Is this a world record? The GPT 5.5 ran for 19 hours

Yeah, I get the distinction you are making. Tokens and credits are not literally the same unit. Tokens are the usage meter, credits are the spend balance. But in practical API use, they are directly tied together. The more tokens you burn, the faster credits disappear. The exact conversion depends on model, input versus output, cached versus uncached context, and effort level. My point was about real production usage on high effort workloads. At that level, token volume turns into spend very quickly, even when caching helps.