OpenAI has announced that its GPT-4 API is now available to all paying customers.

The API has been under closed testing since its launch in March. Developers can integrate OpenAI's large language model (LLM) into their own products for uses such as summarisation, coding assistance, analysis, and composition.

OpenAI has also introduced updates to chat-based models, announced a shift from the Completions API to the Chat Completions API, and outlined plans for the...