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status=429 - Claude Desktop

Quick fix

Streaming requests in CC Switch 3.15.0 skip the model rewrite and produce a 429. There is no official fix yet.

Symptom

Section titled “Symptom”
Error output
streaming=1 | request_model=claude-opus-4-7 | model=claude-opus-4-7 (NOT rewritten) | status=429

Cause

Section titled “Cause”

In CC Switch 3.15.0, the `claudeDesktopModelRoutes` model name rewrite skips streaming requests entirely. Streaming requests from Claude Desktop then carry a raw model name upstream cannot recognise (`claude-opus-4-7`), triggering a 429 rate limit error 100% of the time, while non-streaming requests are rewritten to the target model correctly and succeed. Separately, with the local proxy on, the system adds an `anthropic-beta: claude-code-20250219` marker to every request to take over model mapping, which makes a third-party model such as MiniMax believe it is Claude Opus — expected behaviour that does not affect which model the request actually reaches.

Fix

Section titled “Fix”

  1. The bug is not fixed in 3.15.0. Since non-streaming requests map correctly, try disabling streaming if your client supports it, as a stopgap, or wait for an official update.

Affected Versions

Section titled “Affected Versions”
ToolClaude Desktop
Version3.15.0
PlatformsmacOSLinux

Source Issues

Section titled “Source Issues”

This page is distilled from 3 real issues

FAQ

Section titled “FAQ”
With the local proxy on, why does a model such as MiniMax believe it is Claude Opus?
That is normal. The proxy has to take over model mapping, and forwarder.rs:931 adds the anthropic-beta: claude-code-20250219 marker to every Claude adapter request, which makes the upstream provider inject Claude identity information. The specific model the request reaches is still correct.
Section titled “Related problems”
cc-switch DeepSeek usage statistics inaccurate / balance query failsUpgrade to v3.19.2 and rebuild Codex usage. The balance query needs a correct {{apiKey}}, or a proxy.17 issues mergedunexpected status 404 Not FoundUpgrade cc-switch to v3.16.4+ and set the upstream format explicitly to Chat Completions on the Codex provider form.4 issues mergedunexpected status 401 Unauthorized CodexUse the built-in DeepSeek template instead of a hand-built config, or add http_headers to the config file by hand to pass the API Key.2 issues merged

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