Wow. I saw 4.1B credits and thought it was super generous. But my math says the subscription plan gives less value than the API.
For example, API input is $0.435 / M tokens, which works out to 13.79 M tokens for $6.
Plan is 300 credits per input token, which works out to 13.67 M tokens at 4.1B credits per $6.
Very similar math for cache input and output.