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CC-Switch is a desktop app (with a system-tray quick switcher) for managing and switching model-provider configurations across AI coding tools — Claude Code, Codex, OpenCode, OpenClaw, and more. You register ScitiX once and switch to it with a click: CC-Switch writes the live config files (~/.claude/settings.json, ~/.codex/config.toml / auth.json) atomically, with automatic backups. Use Qwen/Qwen3.5-397B-A17B for both apps — it is served over the Anthropic Messages protocol that Claude Code speaks, and over the Chat Completions protocol that CC-Switch converts Codex traffic into. See the Models page for available models.

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How CC-Switch reaches ScitiX

CC-Switch points each tool at a local proxy and forwards requests upstream. It converts the protocol for Codex but not for Claude Code, which is why the two apps need different settings: The practical consequence: the model must be served over the protocol that actually reaches ScitiX. Qwen/Qwen3.5-397B-A17B is served over both, so it works for either app.

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Configure Claude Code

Create an API key on the ScitiX API Keys page first.
  1. Open CC-Switch and select the Claude Code app tab.
  2. Click + (top-right), keep the App-specific Provider tab, and choose Custom in the Preset dropdown.
  3. Fill in:
  1. Claude Code has three model slots (Opus, Sonnet, Haiku). Map every slot you intend to use to a model served over Anthropic Messages — selecting a slot mapped to an incompatible model fails with 400 unsupported_protocol. Besides Qwen/Qwen3.5-397B-A17B, both Qwen/Qwen3.6-27B and google/gemma-4-31B-it work; google/gemma-3-27b-it suits the Haiku slot because it is not a reasoning model.
  2. Click Add, then Enable on the ScitiX provider card — it shows “Currently Active”. Claude Code picks the change up immediately, no restart needed.
  3. In Claude Code, run /model and select one of your custom entries. Leaving it on Default keeps Claude Code’s own built-in default model, which ScitiX does not serve.
On this path CC-Switch holds the key itself: it writes ANTHROPIC_AUTH_TOKEN: "PROXY_MANAGED" into ~/.claude/settings.json and points ANTHROPIC_BASE_URL at its local proxy — no credential lands in the config file.

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Configure Codex

  1. Switch to the Codex app tab and click + → Custom.
  2. Fill in:
  1. Click Add → Enable.
  2. On this path CC-Switch does not hold the key — it writes an env_key reference into ~/.codex/config.toml, and you export that variable yourself:
The variable name is derived from the provider name. An export only lasts for the current shell session — add it to ~/.bashrc / ~/.zshrc to persist.
  1. Close and reopen your terminal — Codex only reads its config at startup.
CC-Switch — ScitiX provider (Edit Provider page)

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Verify

Switch to ScitiX from the provider card (or the tray icon → app submenu → ScitiX), then:
Ask each a test question; a normal reply means the switch worked. Because Qwen/Qwen3.5-397B-A17B is served only by ScitiX, a reply naming that model is proof the request went through ScitiX. Claude Code responding via ScitiX (Qwen/Qwen3.5-397B-A17B)

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FAQ

  • Claude Code says the selected model may not exist or may not be accessible: You are on the Default entry in /model, or on a slot mapped to an incompatible model. Run /model and pick a custom entry. Claude Code’s built-in entries carry a [1M] suffix — that belongs to Claude Code’s naming, not a model ID, and ScitiX registers no model under it.
  • I see 400 unsupported_protocol: The model is not served over the protocol that reached ScitiX. On the Claude Code side, pick a model available over Anthropic Messages; on the Codex side, confirm Needs Local Routing is on so Responses traffic gets converted.
  • Codex reports Missing environment variable: Export the variable named in ~/.codex/config.toml, then reopen the terminal.
  • I cannot delete the currently active provider: Switch away first, then delete it.
  • Fetch Models fails with 404 or 405: Type the model ID manually.
  • Can I use a Universal Provider? Yes. A Universal Provider (second tab in the add dialog) registers ScitiX for several apps at once; the per-app protocol differences above still apply, so check each app’s format and routing afterwards.
Verified on CC-Switch v3.19.2 (macOS); the UI may shift between versions.