Generative AI API vs GPT-5 API

Two Artificial intelligence APIs with a free plan, compared field by field.

Generative AI API — GPT-4o integration GPT-5 API — content generation & business automation
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Paid from $9.99 $9.99
Updated 2025-11-26 2025-11-26

Generative AI API — GPT-4o integration

A REST interface onto GPT-4o for content generation, task automation and analysis, without the wiring an SDK integration needs.

It suits products adding a generative feature rather than building an AI platform.

Open Generative AI API — GPT-4o integration →

GPT-5 API — content generation & business automation

A REST front end to GPT-5 and other advanced models for text generation, business automation, content creation, chatbots, SEO writing and document analysis.

Setup is a single endpoint with secure integration and support for over 100 languages, which makes it usable without an SDK.

Open GPT-5 API — content generation & business automation →

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Updated 2025-11-26 by Bilgisam Ltd. About