Given the French walkout regarding foundation model regulation at the EU summit my money is on them open sourcing it.
I know this ain't about open source per-say but it has a vibe.
"Leading the charge against any regulation for foundation models in the AI rulebook is Mistral, a French AI start-up that has thrown the gauntlet to Big Tech. Cedric O, France’s former state secretary for digital, is pushing Mistral’s lobbying efforts, arguing that the AI Act could kill the company. "