claude-sonnet-5-5 price 50% cut on 2026-10-08
On 2026-10-08, Anthropic changed the published API price of claude-sonnet-5-5. The superseded price had stood for 10 days. This is the only recorded price change for this model in the index.
Every metered token direction on claude-sonnet-5-5 got cheaper that day. A cut is the direction people notice least, because a lower bill rarely prompts anyone to check what changed.
What changed
| Per 1M tokens | Before | After | Change |
|---|---|---|---|
| Cache read | $0.20 | $0.10 | -50% |
Your recorded history should not change when prices do
A cost tracker carrying a single current-price table would reprice every claude-sonnet-5-5 session you ran before 2026-10-08 at the new rate, silently restating months you already paid for. See what this change does to a real session, and why dated windows are the fix.
Provenance
Every value here carries a first-party source, and superseded prices are kept rather than overwritten. Windows before the index began are reconstructed from web archives and labelled as archived rather than claimed as first-party.
| Window | Source |
|---|---|
| Cache read, 2026-09-28 to 2026-10-08 | https://docs.claude.com/en/docs/about-claude/pricing |
| Cache read, from 2026-10-08 | https://docs.claude.com/en/docs/about-claude/pricing |
Related
Derived from the AI Price Index, last updated 2026-10-08. Licensed CC BY 4.0: reuse this with credit to the dataset page.