> When I use OpenAI, Openrouter etc., I can put 10 $ on my API key, and when the key leaks, someone can use these 10 $ and that's it.

On that note, I'll just mention that I had discovered over the last while that when you prepay $10 into your Anthropic account, either directly, or via the newer "Extra usage" in subscription plans, and then use Claude Code, they will repeatedly overbill you, putting you into a negative balance. I actually complained and they told me that they allow the "final query" to complete rather than cutting it off mid-process, which is of course silly, because Claude Code is typically used for long sessions, where the benefit of being cut off 52% into the task rather than 51% into it is essentially meaningless.

I ended up paying for these so far, but would hope that someone with more free time sues them on it.