What tasks is GPT-5.4 nano best suited for?
It is best suited for clearly defined and frequent classification, field extraction, candidate ranking, and simple programming assistance. Prompts should clearly specify decision criteria, allowed outputs, and how to handle missing information. If a task requires complex planning or final judgment, consider mini or a larger model.
Can it view images and generate images too?
You can use images together with text prompts for visual understanding and assisted classification. This describes a workflow with image-and-text input and text output, not an image creation entry point; if you need to generate or edit images, choose a dedicated image model and the corresponding API.
Should I choose Responses or Chat Completions for integration?
If you already have messages history management and choices parsing logic, you can use Chat Completions; if you use a response-object workflow, you can choose Responses and submit content through input. Both use gpt-5.4-nano, but their request structures and result parsing cannot be mixed.
How can I make nano continuously process the same conversation?
When using Chat Completions, put relevant history into messages; when using Responses, organize input and related conversation content according to the documentation. Provide the latest material, modification goals, and key constraints in each turn; for longer tasks, retain interim summaries and a final version that can be checked independently.
Can I make it always return JSON?
You can require JSON output in the prompt and clearly specify fields, types, and rules for missing values. The Chat Completions endpoint provides a response_format setting; when the selected mode applies to this model, it can be used together, but JSON format settings should not be treated as a guarantee that all structural constraints will be met. Business applications still need to parse and validate results, check field completeness, value ranges, and whether content matches the input, and handle formatting errors or incomplete responses.