Makes me think they're not using anthropic directly but rather any downstream provider. Pretty much everyone has broken caching for anthropic models, which can make requests a couple dozen times more expensive for long contexts.

I did manage to blow through about 1k in a day once doing this, so I can see how one might reach 6k with broken caching + heavy workloads.

For comparison: What cost me me $1k via openrouter would have cost me maybe the weekly allowance of a claude max x20 subscription with proper caching (so like $50 instead). Don't use credits on claude by the way. That's another ripoff (just get more subscriptions).

You really can screw this up and pay x20 what you could have.