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CodeGPT is a VS Code coding assistant extension with Chat and Agent modes. Its OpenAI-compatible Custom provider connects to Step Plan models for conversations and code changes.

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Requirements

  • VS Code with the CodeGPT extension, ID danielsanmedium.dscodegpt. These configuration steps apply to CodeGPT 3.24.73.
  • A signed-in CodeGPT account with access to Local / Custom in model management.
  • An active Step Plan subscription, available quota, and access to the model.
  • An API key from the StepFun platform API keys page.

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Configure the connection

  1. Open Manage AI Models in the CodeGPT panel.
  2. Select Local, then Custom (any OpenAI-compatible server).
  3. Enter the connection settings.
CodeGPT appends /chat/completions to the base URL. This URL uses Step Plan subscription quota.
  1. Click Test. When Connected appears and the model list loads, select step-5-preview.
  2. Click Save & close.
  3. Select step-5-preview under Custom in the chat model picker and start a new conversation.
Configure the Custom provider’s URL, key, and model in the model management panel.

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Verify the integration

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Test a conversation

In Chat, enter:
Expected output: OK.

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Test tool calls

Create a separate test directory on a machine with Python installed. Add a README.md containing CodeGPT Step Plan test and open the directory in VS Code. Switch to Agent mode, confirm that step-5-preview under Custom is selected, and enter:
Approve the required file operations and commands. Check the tool records, the generated hello.py, and the Hello, StepFun! output.

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Check usage

In the StepFun platform usage details, match the request time, model ID, and billing source to confirm that the call used Step Plan.

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Common questions

Check the base URL, API key, and network connection. Use https://api.stepfun.ai/step_plan/v1 with a key from the corresponding platform account, then click Test again.
Confirm that Test shows Connected, and check your account’s Step Plan subscription and model permissions. Test the connection again before selecting a model.
Choose step-5-preview under Custom in the model picker. Check the model and billing source for the request in the StepFun platform usage details.
Confirm that Agent mode is selected and a project directory is open. Check file and terminal permissions. The Python example also requires a working local Python interpreter.