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<thinking> tags output as body text in Claude Code

Quick fix

Changing the provider's apiFormat from openai_chat to anthropic, if supported upstream, can bypass inline leakage.

Symptom

Section titled “Symptom”
Error output
<thinking>tool call</thinking>
日志很大。我先看当前配置和最近的日志内容。
English translation

<thinking>tool call</thinking> The log is large. I will first check the current configuration and the recent log content.

Cause

Section titled “Cause”

When Claude Code uses `apiFormat: "openai_chat"`, the Anthropic streaming conversion path outputs `choice.delta.content` directly as a `text` block without stripping inline `<thinking>...</thinking>` tags at the start of the stream. Thinking content is therefore displayed in plain text together with the response.

This occurs with the `<thinking>` variant: existing handling recognizes only `<think>` or covers only the Codex path, not this Claude conversion path. The issue report confirms that, if the upstream supports the native Anthropic interface, switching to the `anthropic` format avoids this conversion path.

Fix

Section titled “Fix”

  1. Confirm that the upstream provider supports the native Anthropic interface.

  2. Change this provider's `apiFormat` from `openai_chat` to `anthropic` so requests use the passthrough path and avoid this streaming conversion.

Affected Versions

Section titled “Affected Versions”
ToolClaude Code
Version3.20.4（受影响版本）
PlatformsWindows

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”
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