claude-code - 💡(How to fix) Fix /model thinking effort level resets between sessions [1 comments, 2 participants]

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anthropics/claude-code#46382Fetched 2026-04-11 06:21:46
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Bug

The /model command allows setting a thinking effort level (e.g., auto, low, medium, high). This setting does not persist between sessions. After setting it to auto in one session, starting a new session reverts it to medium.

Expected behavior

The thinking effort level chosen via /model should persist across sessions, similar to how the model selection itself is remembered.

Steps to reproduce

  1. Run /model and set thinking effort to auto
  2. Confirm it's set (works correctly within the session)
  3. End the session
  4. Start a new session
  5. Run /model to check the current setting
  6. Observe: effort has reverted to medium instead of auto

Environment

  • Claude Code CLI (latest)
  • macOS
  • Model: Opus 4.6 (1M context)

extent analysis

TL;DR

The thinking effort level set via the /model command does not persist across sessions, suggesting a need to modify how settings are stored or retrieved between sessions.

Guidance

  • Review the Claude Code CLI's configuration storage mechanism to ensure it supports persisting the thinking effort level setting.
  • Verify if there's an existing issue or feature request related to persistent settings in the CLI's repository.
  • Check the documentation for any environment variables or configuration files that could be used to set default or persistent settings for the /model command.
  • Consider adding a feature request or issue to the CLI's repository if the functionality to persist settings is not currently available.

Example

No specific code example can be provided without more details on the internal workings of the Claude Code CLI, but a potential solution might involve modifying the CLI to store user preferences in a persistent storage location, such as a configuration file.

Notes

The solution may depend on the internal implementation of the Claude Code CLI and how it handles user settings and preferences. Without access to the source code or more detailed documentation, the exact steps to fix the issue cannot be determined.

Recommendation

Apply a workaround by manually setting the thinking effort level at the start of each session until a persistent solution is implemented, as there is no clear indication of a fixed version that addresses this issue.

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FAQ

Expected behavior

The thinking effort level chosen via /model should persist across sessions, similar to how the model selection itself is remembered.

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