v1.6.4 — Claude Sonnet 5.5 is priced

Claude Sonnet 5.5 now has a price, and a session that switched models is named after the one it used most.

Fixed

• Claude Sonnet 5.5 showed no cost. Its tokens were counted, but with no price on file its estimated cost was $0 wherever it appeared, so every total left it out. It's now priced at Anthropic's published rate: $2 per million input tokens and $10 per million output tokens, $0.20 to read the cache, and $2.50 or $4 to write it for 5 minutes or an hour. That's the same as Sonnet 5. The rate applies to Sonnet 5.5 usage you've already logged, so earlier days fill in too.
• A session that switched models was named after the model it used last. The Sessions table's Model column, and the order of the models listed in a session's details, followed whichever model the newest part of the log used. A long Opus session that ended with a few Sonnet 5.5 replies read "Claude Sonnet 5.5". It now names the model that did most of the work. Tokens and costs were never affected, since they're priced per day and per model.

Upgrading

• Update every computer you look at the dashboard on. Each one prices the usage it shows with its own price list. Click Update in the sidebar footer, or run git pull.
• No re-parse is needed. The cache format hasn't changed. A session nobody has used since keeps its old model name until its next message.
• Devices on any v1.6 release can still connect to each other.