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claude.ai

Set Claude.ai model and effort

Change the model and/or the effort level the Claude.ai composer uses for new chats, by id (from list_models). Pass model, effort, or both; the effort applies to the model selected once the change is made. The choice is saved to the account, so it holds across browsers and reloads. Returns the model and effort now selected as the site confirms them. A target that is already selected is left as is. Asking for an effort a model does not offer, or a model the picker does not list, fails with the available ids. Requires a signed-in session.

Input

model optional

Model id as list_models reports it, e.g. "claude-opus-5", "claude-sonnet-5", "claude-haiku-4-5-20251001".

effort optional

Effort level id. Not every model offers every level, and some (Haiku) offer none.

Output

model required

Id of the model now selected.

effort required

Id of the effort level now selected for that model. Null when the model has no effort levels.

FAQ

Change the model and/or the effort level the Claude.ai composer uses for new chats, by id (from list_models). Pass model, effort, or both; the effort applies to the model selected once the change is made. The choice is saved to the account, so it holds across browsers and reloads. Returns the model and effort now selected as the site confirms them. A target that is already selected is left as is. Asking for an effort a model does not offer, or a model the picker does not list, fails with the available ids. Requires a signed-in session.
Optional: model, effort.
It returns model, effort.
Yes. It acts as you on claude.ai: on your own Chrome it reuses your session, and on a Reduck-hosted browser it loads the claude.ai cookies saved by the Reduck extension.
It makes changes on claude.ai, like sending, posting or booking something.
Ask an AI agent connected to Reduck to run reduck/claude.ai/set_model, or run it from a terminal with the Reduck CLI: npx @reduck-ai/cli@latest run --script reduck/claude.ai/set_model
It is part of Reduck's official curated catalogue.

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