xAI released Grok 4.3 on May 8, 2026, positioning it as a capable general-purpose model at a notably low price point. The model supports a 1M token context window, built-in reasoning, native video input, and slide generation. Its Intelligence Index score of 53 compares favorably against a median of 35 across tracked models. The Voice Agent API, billed at $3/hr, is included in the launch. Eight legacy xAI models are scheduled for retirement on May 15, 2026. The aggressive pricing and breadth of modalities make Grok 4.3 a direct competitive move against OpenAI and Google in the API market. Developers evaluating voice or video-capable models now have a lower-cost alternative. Teams using legacy xAI models should migrate before the May 15 deadline to avoid service disruption.