Having large funding rounds contingent on meeting milestones is common. Always has been.
Why not announce the funding after the milestones have been met?
The assumption that's conveniently left out is that the milestones are realistic
One of the stipulations is that OpenAI achieves "AGI"... Need I say more?
Also a lot of this "money" is in cloud compute and credits not cash so...
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It just makes comparing funding rounds hard to understand, since money in the bank is money in the bank, and a lot of the "committed capital if you reach a milestone" is capital that would be easy to get if you reached that milestone, if it is sufficiently advanced, and has enough outs, etc., that you may as well have just raised another round in the future.