Pro Max 5x 요금제, 중간 사용에도 1.5시간 만에 할당량 소진 문제

The Pro Max 5x subscription experiences a critical billing bug where cache_read tokens are incorrectly charged at full rate (1.0x) instead of the expected discounted rate (0.1x), causing users' token quotas to deplete in as little as 1.5 hours during moderate usage. This effectively undermines prompt caching's cost-saving benefits while exposing broader issues with background session token consumption and auto-compression overhead. The issue demands urgent clarification of token billing calculations and fixes to preserve user trust in Anthropic's premium tier.