Model automatically switched to haiku cc-switch

Quick fix

Built-in Claude Code behavior: haiku reads files. cc-switch only manages environment variables and does not change model selection.

Symptom

Error outputCopy

我已经通过/model定义了模型是sonnet4.6，但是一开始问问题之后，模型就自动切换到了haiku上

这个是什么原因呢？在未使用ccSwitch，走自己的环境变量时没有这个问题

English translation

I set the model to sonnet4.6 with /model, but after I started asking questions, the model automatically switched to haiku. What is the cause? This issue does not occur when not using ccSwitch and using my own environment variables.

Cause

In #1389, the user set the main model to sonnet4.6 with /model, but after asking a question the model appeared to switch to haiku. This did not happen without ccSwitch when using their own environment variables. The maintainer replied that the haiku model is used for reading files and this is built-in Claude Code behavior; cc-switch only helps configure settings and does not change model usage. The root cause is not environment variable injection or a cc-switch configuration error, but Claude Code's own model division of tasks.

Other issues in this cluster are different environment-variable topics and should not use this page's conclusion: #614 (macOS remote server Claude environment variable configuration unsupported), #833 (Ubuntu still requires setting environment variables in bashrc after configuring cc-switch), #148 (Codex env_key), and #506 (injecting different environment variables into multiple sessions).

Fix

1. 1

   No change to cc-switch or environment variables is required. This is built-in Claude Code file-reading model behavior. The main model remains set to sonnet4.6 by /model.

Affected Versions

ToolClaude Code

VersionUnknown

PlatformsmacOSLinux

Source Issues

This page is distilled from 1 real issues

• #1389为何我的claude使用过程中会自动切换模型？

FAQ

What is the cause?

The haiku model is used for reading files. This is built-in Claude Code behavior. cc-switch only helps configure settings and does not change model usage.

Related problems

cc-switch keeps deleting my environment variablesClosing the conflict dialog does not delete anything. To clear it for good, remove the entry from your shell config or the Hermes config.yaml.3 issues mergedmodel does not support thinkingTurn the Proxy Rectifier off in cc-switch advanced settings, or upgrade to a fixed version. Qwen tool call loops and empty thinking blocks remain unresolved.5 issues mergedWSL path configured but skills are not read - cc-switchWindows cc-switch cannot read or install WSL ~/.agents/skills. Install and run the Linux build of cc-switch inside WSL instead.3 issues merged