Add support for GPT-5.4 in API Nodes

[qwqgong-ui]

Feature Idea

Description

Current API nodes in the repository only support GPT-5. I would like to request the addition of support for the GPT-5.4 model to take advantage of its improved reasoning capabilities and updated API parameters.

Motivation

• Enhanced Performance: GPT-5.4 offers significantly better multi-modal understanding which is crucial for complex ComfyUI workflows.
• Workflow Continuity: As my production environment shifts towards the 5.4 model, having native node support will prevent the need for custom Python script workarounds.

Proposed Solution

• Update the model selection dropdown in the GPT API Node to include gpt-5.4.
• Update the underlying API call logic to handle the specific requirements of the 5.4 endpoint (if any).

Existing Solutions

No response

Other

No response