Under Lujan v. Defenders of Wildlife, you have to suffer a concrete, discernible injury. They can have broken their promise to you, but unless you can prove the dollar amount that harmed you, you can't sue.

Even if you donated to them, all states I know of assign sole oversight for proper management of those funds to the state AG. If you donate to a food bank and they use the money to buy personal Ferraris instead of helping the hungry, that's clearly illegal, but you'd be out the money either way, so you wouldn't have standing to sue. The attorney general has to sue for mismanagement of funds. If you feel OpenAI is violating their charter, I would definitely encourage writing to Mrs. Jennings to voice that opinion.