Microsoft is ending its revenue-sharing agreement with OpenAI. That's a big deal for a partnership that's shaped the entire AI market since Microsoft poured billions into the startup. The logic is pretty direct: the old financial arrangement was holding OpenAI back. With Anthropic and other competitors gaining ground, having Microsoft's revenue cut made it harder for OpenAI to move fast and price aggressively. Now they get more breathing room. At the same time, GitHub (owned by Microsoft) is moving Copilot to usage-based billing. The free token era is done. Microsoft is clearly trying to get its AI finances in order, because running these models burns cash and someone has to pay for it. Developers are already grumbling. Some mention DeepSeek V3 as a possible replacement if Copilot costs climb too high. Others eye Cursor or Codeium. Microsoft and OpenAI need sustainable revenue, but push too hard on price and users will jump to cheaper alternatives. There's also the regulatory situation. The UK's CMA, the European Commission, and the FTC have all been investigating whether Microsoft's OpenAI investment is effectively a merger that hurts competition. Microsoft already gave up its observer seat on OpenAI's board to satisfy European concerns. Loosening revenue ties looks like another move to stay ahead of regulators. But authorities remain focused on how Azure integrates with OpenAI's operations, and that relationship is much harder to untangle.