@danilo > Give me a week and you can have plans for a scalable fusion reactor design.
Oh... Trading "decades" of building AI for finally getting fusion after a week instead of perennial "in 20 more years" is so, so, so worth the deal.
Even if it burns out after that single miracle, having cheap clean energy will solve any climate-related problems in no time. We have solutions already, the problem is they aren't particularly energy-efficient.
With a few more hints at efficiency geoengineering can be achieved to marvelous results.