# Anthropic halves price of prompt cache reads on Claude Sonnet 5.5

> Effective Oct 7 2026, Claude Sonnet 5.5 prompt cache reads cost $0.10 per million tokens, down from $0.20.

Oossa · 2026-10-07 · https://oossa.com/en/anthropic-halves-price-of-prompt-cache-reads-on-claude-sonnet-5-5

Event date: 2026-10-07

Anthropic announced a price cut for using prompt caching with its Claude Sonnet 5.5 model. The cost to read cached prompts is now $0.10 per million tokens, half the previous $0.20 rate. Writes to the cache and all other pricing remain the same. The change is reflected in the API release notes published on Oct 7 2026.

## The facts

- Price for cache reads lowered to $0.10 per million tokens
- Effective date: 2026-10-07

## Why it matters

Developers can reduce API costs when reusing prompts, making large‑scale Claude Sonnet 5.5 deployments cheaper.

## Sources & references

1. [docs.anthropic.com: October 7, 2026](https://docs.anthropic.com/en/release-notes/api#october-7-2026) – Anthropic API, 2026-10-07

Last updated: 2026-10-07