xAI launches Grok 4.3 at an aggressively low price and a new, fast, powerful voice cloning suite

xAI launched Grok 4.3, a new proprietary base model with a 1 million-token context window.

The model adds stronger reasoning, tool use, and agentic workflow support, while API prices are lower than before.

xAI also rolled out a fast voice-cloning suite on the web, expanding the product beyond text generation.

The move signals xAI’s push to compete on both capability and price with OpenAI, Anthropic, and Google.