Grok 4.3
Proprietary
Released alongside xAI's rebrand to SpaceXAI. Closed weights, API-only; included for completeness on the cloud-frontier comparison row.
Provider
SpaceXAI
Parameters
Unknown
Context
256K
Released
2026-05-04
Benchmark Scores
mmlu88%
humaneval87%
Scores are approximate and may vary by quantization level.