AI Flash Report

Claude 3.5 Sonnet API price history

Claude 3.5 Sonnet (Anthropic) currently costs $3.00 per million input tokens and $15.00 per million output tokens. Its price book last changed on 2026-05-11. Confirmed unchanged as of 2026-06-15.

Price timeline

$0 $4.13 $8.25 $12.38 $16.50 2026-04-12 2026-06-15 Input: $3.00/Mtok observed 2026-04-12 Input: $3.00/Mtok observed 2026-05-11 Output: $15.00/Mtok observed 2026-04-12 Output: $15.00/Mtok observed 2026-05-11 Input / Mtok Output / Mtok

Every observed price point

Claude 3.5 Sonnet dated API price observations
Observed Input / Mtok Output / Mtok Cache read / Mtok Source
$3.00 $15.00 — archive backfill
$3.00 $15.00 $0.30 archive backfill

Dates are when our snapshot observed the price, not necessarily the vendor's announcement date. Prices from each lab's official pricing page, per million tokens.

Full Claude 3.5 Sonnet model profile →