Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
ElsewhereArea: what it touches
Internal ChangesKind: in v2.1.280,
Internal ChangesSection of the release
What
A new pricing tier called tier_4_20_cache_read_0_20 was added, defining per-million-token rates of $4 for input, $20 for output, $5 for 5-minute cache writes, $8 for 1-hour cache writes, and $0.20 for cache reads. This tier is used for Opus 5.5.
Why
This records the pricing Claude Code uses when calculating cost for Opus 5.5 usage.
