bug: OpenAI API error during object generation: tools is not supported

[Ranteck]

Description

Taskmaster AI throws an OpenAI API error when attempting to parse a PRD file using the parse_prd command. The issue appears related to the model currently assigned to the research role in the configuration (gpt-4o-search-preview), which does not support the required functionality.

Steps to Reproduce

1. Set the research model to gpt-4o-search-preview in Taskmaster configuration.

2. Run the following command:

   {
     "projectRoot": "c:\\Users\\hugo1\\OneDrive\\Documents\\LIfeID\\lifeid-mobile",
     "input": "c:\\Users\\hugo1\\OneDrive\\Documents\\LIfeID\\lifeid-mobile\\.taskmaster\\docs\\prd.txt",
     "output": ".taskmaster/tasks/tasks.json",
     "force": true
   }
   

3. Observe the output in the console.

Expected Behavior

Taskmaster should parse the PRD file and output the generated tasks into .taskmaster/tasks/tasks.json without error.

Actual Behavior

Taskmaster fails with the following error:

Error: OpenAI API error during object generation: tools is not supported in this model. For a list of supported models, refer to https://platform.openai.com/docs/guides/function-calling#models-supporting-function-calling.

Screenshots or Logs

Error: OpenAI API error during object generation: tools is not supported in this model.

Environment

• Task Master version: \0.15.0
• Node.js version: \18.20
• Operating system: Windows 11
• IDE: \Windsurf

Additional Context

• The model currently used for research is gpt-4o-search-preview.
• Switching the research model to gemini-2.5-pro-preview-05-06 resolves the issue, suggesting this is a compatibility problem between Taskmaster and specific OpenAI models.
• Possibly related to tool/function calling incompatibilities with OpenAI’s newer preview models.

[Crunchyman-ralph]

I'm guessing this is more of an enhancement than a bug ?

[mateus4k]

Try changing research model to o4-mini in your .taskmaster/config.json:

"research": {
  "provider": "openai",
  "modelId": "o4-mini",
  "maxTokens": 64000,
  "temperature": 0.1
}

[Crunchyman-ralph]

Fixed in 0.18.0