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OpenAI Responses streaming text is duplicated in terminal events Claude Code

Quick fix

Temporarily avoid duplicate output by changing the provider API Format to OpenAI Chat Completions (openai_chat).

Symptom

Section titled “Symptom”
Error output
OpenAI Responses 流式文本在终态事件中被重复输出
English translation

OpenAI Responses streaming text is duplicated in terminal events.

Cause

Section titled “Cause”

When Claude Code uses `openai_responses` through CC Switch, normal streaming deltas have already output text. Some compatible gateways use incomplete or inconsistent correlation keys in terminal events, so `missing_suffix()` cannot identify sent content and forwards the full text again.

The reporter identified a specific trigger combination: `reasoning` appears before `message` in the stream, terminal `output` omits `reasoning`, and the terminal message has no `id`. The original post suggested content-aware resend logic, but the issue remains open and has no verified official fix.

Fix

Section titled “Fix”

  1. Change this provider's API Format to OpenAI Chat Completions (`openai_chat`) and avoid the `openai_responses` format.

  2. If `openai_responses` is required, the original post provides no verifiable official solution. Follow #6756 for progress on terminal text resend logic and regression tests.

Affected Versions

Section titled “Affected Versions”
ToolClaude Code
VersionUnknown
PlatformsUnknown

Source Issues

Section titled “Source Issues”

This page is distilled from 1 real issues

FAQ

Section titled “FAQ”

(No FAQ yet)

Section titled “Related problems”
ChatGPT authentication fails with global proxy enabled - CodexUpgrade cc-switch to v3.16.4+ and enter a working proxy address under 「设置 → 路由 → 全局出站代理」, then retry Codex/ChatGPT authentication.3 issues mergedUnable to Display Model Reasoning: Claude Code ProxyUpgrade to cc-switch 4.0.13 and retest. If the issue persists, ignore late reasoning deltas after the response body begins.2 issues mergedAfter setting CODEX_HOME, Codex saves configuration to the wrong locationNo verified universal fix was provided. Set the Codex configuration path manually; direct ${xxx} environment-variable reading is unsupported.2 issues merged

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