OpenAI reportedly declines to sign a letter backing open-source AI models

ns123abc · x · 2026-07-26

OpenAI appears to have declined to sign a public letter supporting open-source AI models.

The attached screenshot shows a list of companies and organizations that did sign, alongside Sam Altman’s post saying he wants the US to win in both open source and proprietary models. The key news is OpenAI’s refusal to join the open-source endorsement, which underscores the split between open and closed model camps.

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