Grok 4.3 Beta
Grok 4.3 Beta.
7
Benchmarks with a score
0
Ranked first, out of five or more models
0
In the top three
xAI Apr 2026
Grok 4.3 Beta
Closed weights
149.9
#71 of 256
Epoch Capabilities Index
- GPQA Diamond 88.8% #57 /229
- Chess Puzzles 18% #75 /93
- OTIS Mock AIME 2024-2025 93.3% #59 /212
Where it ranks
Its best score on each benchmark, and where that ranks among every model with a score there. We rank each model once, at its best setting.
Knowledge and language
| Benchmark | Score | Rank | Source | |
|---|---|---|---|---|
| SimpleQA Verified | 33.2% | #67 of 94 | Epoch AI run |
Math and science
| Benchmark | Score | Rank | Source | |
|---|---|---|---|---|
| GPQA Diamond | 88.8% | #57 of 229 | Epoch AI run | |
| OTIS Mock AIME 2024-2025 | 93.3% | #59 of 212 | Epoch AI run | |
| FrontierMath Tiers 1-3 v2 | 42.8% | #63 of 92 | Epoch AI run | |
| FrontierMath Tier 4 v2 | 14.6% | #59 of 74 | Epoch AI run |
Coding
| Benchmark | Score | Rank | Source | |
|---|---|---|---|---|
| WebDev Arena | 1,357 | #81 of 105 | arena.ai, via Epoch AI |
Agents and tools
| Benchmark | Score | Rank | Source | |
|---|---|---|---|---|
| Chess Puzzles | 18% | #75 of 93 | Epoch AI run |
xAI's models over time
xAI's models in color, against every other model on the Epoch Capabilities Index, by release date.
Source: Epoch Capabilities Index, Epoch AI (CC BY 4.0)