You can each claim whatever you want. Your W4 doesn't have to match your actual tax return. The W4 is just to tell your employer how much withholding to take out. Only you know how much tax you need to cover. But if you both have income you pay a higher tax on your combined income so you may need to have more tax withholding taken out of your pay. That means you need to claim less allowances on the W4.
