Session model pick becomes default

“The /model command saves the chosen model as the default for every new session, with no warning.”

Is this your bug? What gets counted gets fixed. Pile on.

Paste this into your agent. It files your report, with your error and version.

I hit this bug: rapsheet.dev/sheets/claude-code/issues/565/file
Follow it to file my report. Show me the text before you send.

No install. No account. Public and anonymous. The link asks your agent for one report, nothing else. What it sends

Fading. No reports and thumbs-up in the last 7 days and 1 the week before, down from 2 a week at the late-September peak.

Model pick in one session becomes default for all sessions. Running /model or picking a model in the desktop Code tab saves it globally for every new session in every project, without clear warning.

Is this your bug?

File my report

Where: /model command
Error text: Set model to 'Sonnet 5' and saved as your default for new sessions
Versions: 2.1.283 to 2.1.293
Platforms: Linux, macOS, Windows
How bad: Loses work: code or files lost or damaged.

Part of: Session model choice not respected3 bugs

Stale model/effort label3 people
Gateway aliases pick older models2 people

Not quite your bug?

New sessions ignore default model2 people
Default model ignored2 people

Original reports4, newest first

Oct 29, 2026Desktop (Code tab, Windows): new sessions ignore default model; changing model in one session changes all sessions#105968
Oct 7, 2026/model persists default model across all new sessions silently, causing unexpected usage#100371
Sep 30, 2026/model in one session silently changes the model of every future session: an unnoticed downgrade led to data loss and put a root-privileged system agent on a model the user never chose#98539
Sep 25, 2026Code tab (desktop app) still applies the model/effort pick globally across projects — the behaviour fixed in #20745 for the CLI#97292