You're wrong for OpenAI, their 5x/20x always referred to the full weekly limit, and my (and others') multiple tests confirmed it empirically multiple times by calculating API-equivalent prices, especially when going from one subscription tier to another.

You're right for Anthropic though, their 5x/20x is mostly for 5h limit.

> 20x was never about total usage, only 5h one

That was the case for Anthropic from what I remember, with everyone being pissed off about misleading marketing.

For OpenAI:

https://learn.chatgpt.com/docs/pricing

https://x.com/thsottiaux/status/2094254532020818191

> The Pro 20X is quite precisely 20X the usage of the Plus subscription, so it does exactly what it says on the tin.

Factually wrong. I mean how can 20x be about 5h usage when 5h limits were not part of the Pro plan for a long time.