Fidelity Bank has been advertising this money market special. It's also listed on the website for both its OK and KS branches. The 1.50% APY does require a $50K balance along with a checking account.
Full details from the website:
Earn 1.25% APY on balances of $50K or more, plus an extra 25 basis point bump when you also open any checking account with Money Market XTRA.
Minimum deposit is $10,000 to open. Earn a tiered APY on collected balances of: 1.25% on $50,000+, 1.00% on $10,000 to $49,999 and .50% on $9,999 and under. Fees could reduce earnings on this account. Maximum balance limitations may apply. The .25% bump will be applied to Money Market XTRA APY if a checking account is also opened by customer. The .25% bump is applicable to any tier.