z.aiが /v1/models 相当のエンドポイントを用意してなくてクライアントによっては死ぬので擬似る

Caddyfile

proxy.zai.mohemohe.jp {
  route {
    handle /v1/* {
      uri replace /v1/ /api/coding/paas/v4/
    }

    handle /api/coding/paas/v4/models {
      header Content-Type application/json
      respond `{ "object": "list", "data": [
  { "id": "glm-4.6", "object": "model", "created": 0, "owned_by": "zai" },
  { "id": "glm-4.5", "object": "model", "created": 0, "owned_by": "zai" },
  { "id": "glm-4.5-air", "object": "model", "created": 0, "owned_by": "zai" },
  { "id": "glm-4.5v", "object": "model", "created": 0, "owned_by": "zai" }
]}`
    }

    handle /api/coding/paas/v4/* {
      reverse_proxy https://api.z.ai {
        header_up Host api.z.ai
      }
    }
  }
}