Most AI APIs hand you a label and ask you to believe it.

gpt-5.5. claude-opus-4.8. minimax-m3. "Premium model."

What happens when the endpoint quietly swaps you onto something cheaper? Or mixes your traffic across three providers? Or wraps some other API and slaps a nice name on it? Or serves you a quantized stand-in that's 80% as good and 40% of the cost?

What evidence do you actually have that you got what you paid for?

Honestly, for most APIs the answer is: none. You have a string in a JSON field. That's it.

At AntSeed we're building the verification layer that string was always missing.