OpenAI opens GPT-3.5 Turbo up for custom tuning

ChatGPT logo in minty green and black colors.
Illustration: The Verge

OpenAI has announced that businesses can now fine-tune GPT-3.5 Turbo using their own data — OpenAI claims the resulting custom model can match or exceed the abilities of GPT-4 for certain tasks. Later this fall, the company says it will open up the arguably more advanced GPT-4 for the same purpose this fall.

Fine-tuning lets businesses essentially hone ChatGPT to a more focused model that’s especially efficient for certain tasks. The supervised training would make a bot that’s unique to the client company so that it offers, say, reliable responses in a specific language or with more concise wording. Until now, business customers were limited to GPT-3 variants for this, like davinci-002 or babbage-002.

The model would come pre-trained, l…

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