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expected value at line 1 column 1 - Claude Code / Codex

Quick fix

Upgrade to cc-switch v3.14.1 or newer to fix the JSON parse failure caused by Codex OAuth forcing an SSE stream.

Symptom

Section titled “Symptom”
Error output
解析上游响应失败: expected value at line 1 column 1
English translation

Failed to parse the upstream response: expected value at line 1 column 1

Cause

Section titled “Cause”

On the Codex (ChatGPT Plus/Pro) provider through the OAuth reverse proxy, the upstream interface chatgpt.com/backend-api/codex/responses always returns an SSE streaming response regardless of the client stream parameter.

In cc-switch v3.13.0, when the client (Claude Code or Codex) sends a non-streaming request (stream: false), the proxy layer forces stream: true upstream, but the response handling side (handle_claude_transform) does not know that and still parses the SSE data the upstream returns as ordinary JSON — hence the expected value at line 1 column 1 parse error.

Fix

Section titled “Fix”

  1. Upgrade cc-switch to v3.14.1 or newer. That version handles the upstream response as SSE for the Codex OAuth combination and aggregates it for a non-streaming client.

Affected Versions

Section titled “Affected Versions”
ToolClaude Code / Codex
Version3.13.0
PlatformsWindowsLinux

Source Issues

Section titled “Source Issues”

This page is distilled from 2 real issues

FAQ

Section titled “FAQ”
What if it still reproduces after upgrading?
Make sure you really upgraded to v3.14.1 or newer. If it persists, reopen the issue on GitHub with the latest logs attached.
How do I fix this by hand in the source?
In the handle_claude_transform function in src-tauri/src/proxy/handlers.rs, change the streaming test to let is_stream = is_stream || api_format == "openai_responses"; so openai_responses always takes the streaming parse path, then rebuild.
Section titled “Related problems”
Your access token could not be refreshedUpgrade cc-switch to v3.17.0+, which fixes the PROXY_MANAGED placeholder polluting OAuth credentials or causing a 401 during takeover.5 issues merged401 Unauthorized: Incorrect API key providedAfter switching to OpenAI Official or turning the proxy off, clear the leftover third-party OPENAI_API_KEY from ~/.codex/auth.json and restart Codex.2 issues mergedCC Switch local proxy failed while handlingUpgrade CC Switch to the latest version and start a new Codex conversation; invalid schema or image blocks left in old session history will keep triggering 400.43 issues merged

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