Claude Sonnet 5.5 cache reads drop to $0.10 per million tokens
Anthropic's October 7 announcement halves Claude Sonnet 5.5 prompt-cache read prices from $0.20 to $0.10 USD per million tokens. Cache writes and all other prices are unchanged.
SessionWatcher editorial · Published · Updated · Source announcement: 2026-10-07
Cache reads cost half as much
Anthropic announced on October 7, 2026 that Claude Sonnet 5.5 prompt-cache reads now cost $0.10 USD per million tokens, down from $0.20. That halves the listed price for reading cached prompt tokens.
The new cache-read rate is 0.05 times the base input price, compared with the previous multiplier of 0.1.
Sources: Anthropic release notes: 2026-10-07
Other prices stay unchanged
The reduction applies to prompt-cache reads, not cache writes. Anthropic explicitly says cache writes and all other prices are unchanged, so this announcement is not an across-the-board Sonnet 5.5 token-price cut.
Sources: Anthropic release notes: 2026-10-07
AI assisted reporting, checked against the linked official sources. Source pages checked 2026-10-07. Editorial process and corrections.