Receipt

    Filed April 28, 2026

    Called it.

    The short version

    Elon Musk predicted on April 1, 2024: “Grok 1.5 will be the most powerful model in the world by every metric next week.” Verdict: Called it. Not achieved. Grok-1.5 released April 2024; benchmarks (e.g., LMSYS Arena) placed it behind GPT-4o, Claude 3 Opus, and Gemini 1.5 Pro.

    Prediction by

    Elon Musk

    On April 1, 2024

    Grok 1.5 will be the most powerful model in the world by every metric next week.

    Follow-up

    Not achieved. Grok-1.5 released April 2024; benchmarks (e.g., LMSYS Arena) placed it behind GPT-4o, Claude 3 Opus, and Gemini 1.5 Pro.

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