If this is your final pot size or this is the only lighting you have (what is your lighting?), then consider flowering it now. Based on the internodal distance, spacing between branches, there's not enough light to support a full growth plant.
If you have more light available, your choice between topping and bending can be decided by timing. Each time you top the plant, you will delay the harvest date by 2 to 3 weeks. This is how long it takes to recover. By comparison, bending takes 0 to 3 days to recover, depending on how careful you are.
You're this helps a little.