New Delhi, July 10 -- Meta CEO Mark Zuckerberg returned to X (formerly Twitter) for the first time in more than three years on Thursday to announce the launch of Muse Spark 1.1, the company's latest artificial intelligence model, alongside the public preview of the new Meta Model API for developers.

The posts marked Zuckerberg's first activity on the platform in over three years and signaled Meta's latest push to compete directly with OpenAI and Anthropic in the rapidly expanding market for enterprise AI models.

"Today we're releasing Muse Spark 1.1 -- a strong agentic and coding model at a very low price. It's available through our new Meta Model API and in Meta AI," Zuckerberg wrote.

In another post, he highlighted the model's capabi...