128K.

### How many benchmarks do GPT-4o mini and Grok 4.3 share?

27 benchmarks have published results for both models. GPT-4o mini has 60 scored results on Noometry and Grok 4.3 has 40.