Claude Desktop Third-party Inference cannot access GLM-5.2 through Anthropic-compatible endpoint

提交前确认 · Pre-submission checklist

• 我已搜索过现有 issue，确认这不是重复 / I searched existing issues and confirmed this isn't a duplicate.
• 我已阅读 CONTRIBUTING.md / I've read CONTRIBUTING.md.

问题类别 · Category

模型设置 / 切换 · Model config

涉及的 Agent 框架 · Agent framework

Claude Code

严重程度 · Severity

阻塞使用 · Blocking (无法使用核心功能 / core function unusable)

复现频率 · Reproducibility

必现 · Always

问题描述 · Description

When using Claude Desktop's Third-party Inference with Z.ai's Anthropic-compatible endpoint, it is currently impossible to use GLM-5.2.

Claude Desktop validates model IDs and only accepts Anthropic model names (e.g. claude-opus-4). Native model IDs such as glm-5.2 are rejected by the client.

However, Z.ai's Anthropic gateway maps all tested Anthropic aliases to glm-4.7 instead of glm-5.2.

As a result, there is currently no way to use GLM-5.2 from Claude Desktop Third-party Inference, despite the endpoint supporting it directly.

复现步骤 · Steps to reproduce

1. Configure Claude Desktop Third-party Inference.

Base URL:

https://api.z.ai/api/anthropic

2. Configure the provider with:

Model ID: claude-opus-4

3. Ask the model any question.

4. Observe that the backend model is GLM-4.7.

5. Verify using the Anthropic API:

POST /v1/messages
{
  "model": "claude-opus-4"
}

returns

"model": "glm-4.7"

6. Send the same request using

"model": "glm-5.2"

which returns

"model": "glm-5.2"

7. Attempt to configure Claude Desktop with

Model ID: glm-5.2

Claude Desktop rejects it with:

Doesn't look like an Anthropic model: expected a gateway model route referencing an Anthropic model (e.g. claude-sonnet-4-5, anthropic/claude-*). Name routes to match the underlying model.

期望表现 · Expected behavior

One of the following should be supported:

1. claude-opus-4 (or another documented Anthropic alias) should route to GLM-5.2.

OR

2. Documentation should provide the correct Anthropic-compatible alias for GLM-5.2.

Otherwise, Claude Desktop users cannot use GLM-5.2 through Third-party Inference.

实际表现 · Actual behavior

All tested Anthropic aliases route to GLM-4.7.

Native model IDs (e.g. glm-5.2) work correctly when calling the API directly, but cannot be used from Claude Desktop because the client validates the model name.

ZCode 版本 · ZCode version

Claude 1.24012.1 (0adcae) 2026-07-21T20:59:53.000Z

设备 / 系统 / 浏览器 · Device / OS / Browser

macOs Sequoia 15.7.7

截图 / 录屏 / 日志 · Screenshots / Recordings / Logs

Start by reproducing the Anthropic-compatible requests at https://api.z.ai/api/anthropic with claude-opus-4 and glm-5.2, then check the provider's documented model aliases and routing behavior. Done means either an accepted Anthropic alias routes to GLM-5.2 or the documentation identifies the correct alias for Claude Desktop.