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Musk’s lawsuit against Altman asks jurors to dig into grievances that stretch back to OpenAI’s founding.

OpenAI CEO Sam Altman, shown speaking in February at an AI summit in India, has endured years of questions about his honesty — an issue at the heart of a civil trial expected to start this week in California. | AP

In early 2023, when Elon Musk began attacking OpenAI in public, Sam Altman sent him a text.

He was upset.