Trending Now - Xai Unveils Grok 4.3 With Enhanced Reasoning and Voice Cloning at Low Cost

WHO:

Techmeme - xAI, founded by Elon Musk, is a rival firm to OpenAI.

VentureBeat - Sam Altman is a co-founder of OpenAI and a former colleague of Elon Musk.

WHAT:

Techmeme - xAI launched Grok 4.3, featuring "always-on reasoning," a 1 million token context window, and low API pricing.

VentureBeat - Grok 4.3 is priced at $1.25 per million input tokens and $2.50 per million output tokens, with costs doubling after 200,000 input tokens.

VentureBeat - Grok 4.3 began beta testing in April for subscribers to xAI's SuperGrok and Premium+ plans.

VentureBeat - Grok 4.3 has a knowledge cut-off date of December 2025.

VentureBeat - xAI's Custom Voices allows users to clone a voice from a reference audio clip as short as 120 seconds.

WHERE:

VentureBeat - The Custom Voices feature is available only in the United States, with an exception for Illinois.

WHEN:

VentureBeat - Grok 4.3 began beta testing in April.

VentureBeat - The release notes indicate a knowledge cut-off date of December 2025.

WHY:

VentureBeat - xAI aims to compete with OpenAI and other firms by launching competitive new products and services.

HOW:

VentureBeat - Grok 4.3 processes information with "always-on reasoning," designed to maximize factual accuracy and handle complex, multi-step instructions.

VentureBeat - The model accepts both text and image inputs, outputting text, and is optimized for agentic workflows.

VentureBeat - xAI has implemented a "Higher context pricing" structure for requests exceeding the 200,000-token threshold.

VentureBeat - The Custom Voices feature allows users to create up to 30 new voices at a time and delete them in one click.

(UPDATED May 1, 2026 23:20 UTC)

xAI, the company founded by Elon Musk to rival OpenAI, has launched Grok 4.3, which features "always-on reasoning," a one million token context window, and competitive pricing. The new model, which began beta testing in April, is designed to handle complex tasks and accepts both text and image inputs, with a knowledge cut-off date of December 2025. Additionally, xAI's Custom Voices feature, available only in the United States with an exception for Illinois, allows users to clone voices from audio clips as short as 120 seconds, enabling the creation of up to 30 new voices at a time.