Claude Sonnet 5.5 prompt cache reads drop to $0.10 per million tokens

ClaudeProduct changeConfirmed

Anthropic halved the price of prompt cache reads on Claude Sonnet 5.5, from $0.20 to $0.10 per million tokens (0.05x the base input price instead of 0.1x).

Cache writes and all other prices are unchanged.
Anthropic says this cuts the cost of Sonnet 5.5 on most agentic tasks by around 20%.

Who can use it: Developers using prompt caching with Claude Sonnet 5.5, per the Claude Platform pricing.
When: 2026-10-07 · date only
Effective October 7, 2026.

Claude Platform release notes · Anthropic: Introducing Claude Haiku 5.5 Announced 2026-10-07 · date only

Read the official announcement for access details. Availability can depend on your plan, region or workplace settings.

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