OpenAI announced a set of changes to their model APIs. The biggest announcement is the addition of function calls for both GPT-3.5 and 4. This allows developers to enable plugins and other external tools for the models.

They also released new versions of GPT-3.5 and 4 that are better at following directions and a Version of 3.5 with 16K context window.

In addition, they made the embedding model 75% cheaper, which is used to create vector databases and allows models to dynamically load relevant data, like memory. GPT-3.5 also became cheaper now costing only $0.0015 per 1K input tokens.