OpenAI API

The original LLM API, home to the GPT-5 series.

OpenAI API offers a free tier, with paid plans for higher usage.

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Typical Capabilities in This Category

General capabilities for this category — check the official site for details specific to OpenAI API.

Pay-as-you-go pricing with no upfront costs

REST API endpoints for easy integration

High throughput and low latency

Comprehensive documentation and SDKs

Who Is It For?

This describes the typical audience for tools in this category, not a verified claim about OpenAI API specifically.

OpenAI API is built for developers who are building AI-powered applications. If you need a reliable, scalable API to call LLMs directly from your code, this service gives you pay-as-you-go pricing, low latency, and all the SDKs you need to integrate AI into your product.

Pricing

OpenAI API has a free tier plus paid plans for more usage or advanced features. Free-tier limits and plan prices are set by the vendor.

Key pricing: GPT-5.4 from $2.50/1M input tokens, $15/1M output; GPT-5.4 mini from $0.75/$4.50 (data as of Nov 4, 2026)

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