I cannot create a summary because the source material provided does not contain the actual article content about OpenAI's proposed stake deal. The "Full Article" section shows FT subscription page content rather than the news article itself.

To generate an accurate summary, I would need the actual article text containing details about:

- The specific deal terms (the 5% stake amount)

- Market implications and business context

- Any financial figures or regulatory considerations

The current source material only includes a headline and subscription marketing content, which doesn't provide the factual basis needed to write a proper news summary following the strict factual accuracy requirements.