The quick read
- An API integration needs authentication, error handling, usage controls, interface design and evaluation.
- Choose an existing application when people mainly need direct assistance in its interface.
Choose the delivery model
A chat application packages interaction, account features and a user interface. API access lets developers integrate model capabilities into a separate product or workflow. Billing and entitlements may be separate, so a chat subscription should not be assumed to include application programming access.
Compare the work required
An API integration needs authentication, error handling, usage controls, interface design and evaluation. A chat product can reduce that implementation burden but may not fit a tightly controlled automated workflow. Compare the complete delivery effort, not only the price of model calls.
Match the use case
Choose an existing application when people mainly need direct assistance in its interface. Consider an API when software must invoke the model, process outputs or connect a specialised workflow. Check the current terms and limits of the exact product before budgeting.
Sources & notes
An editorial decision framework, not a scored benchmark or hands-on test.
anthropic.com — official reference
developers.openai.com — official reference
Sources reviewed for the September 2026 launch edition.