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xAI used Claude outputs for training despite access cut-off

Elon Musk's xAI reportedly used outputs from Anthropic's Claude models to train its own coding models for several months. This continued even after Anthropic revoked access, with xAI allegedly using private accounts and the Blackbox AI service. During this period, xAI's pretraining team significantly reduced in size, with several key personnel departing. AI

IMPACT xAI's alleged use of competitor data for training raises questions about data provenance and competitive practices in model development.

RANK_REASON The article reports on alleged actions and internal team changes at xAI, rather than a direct model release or official announcement.

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xAI used Claude outputs for training despite access cut-off

COVERAGE [1]

  1. The Decoder TIER_1 English(EN) · Matthias Bastian ·

    Elon Musk's xAI reportedly trained its coding models on Claude outputs for months before getting cut off

    <p><img alt="" class="attachment-full size-full wp-post-image" height="768" src="https://the-decoder.com/wp-content/uploads/2026/06/xai_logo_wakk.png" style="height: auto; margin-bottom: 10px;" width="1376" /></p> <p> Elon Musk's xAI used Anthropic's Claude to train its own codin…