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"There's an issue with the selected model" claude-code error

Quick fix

Upgrade cc-switch to v3.13.0+ for the environment variable sync fix, and use the alias mapping variables to override the default model.

Symptom

Section titled “Symptom”
Error output
There's an issue with the selected model

Cause

Section titled “Cause”

In cc-switch versions before v3.13.0, takeover mode or local routing wrote only the proxy URL and token into settings.json without syncing ANTHROPIC_MODEL, so the model fell back or OpenCode generated a wrong config. Separately, Claude Code's own logic treats ANTHROPIC_MODEL as the startup main model only: when it requests an alias such as sonnet internally, it reads mapping variables such as ANTHROPIC_DEFAULT_SONNET_MODEL first. So configuring ANTHROPIC_MODEL alone cannot change which model an alias request actually reaches.

Fix

Section titled “Fix”

  1. Upgrade cc-switch to v3.13.0 or newer, fixing ANTHROPIC_MODEL being lost in takeover mode and the wrong config being generated.

  2. To change which model a Claude Code alias request actually reaches, set the matching alias mapping environment variable explicitly in the provider config.

    ~/.ccs/claude.settings.json
    {
      "env": {
        "ANTHROPIC_MODEL": "claude-opus-4-6",
        "ANTHROPIC_DEFAULT_SONNET_MODEL": "your-custom-sonnet-model",
        "ANTHROPIC_DEFAULT_OPUS_MODEL": "your-custom-opus-model"
      }
    }

Affected Versions

Section titled “Affected Versions”
Toolclaude-code
Versioncc-switch < 3.13.0 (已在 v3.13.0 修复)
PlatformsWindowsmacOSLinux

Source Issues

Section titled “Source Issues”

This page is distilled from 4 real issues

FAQ

Section titled “FAQ”
I changed ANTHROPIC_MODEL — why does Claude Code still call Sonnet by default?
Because when Claude Code requests an alias (sonnet/opus/haiku) it prefers alias mapping variables such as ANTHROPIC_DEFAULT_SONNET_MODEL. ANTHROPIC_MODEL only names the startup main model and cannot override the alias mapping case.
With routing on, switching model with /model inside Claude Code does not update the model field on the cc-switch provider page. Why?
A known experience problem with cc-switch UI sync: in routing mode, a switch inside Claude Code is not synced back into the cc-switch provider JSON config. Change the config in the cc-switch UI directly.
Section titled “Related problems”
ModelScope reports 401 token invalid - Claude CodeAdd ANTHROPIC_MODEL to the provider environment variables in cc-switch to resolve the 401. It is not synced to settings.json by design.2 issues mergedCodex provider API keys overwrite each other after a restart or switchEnable CC Switch local proxy takeover, or use experimental_bearer_token in config.toml, to bypass the auth.json sync defect.7 issues mergedANTHROPIC_CUSTOM_HEADERS lost after Deep Link importUpgrade to v3.12.0 or later to fix a bug where custom environment variables are dropped during Deep Link import.1 issues merged

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