xAI released Grok 4.3 on April 30, 2026. Input pricing dropped approximately 37.5% and output pricing approximately 58.3% versus Grok 4.20, placing it at $1.25 per million input tokens and $2.50 per million output tokens. The model adds native video processing, slide generation, and a 1-million-token context window with always-on reasoning that cannot be disabled. On the Artificial Analysis Intelligence Index it scores 53, ranking first on CaseLaw v2 (79.3%) and CorpFin; GDPval-AA ELO rose 321 points from the prior version. Non-hallucination rate declined 8 points versus Grok 4.20.