We get this question a lot!
OpenAI bases ChatGPT on the underlaying model GPT-3, (and meanwhile GPT-4).
Yes, GPT-3 is enabled in the Blits.ai platform. You can optionally use it as a chitchat module for your chatbots. If you do, it kicks in whenever your regular bot-flow gets an unexpected question. Such as your customer asking the bot name, age, whether it's married, if it's happy. You'd be surprised how many people ask questions like these to a bot.
Shortly after it has an official API. Like you, we're eagerly anticipating it's official release!