Configure LongCat-2.5 in WorkBuddy

One-sentence takeaway

LongCat's official documentation provides two ways to configure LongCat-2.5 in WorkBuddy through an OpenAI-compatible API: the UI and a configuration file.

Use cases

• Suitable tasks: Using LongCat-2.5 in WorkBuddy for conversation, coding, and other agent tasks.

• Unsuitable tasks: Assessing model quality, speed, or cost; the source provides no evaluation data.

• Applicable model version: LongCat-2.5.

• Applicable client, agent, or API: WorkBuddy on Windows or macOS; OpenAI-compatible API.

• Recommended reasoning tier and parameters: Not specified; the configuration example enables supportsReasoning and supportsToolCall.

Ready-to-use content

When adding a custom model in WorkBuddy, enter:

You can also use the following models.json, replacing the placeholder with your own key:

{
  "models": [
    {
      "id": "LongCat-2.5",
      "name": "LongCat-2.5",
      "vendor": "LongCat",
      "url": "https://api.longcat.chat/openai/v1/chat/completions",
      "apiKey": "YOUR_LONGCAT_API_KEY",
      "supportsToolCall": true,
      "supportsReasoning": true
    }
  ]
}

Test or workflow steps

1. Get an API Key from the LongCat platform, make sure the account has sufficient token quota, and install WorkBuddy.

2. In the model switcher for a new task, select Configure Custom Model. On the Add Model page, enter the fields above and save; or create or edit the user-level models.json, add the configuration above, and restart WorkBuddy.

3. Turn off Auto mode, select LongCat-2.5 from the model list, and start using it.

Original evidence and data

• The documentation lists LongCat-2.5 as supporting OpenAI and Anthropic API formats, and uses an OpenAI-compatible API in its WorkBuddy example.

• Configuration file locations: on macOS, ~/.workbuddy/models.json; on Windows, <User Home>\.workbuddy\models.json. The project-level file is <project root>/.workbuddy/models.json and takes precedence over the user-level configuration.

• The source provides no quality, latency, or benchmark data.

Scope and limitations

• This is official setup documentation, not a hands-on validation; no API call was made for this article.

• The configuration file contains a key. Store it securely and do not commit a real key.

• The documentation does not specify the WorkBuddy version or reasoning parameters; the UI and service configuration may change between versions.

Reproduction notes

If the model does not appear in the list, check the JSON syntax, UTF-8 encoding without a BOM, and file path, then fully restart WorkBuddy. For a 401 error, check that the LongCat API Key and URL are correct; for a 404 error, check the model ID and full API URL.