Grok 4.3 Beta
ECI#68
149Grok 4.3 Beta is a closed-weights model from xAI, released April 17, 2026. It has an ECI score of 149 and ranks 68th of 254 tracked models. At the time of its release, it ranked 18th of 193 tracked models.
Grok 4.3 Beta vs select alternatives
| Domain | Benchmark | Grok 4.3 Beta | |||
|---|---|---|---|---|---|
ECI scoreBest score 169 | 149 | 146 | 152 | 149 | |
| Ranking | #68 | #80 | #51 | #69 | |
| Agent | Vending-Bench 2Best score $16,484 | $35 | — | $4,663 | — |
| Games | Chess PuzzlesBest score 76% | ||||
| Mathematics | FrontierMath Tiers 1-3 (v2)Best score 94% | ||||
FrontierMath Tier 4 (v2)Best score 100% | |||||
OTIS Mock AIME 2024-2025Best score 100% | |||||
| Science | GPQA DiamondBest score 96% | ||||
| Software engineering | Text Arena (Coding)Best score 1820 | 1357 | — | 1374 | 1397 |
WeirdML (v2)Best score 94% | |||||
| World knowledge | SimpleQA VerifiedBest score 76% |
