Nope - Meta doesn’t split the budget evenly across your ads.
Instead, it uses its algorithm to automatically allocate more of your budget toward the ad that’s performing best based on your chosen objective, whether that's conversions, leads, or clicks.
Initially, Meta will test all the ads to gather performance data, but as it identifies a winner, it begins shifting more spend to that specific ad. Lower-performing ads may still receive some delivery, but they’ll get less budget unless performance trends shift.
This setup is great for hands-off optimization, but if you want to test each ad equally, you’ll need to place them in separate ad sets or use Meta’s A/B testing tool. Otherwise, expect Meta to favor what’s converting best; not split things 50/50.