Comment by varispeed

The biggest pet peeve is that you never know whether your request is dealt with by Opus and not Sonnet or Haiku or even something else and you still pay for Opus. You have to ask the model some difficult question and gauge which one is doing the work, but often they switch halfway the task when it goes downhill (they might say it is because of context window) but still charge you full price and you have to start the session again (them making even more money). This should be more regulated and externally audited, what exactly you are paying for.