They could be aphids. Hard to tell with these pix. Aphids will have long antennae and thingies jutting out their rear. Aphids may not leave holes in leaves, but will suck juices from them. If this is just a limited-size bed, I'd just deal with them manually. Now, they do reproduce like crazy, but if they're not on suckable leaves, they may not be inclined to do so. Of course, insectidal soap is always a possibility. I'm a little surprised you're seeing a lot now. Aphids lay eggs in the fall that overwinter.

I've got to say I think the pictures are perfectly clear and I am in no doubt at all. Not all aphids have long antennae nor long rear ends. Their form depends on the stage they were produced in the life cycle. Judging by the large specimens alongside the little ones they are at a non winged viviparous stage. if the plants are inside (?) the aphids could well be at a stage they normally reach in summer.

There's no question that they are aphids.

Well, that would be a useful fact, to know that these (obviously container) plants are inside. The OP never said that. If that's the case, spraying anything would be silly.

If they are inside plants you can just squish them with your fingers or dab them with water on a Q-tip to remove them.

Both aphids and spider mites actually occur more frequently on indoor plants, because there are no predators.

Thank you everyone for the help. The bugs did have antennae before. I'm guessing these don't yet because they're young. The containers are outside on a second floor balcony. I will continue removing them by hand. :)

Please do not take aphids likely. You said that they destroyed your previous radish before and I think they will do it again. Prepare a bowl of diluted dish washing liquid and a paint brush with soft bristles, brush the leaves and they dead.

Hand squishing is more effective than a diluted dish detergent and MUCH less likely to cause leaf damage.